Page 6
5.5.1 General Information.................... 111 5.5.2 Jointing The Bottom Cutterhead................. 111 5.5.3 Jointing The Top Cutterhead ................113 5.5.4 Grinder Installation and Setup ................115 5.5.4.1 Preparation for Grinding ................. 115 5.5.4.2 Setting the Grinding Angle ................115 5.5.5 Grinding The Cutterhead Knives ................ 118 5.5.5.1 Grinding the Bottom Cutterhead..............
Page 7
Table of Figures Figure 1.5.1-A Foundation Plan: EPR-18 With Anti-Lap ............11 Figure 1.5.1-B Foundation Plan: EPR-18 With Anti-Kickback ........... 12 Figure 1.5.1-C Foundation Plan: EPR-18 With Machine Enclosure ..........13 Figure 1.5.1-D Foundation Plan: EPR-24 With Anti-Lap ............14 Figure 1.5.1-E Foundation Plan: EPR-24 With Anti-Kickback ...........
1 GENERAL INFORMATION 1.1 Warranty Except as otherwise specifically set forth herein, the Seller shall not be bound by representations, promises or inducements by its agents or employees. No course of prior dealings between the Seller and Purchaser and no usage of trade shall be relevant or admissible to, supplement, explain or vary any of the terms of this offer to purchase.
Page 11
(d) Defects in electrical equipment, ball bearings and other components purchased by Seller as complete units for installation in Seller's machines are not warranted herein, but will be replaced or repaired by the Seller in accordance with the warranty or guarantee of the manufacturer or supplier of said devices.
1.2 Safety Practices A. Do not operate, adjust or attempt to maintain this machine until: 1. You have been authorized and properly instructed in the skill you are to perform. 2. You have read and understand these instructions. B. Unless you have shut off all power and locked the switch: •...
Page 13
A WARNING looks like the following example, and indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. A DANGER warning looks like the following example, and indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Basic Safety Procedures Virtually all automated machinery has the potential to cause personal injury. Although the EPR-Series planers are more properly classed as semi-automated, they are not an exception. When the planer is well maintained and safely operated, avoiding injury is easy. The basic safety procedures that apply to automated machines are easily applied to these planers.
1.3.1 Safe Operating Practices Besides knowing and following the basic safety rules and procedures that must be in force in any industrial area, the planer operator and maintenance technicians must also observe safe rules of planer operation. The experience of the planer operator cannot be replaced in this area. Maintaining Machine Guards: The EPR-Series Planers have two different widths, and they have the same pinch points, cutterheads, and other hazards that are built-in.
1.3.2 Lumber Jams Clearing a Jam in the Planer: Jams are a fact of life around a planer, and they can occur at any time. Most accidents involving planers happen during the jam clearing process. The planer operator must pay special attention to his actions during the jam clearing process to prevent an accident.
The 72” straight edge is fastened to the shipping platform. Separate the smaller parts as they are checked so there will be no possibility of their being discarded with the packing material. Notify Newman Machine Company, Inc. immediately if there is a shortage. 1.4.3 Cleaning Before shipment all machined parts were coated with a rust preventative compound which may be removed by wiping with kerosene or varsol.
Page 18
If the machine is to be stored for an extended period of time (any length of time longer than 14 days from the ship date), the following steps should be taken: Coat all exposed metal surfaces with a heavy grease or rust preventative compound such as COSMOLINE.
1.5 Installing The Planer Some consideration should be given to the location of the planer prior to installation. Most installations where the planer is replacing another unit go smoothly, the exception being that there is not enough room for the bottom cutterhead to be rolled out. 1.5.1 Foundation The foundation should be per the foundation diagram for the model of machine that was purchased, i.e.
1.5.2 Accessory Equipment Accessory lumber handling equipment, such as conveyors and pinch-rolls, need to be properly setup during their installation. The accessory equipment centerline must be in line with the planer centerline, and with the equipment at the other end of the planer. The bedline of the planer will determine the height of the accessory equipment.
STRAIGHT EDGE CONVEYOR ROLL 1/4" TO 1/2" BELOW STRAIGHT EDGE BOTTOM INFEED ROLLS INCLINE TABLE & A.C.C. CONVEYOR BELT SHOULD NOT BOTTOM CUTTERHEAD CONTACT STRAIGHT EDGE UNTIL LOWERED 5 TURNS OF HANDCRANK APPROXIMATLY 6" FROM END TABLE AFTER BOTTOM HEAD END FRAME BOTTOM OUTFEED ROLL Figure 1.5.2-B Alignment of Outfeed Conveyor...
1.5.3 Electrical 1.5.3.1 Electrical Requirements The plant electrical connection to the planer is the customer’s responsibility. Connection to the planer’s main electrical panel is made through the top left-hand corner of the cabinet. The customer must provide a means of disconnecting the electrical power from the planer and locking it out.
inside of the main electrical panel cabinet door. The serial number of the machine is required when ordering extra copies of the electrical diagram. The magnetic starters are wired so that if either the top or bottom cutterhead motor stops due to an overload, the other cutterhead motor will also stop.
The area of the main exhaust duct should be equal to or slightly larger than the sum of the areas of the branch pipes. Elbows or turns in the pipe should have a radius in the throat at least equal to or greater than one and one half times the diameter of the pipe.
2 THEORY OF OPERATION 2.1 Planer Description The EPR-Series Planers are electrically driven double roughing planers. The planer accepts lumber at its’ infeed, lines it up with the cutterheads, and feeds the lumber through the cutterhead section. The cutterheads remove material from the top and bottom surface of the board simultaneously.
The A.C.C. (Automatic Cut Control) is a sectional, mechanical device designed and developed by Newman*Whitney to offset the fixed bottom head cut found on conventional knife planers, and to provide more equal cut distribution between the top and bottom cutterheads.
2.3 Controls The operator’s console is connected to the main electrical panel by a 30 foot conduit. This panel contains all of the operator’s electrical controls. (Section 2.3.1) The main electrical panel is connected to the planer by two 18 foot conduits. The remote or feeder console (Optional) is connected to the operator’s console by a 25 foot conduit.
Page 34
Operator’s Console Function Table FEED SPEED INDICATOR - Shows the feed speed of the upper feedrolls in feet per minute. It is active in both forward and reverse. TOP HEAD - Illuminated momentary pushbutton. Starts the top cutterhead motor, and indicates that the starter is in the run mode.
Page 35
CHIPBREAKER RELEASE - Activates a solenoid valve to operate the chipbreaker release. MAIN/FEEDER - 2 position rotary switch. Only present on machines with remote feeder console option. MAIN - All controls on the operator’s console are active. Only ‘E-STOP’ on feeder console is active.
2.3.2 Feeder Console (Optional) START FEED REV - FWD EMERG. STOP PRESSURE CHIPBREAKER STOP FEED RELEASE RELEASE BLANK Figure 2.3.2-A Feeder Console Feeder Console Function Table FEED START - Illuminated momentary pushbutton. Starts the upper feedroll motors and indicates that the starter is in the run mode. It will not engage unless both cutterhead motors are running.
32 - DOWN TRAVEL LIMIT 32 - UP TRAVEL LIMIT Figure 2.4.1-F Top Head Limit Stops Figure 2.4.1-G Chipbreaker Adjustments...
Page 42
Mechanical Adjustments Table Top Head Lock - Locks and unlocks top head yoke. Clockwise rotation locks yoke. Counter clockwise rotation unlocks yoke. Top Head Raising Screw Lock, (Left Hand) - locks top head raising screw in position. Used to level top head to incline table. Incline Table Scale.
3 PLANER MAINTENANCE This section is intended to give the planer operator and maintenance man the knowledge to perform effective preventative maintenance. Lubrication, suggested preventative maintenance schedule, and alignment procedures are in sections 3.1, 3.2, and 3.3. Separate sections on wear and replacement for major components are in section 3.4. Preventative maintenance is maintenance done on a schedule.
3.1 Planer Lubrication 3.1.1 Lubrication Schedule Lubrication is a necessity for increased machine life. Proper lubrication will increase the life of the bearings, various gear assemblies, and slide wear parts and decrease the number of repairs. The following intervals and lubricants (or their equivalents) are recommended. Planer Lubrication Schedule ITEM LUBRICANT...
Page 49
Planer Lubrication Points Table Top cutterhead bearing. Infeed roll bearing. Infeed roll pivot shaft bearing. Top head raising shaft bearing. Upper incline table slide. Top head power hoist drive chain. Top head hoist gearmotor. Top head raising gear assembly. Bottom head raising jackscrew. 10.
3.2 Preventive Maintenance Schedule This schedule is recommended by the Newman Machine Company Engineering. It does not include the cutterhead knives. Lubrication of the machine is covered in a separate schedule. ITEM ACTION SCHEDULE Clean area around top head Remove dust, chips, and shavings...
Page 52
The table after bottom head is used as the reference point for making all height and alignment adjustments. Refer to Figure 3.3.1-A. CAUTION Remove the main electrical power from the planer after Step 1. Restore main electrical power only after the maintenance action is complete.
Page 53
Check the 2nd infeed roll. It should be 0.0015” tight to the straight edge. If it is not, use the square head screws at the end of the roll to adjust the roll height up or down (Adjustment 19). Check the 3rd infeed roll. It should be 0.0015” tight to the straight edge. If it is not, use the square head screws at the end of the roll to adjust the roll height up or down (Adjustment 19).
Page 54
Check each chipbreaker assembly. The resistance as the block is pushed under the toes should be the same for all chipbreakers. • See section 3.3.4 for adjustment. • Pay attention to excessive loss motion in pins and links so as to always have spring tension when chipbreaker yields.
3.3.2 Leveling The Top Head Assembly Stop the planer and lock out the cutterheads and feed system. Unlock and raise the top cutterhead to approximately 6 inches. Raise the upper feedrolls and brace them in the raised position. CAUTION Remove the main electrical power from the planer after Step 1.
Page 56
Place the wooden top head setting block underneath the top head assembly so that the block is lengthwise to the cutterhead and chipbreakers. The block should be in between the cutterhead and chipbreakers. • Slowly lower the top head assembly until the block will not slide underneath the cutterhead.
TO CHECK THE ALIGNMENT OF THE PRESSURE BAR TO THE TOP CUTTERHEAD: This procedure is a continuation from step 12 of leveling the top cutterhead. Gently pull the block towards the outfeed of the planer. It should just barely start to go underneath the toe of the pressure bar.
The following instructions are intended to enable the maintenance personnel to adjust and set the pressure bar on an EPR Series Double Roughing Planer. The illustrations are simplified pictures of specific portions of the planer mechanism and are intended only to clarify the adjustment points mentioned.
Figure 3.3.3-A Placement Of Straight Edges Run the top head down using the hand crank until the front edge of the pressure bar just touches the front top side of the straight edge, and the rear side of the pressure bar is .008" above the straight edge (Figure 3.3.3.B).
If the pressure bar plate has been removed from the pressure bar slide, tighten the pressure bar tension screws until a moderate pressure is felt on the wrench. The lock-washer will not be completely compressed by the screw head. This allows the lock-washer to act as a spring.
Page 61
10. The amount of downward pressure exerted by the pressure bar on the wood can be controlled by adjusting the setscrews on the pneumatic actuator or the manual actuator. If your machine has an air-operated pressure bar, refer to paragraph 10.a and figure 3.3.3.D (a).
Figure 3.3.3-D Pressure Bar Actuator Adjustments If the pressure bar plate or pressure bar slide has been removed, make the following adjustments. Otherwise, these screws have been set at the factory and will not require adjustment. • Adjust the two pressure bar spring tension setscrews (Figure 3.3.3.C) to the full up position (until the spring is fully compressed and the screw does not turn).
3.3.4 Setting the Chipbreakers Stop the planer and lock out the cutterheads and feed system. Unlock and raise the top cutterhead to approximately 6 inches. Raise the upper feedrolls and brace them in the raised position. Clean the incline table and table after bottom head using compressed air and a solvent to remove chips and sap build-up.
Page 64
When the force on the top head setup block feels appropriate, lock the jam nut down on the adjustment nut. If slack in the movement of the chipbreaker is evident, adjust the tension of the chipbreaker. The tension adjustment is the two 3/4” nuts below the spring. •...
3.4 Leveling the Bottom Cutterhead Stop planer and lock out cutterheads. Unlock and raise top cutterhead to six inches. Disconnect and lock out main power. CAUTION Remove the main electrical power from the planer after Step 1. Restore main electrical power only after the maintenance action is complete.
• Raise or lower the incline table until pulling gently on each strip of paper can move the straight edge. Remove the paper. Slowly rotate the bottom cutterhead counter-clockwise by hand until at least one knife has passed underneath each straight edge. •...
3.4.1 Aligning The Anti-Lap Assembly Raise the top head to 6". Raise the upper feed rolls and brace them in the raised position. Clean the incline table and table after bottom head using compressed air and a solvent to remove chips and sap build-up. CAUTION Remove the main electrical power from the planer after Step 1.
• To decrease leaf spring tension, loosen the ¾” bolt that holds the leaf spring to the anti- lap bottom gage. 13. Ensure that the jam nut on the ¾” bolt is tightened. 14. Ensure no tools are left in the planer or on the infeed conveyor. Procedure complete.
3.4.2 Adjusting The Anti-Kickback Assembly 1. Stop planer and lock out cutterheads. Unlock and raise top cutterhead to six inches. Raise upper feedrolls and brace them in the raised position. Lock out cutterhead and feed starters at the main control panel. Clean the anti-kickback table, anti-kickback finger assembly, and infeed roll area using compressed air to remove chips.
3.4.3 Zeroing The ProScale The ProScale is an electronic measuring instrument that is used to measure the distance from bedline zero to the bottom of the top cutterhead cutting circle. The ProScale can display this distance in sixteenths (1/16), thirty-seconds (1/32), sixty-fourths (1/64), millimeters, or thousandths of an inch.
Page 71
Run a board through the planer, and measure the thickness of the board. This is the true height of the top cutterhead. Use the Set Plus (+) or Set Minus (-) button to increment the ProScale display until it agrees with the actual measurement. NOTE When installing a new Proscale, if negative values read, jumper JP3 in the display module must be changed.
3.5 Machine Wear And Maintenance Procedures Various parts of the machine wear faster than others, in particular the bedplates and hold- down devices. The hold-down devices are equipped with replaceable wear plates. The following sections deal with determining the amount of wear and how to replace these parts. Wood that is wet or has a large amount of dust and grit accumulation on the surface causes metal surfaces to wear faster than kiln dried wood.
3.5.1 Incline Table Insert Wear The incline table serves as the foundation for the top cutterhead. As the top cutterhead removes wood from the top side of the board, it presses the board downward. The incline table provides an even, stable surface for the cutterhead to work against. Over a period of several years, the lumber wears the surface of the incline table plate away.
3.5.1.3 Removing The Incline Table Insert Plate 1. Stop planer and lock out cutterheads. Unlock and raise top cutterhead to six inches. Raise upper feedrolls and brace them in the raised position. Disconnect and lock out main power. 2. Remove the lumber guide rails. Use care to avoid damaging the cutterhead knives. 3.
3.5.2 Automatic Cut Control Fingers The Automatic Cut Control fingers are made of hardened steel. As wood passes over them, the contact area is worn away. New fingers will project approximately 5/16” above a new incline table insert. When they have worn down to approximately 1/8”, they should be replaced The fingers should be replaced before they develop a sharp edge.
Page 77
Unlock and roll out the bottom cutterhead. The A.C.C. assembly will tend to fall into the cutterhead area when the screws are removed. Remove the two 1/4” socket head cap screws in each support arm, and remove the A.C.C. assembly from the planer. Loosen the setscrews in the lower side of each support arm.
3.5.3 Chipbreaker Wear and Replacement Each chipbreaker section has a hardened steel toe plate. The toe plate wears more rapidly with air-dried or dusty wood than with kiln-dried wood. When the toe plate has worn down to a sharp edge (3.4.3.A), it will tend to dig into lumber when reverse feed is selected.
Remove two 3/8” socket head cap screws from inside chipbreaker shoe (3.4.3.B) Remove toe plate. Inspect alignment roll pins. If the pins are in good condition, reuse them. • If toe plate has only been used on one end, reinstall so that unused end is next to cutterhead.
3.5.3.3 Removing The Chipbreaker Toeplate Height Adjustment Shaft Retaining Bolts Chipbreaker Spring Tension Adjustment Spring Rod Retaining Screw Figure 3.5.3-C Chipbreaker Assembly Stop planer and lock out cutterheads. Unlock and raise top cutterhead to six inches. Raise upper feedrolls and brace them in the raised position. Disconnect and lock out main power. Place a piece of cardboard inside of planer infeed section to catch any small parts that may be dropped.
Page 81
Manually adjust the top head assembly so that the upper pivot shaft may be removed. As the shaft is removed, the chipbreaker release levers will come out. Retain the release levers and the spacers from the shaft. CAUTION The chipbreaker sections weigh 23 pounds each and may have very sharp edges due to wear.
3.5.4 Set Reference For Bedline Zero If the table after bottom head plate has been resurfaced, it will be lower than the original setup, and the bedline zero reference point will be changed. Use the following procedure to re- establish the zero reference point for bed-line. Figure 3.5.4-A Setting Bedline Reference NOTE This procedure will result in inaccurate indications if the incline table insert plate...
Page 83
Lower the outfeed roll and infeed rolls below bedline as indicated by the straight edge. Roll the bottom cutterhead out of the machine to gain access to the jackscrews. • The straight edge may need to be held down at the outfeed end so that the straight edge will be flat on the incline table insert plate.
3.5.5 Replacing the Top Head Raising Screw and Worm Gear Figure 3.5.5-A Left Side Top Head Raising Gear Assembly Over the period of a year, very fine wood dust will enter the top head raising mechanism gear cavity. On an annual basis, the cavity should be cleaned out and filled with fresh grease. This will prolong the life of the brass worm gear.
Page 85
Stop planer and lock out cutterheads. Unlock and raise top cutterhead to six inches. Raise upper feedrolls and brace them in the raised position. Disconnect and lock out main power. Disconnect compressed air. Remove top head lock shaft, jam nuts, thrust bearing, and lock collar. Remove top head raising limit switch (if installed).
Page 86
18. Before assembling screw into gear, coat the screw with grease. Pack the thrust bearing with fresh grease. 19. Ensure that the set screw hole in the motor side screw is facing into the machine. Use a spirit level or other measuring device, across the top of both screws, to ensure that the screws are level.
All cutterhead spindles are equipped with specially manufactured precision ball bearings. Replacement bearings should be of the same type and may be ordered from Newman Machine Company, Inc. For long bearing life it is important that the lubrication instructions are followed as outlined in Section 3.1.
It is always preferable to use bearing pullers or bearing drivers when removing or installing bearings. However, these tools are not always available or may not be applicable to a particular situation. When it becomes necessary to install a new bearing without the benefit of an arbor press or bearing driver, installation can be performed with a hammer, but several precautions should be taken.
Page 89
Clean grease and dirt from the bearing and cutterhead shaft. Clean the interior of the bearing housing. Remove the bearing lock nut and lock washer. Use a set of bearing pullers to remove the bearing. NOTE Do not attempt to heat the bearing to remove it from the shaft. This may warp the cutterhead shaft, causing the cutterhead to be unbalanced.
Perform a complete alignment. Procedure Complete. 3.5.6.3 Bottom Cutterhead Bearing Replacement Stop planer and lock out cutterheads. Unlock and raise top cutterhead to 6 inches. Disconnect and lock out main power. Disconnect the compressed air connection. Bleed pressure off the planer’s pneumatic system. Remove the brake disc cover, brake caliper, and brake disc.
Page 91
Install the new bearing. Install the lock washer and lock nut, ensuring that one of the tangs on the washer lines up with a slot on the nut. After the nut is tight, bend the tang down into the slot. Using the grease gun and Lubriplate EMB grease, pack the bearing full of grease.
3.5.7 Pneumatic Feedroll Tires Pressure in the top roll pneumatic tires should always be maintained at 50 to 60 P.S.I. This is important for long tire life. The distance between the bottom of the tires and the top of the infeed and outfeed rolls should be set according to the thickness of the stock being run. If the tires spin on the lumber when in operation, it indicates the tires are set too high.
3.5.8 Pneumatic System The Pneumatic systems on the EPR-Series Planers are simple and easy to maintain. Extra contacts on control switches or relays control the pneumatic systems. 80 to 110 P.S.I. of air pressure is required for proper operation of the systems. If plant air pressure falls below 60 P.S.I., the feedroll raising mechanism may not work and the cutterhead brakes may not stop the cutterheads on shutdown.
Page 94
rate. If the drip rate is set high enough to soak the planer frame below the valve block, the rate is set too high and must be decreased. 3. Depending on the options installed either at the factory or on site, the planer may have as many as five solenoid operated valves installed.
3.5.8.1 Locally Manufactured Pneumatic Hoses DESCRIPTION DIAMETER LENGTH Top Head Brake ¼ 68” Air Actuated Pressure Bar Valve Supply ¼ 108” Pressure Bar Valve to Actuator ¼ 12” Bottom Head Brake ¼ 135” Top Head Chipbreaker 125” Roll Raising Cylinder – Up Pressure Supply 50”...
4.1.2 Planer Safety Devices Cutterhead Brakes: The cutterhead brakes on the EPR Series Planers were designed to stop the cutterheads after the power is removed from the cutterhead motors. Since the cutterheads can freewheel for up to five minutes, they present a safety hazard. The cutterheads must have stopped rotating before performing maintenance on the planer, or before attempting to clear a jam.
Unusual Events: Always pay attention to the way the planer operates. Even though all of Newman's machines are built to exacting standards, each machine will have it's own set of quirks. Familiarity with your planer can be an asset to the maintenance effort, thus increasing the safety of the planer.
4.1.5 Safety Considerations While Clearing a Jam 4.1.5.1 Avoiding Contact With A Rotating Cutterhead DO NOT reach into the cutterhead areas until you have visually verified that the cutterhead has stopped rotating. There is frequently no audible indication that the cutterhead is still spinning.
4.1.6 Clearing a Jam CLEARING A JAM IN THE EPR-SERIES PLANER WHEN A JAM OCCURS USE THE FOLLOWING STEPS IN ORDER IMMEDIATE ACTION CHECK TO ENSURE THAT THE "UP/RUN/DOWN" SWITCH IS IN THE 'DOWN' POSITION. IF IT IS NOT, MOVE THE SWITCH TO 'DOWN'. If the lumber does not start to feed: ACTUATE THE CHIPBREAKER TO RELEASE PRESSURE ON THE LUMBER.
4.2 Operating The Planer Operating an EPR-Series planer is simple enough that one individual can operate it under most circumstances. To run the planer, the following steps must have been accomplished: • Tools, cleaning materials, and trash have been cleared from the machine area, the planer, and infeed and outfeed lumber handling areas.
indicator also shows how much cut will be taken with the bottom cutterhead. This distance is not added to or subtracted from the target size set for the top cutterhead. If the incline table is set 1/8 inch below the table after bottom head, this is the maximum amount of cut that can be taken by the bottom cutterhead.
4.2.3 Setting the Anti-Lap The anti-lap gates should be set so that no piece of lumber can feed into the planer in an over-lapped or under-lapped condition. The upper gate must be set so that lumber of the correct size has enough clearance to get through the gates. Typically, the upper gate is set at the lumber thickness plus 1/8 inch to 1/4 inch extra to allow for the occasional piece that is oversized.
4.3 Planer Hints If clip or snipe appears on front end of board, one or more of the following could cause the trouble: 1. Top head chipbreaker not holding stock down. 2. Bottom head lower than table after bottom head. 3.
Page 106
If stock hesitates or stops in machine, one or more of the following could cause the trouble: 1. Too much pressure on chipbreaker. 2. Pressure bar too tight on stock (can be due to knife wear). 3. Bottom rolls set too low. 4.
5 HELICAL CARBIDE CUTTERHEAD MAINTENANCE General Information The Helical Carbide cutterhead was designed specifically to combat the serious noise problem experienced with conventional straight knife cutterheads. As a result, the cutterhead contains a large number of tightly spiraled carbide knife rows. To facilitate manufacturing and provide for economical replacement of damaged knives, the knife rows are formed by carbide tipped sections (inserts) which butt end to end to form a nearly continuous edge.
Page 108
cutterhead receives excessive wear, the inserts in that area should be switched with unworn inserts at regular intervals to maximize life. Because of the many variables involved, such as how many shifts per day, what variety of wood, how many feet of wood per shift, and even feed speed, it is difficult to give an exact interval for when to joint.
Glossary These are some of the terms and definitions that we use when talking about the Helical Carbide cutterhead. HELICAL CARBIDE CUTTERHEAD or CUTTERHEAD - These terms are used interchangeably to mean the spiraled planer cutterhead. The Helical Carbide cutterhead was designed to reduce the high noise level of straight knife type cutterheads.
Page 110
CLEARANCE ANGLE - The angle along which the top surface of the knife is ground. The top surface of the knife is also called the clearance face. The angle is required so that only the cutting edge of the knife contacts the lumber.
Page 111
turning. It is also used to remove the rounding caused by wear. Jointing is in part a dulling operation and should be held to a minimum. SPARKING - The final step in the grinding procedure, sparking uses the grinder to remove the high spots left on the knives.
Page 112
DIAL INDICATOR - A dial indicator set is used to check the alignment of the bottom head grinder rail when it is installed on the bottom head yoke; to check the alignment of the top head grinder rail to the top cutterhead body; to check the alignment of the bottom head jointer rail to the bottom cutterhead body;...
Page 113
JOINTER STONES - Also called honing stones, they are used to provide a fine edge on the knives and to true up the cutting circle from end to end. The longer one is used for the top head, and the shorter one is used for the bottom head. MACHINIST'S LAYOUT DYE or a common BLACK MAGIC MARKER with a wide tip may be used to darken the clearance face of the knives before grinding and before jointing.
Grinder Maintenance 5.4.1 Grinder General Information The grinder used on the EPR-Series Planer was designed for the purpose of grinding Helical Carbide cutterheads. It uses a diamond grinding wheel driven by a 110 volt AC motor through a belt system. It mounts on machined and hand scraped rails that are aligned with the cutterhead body to produce the most even grinding process possible.
one piece on a frame that slides on the grinder rails. A fingerwheel and screw assembly connect to a nut in the slide frame and raises or lowers the motor and grinding wheel assembly. This increases the depth of the grind. The small tick marks on the fingerwheel are for reference only. Each mark is approximately one-thousandth of an inch.
Page 116
The grinder may be stored with the wheel installed. To protect the wheel and follower finger a rail should be constructed to store the grinder on. Before storing the grinder, it should be blown off in general, and the motor housing in particular should be blown out. Now carefully place the grinder on the grinder rail.
gauge does not pass between the gib and the rail or the contact areas on the front of the rail and the grinder. Install the rail traversing screw nut on the back of the grinder. Using the handwheel, move the grinder from one side of the rail to the other and back again. If the grinder moves along the rail easily, snug the center screw down, and tighten all three jam nuts.
Page 118
Figure 5.4.3-B Bottom Head Grinder Rail Cleaning The entire machined surface of the pad must be clean of dirt, rust and other deposits. Clean it carefully with solvent and the Scotch-Brite pad. Because of the weight of the rail, have someone help install the rail on the bottom head yoke.
Page 119
Install the dial indicator on the bolt, positioning it to indicate on the side of the cutterhead. This will allow the rail to be positioned parallel to the long side of the cutterhead and reduce the error along the top of the cutterhead. Place the dial indicator close enough to the cutterhead to give a reading of 0.010”...
5.5 Normal Jointing And ReGrinding Procedures 5.5.1 General Information After the cutterhead has been in use for a while, usually several weeks, the operator will notice a change in the finish or that the planer is having more frequent feed problems or both. This indicates that it is time to joint the cutterheads.
Page 121
5. Install the bottom head jointer guard on the bottom head yoke. Tighten the two bolts securely. 6. Start the bottom cutterhead and let it run for several minutes to warm up the bearings. 7. Using the hand wheel, slowly move the jointer stone completely across the cutterhead.
5.5.3 Jointing The Top Cutterhead 1. Ensure the cutterheads have come to a complete stop. Lock the cutterhead motors out on the operator’s console. CAUTION Although the knives are becoming too dull to plane lumber efficiently, they are still sharp enough to cut the operator’s hand. 2.
Page 123
11. After the cutterhead has stopped spinning, inspect the knives again. This time the joint should show up on all the knife-edges and should look like Fig. 5.5.2-C.. 12. If the joint is very faint in some areas, joint again. This time make only one complete pass.
5.5.4 Grinder Installation and Setup In general, after the cutterhead has been jointed or honed three times, the land or heel formed by the jointing procedure will be approximately 1/16 of an inch across. When the joint mark is this wide, it is time to regrind the knives. Regrinding should be done only to the extent required to remove the land created by jointing, wear, or nose rounding.
Page 125
• If the mark is to the front of the knife, the grinding wheel must be lowered a small amount to allow it to contact the center of the knife. • When the mark is an even width all the way across the clearance face of the knife, the angle of the grinding wheel to the knife is properly set.
Page 126
3. The follower finger must be adjusted so that the ball rides in the top third of the gullet during the grinding stroke and so that the follower finger plate contacts the knife body below the edge of the knife during the return stroke. 4.
the cutterhead until the number 2 gullet is next to the follower finger and mark the cutterhead spindle with a 2. Repeat for all rows. 12. Unhook the grinding weight strap and pass the strap around the cutterhead spindle at the end away from the motor.
Page 128
Figure 5.5.5-B Weight on Top Cutterhead 5. After the grinder has passed over all the knives one time, while the grinder is at the end of the cutterhead, mark the starting point on the grinder fingerwheel indicator ring, and a reference mark on the frame.
8. Move the grinder to the end of the cutterhead opposite the motor and disconnect the screw nut from the back of the grinder. 9. Remove the stone retainer plate from the top head jointer stone holder and install a four inch long 5/16”...
Page 130
off the bluing. Move the grinder to the side, making sure that the grinding wheel does not scrape along the clearance face of the knife. Inspect the mark. 4. If the mark is to the rear of the knife, the grinding wheel must be raised a small amount to allow it to contact the center of the knife.
Page 131
15. If the mark is good, use the handwheel to move the grinder to the motor end of the cutterhead. Check to see where the follower finger plate contacts the knife. 16. If the follower finger plate touches the knife body on the rake face below the knife-edge, the follower finger is properly adjusted.
5.6 Installing New Knives 5.6.1 Grinding New Knives The following are tips and variations on grinding after a new set of knives has been installed in the cutterhead. Because of manufacturing tolerances and the way that a new knife bit will seat in the knife slot, the clearance face of the bits will vary in height.
5.6.2 Installing New Knives To install a new set of knives in the cutterhead you will need the following items: A new set of knife bits. T-Handle torque wrench. A #14 Torx bit and adapter. A ten inch, 3/8 inch extension adapter for the top head. A solution of Fabulene or other strong solvent to remove sap and dust residues from the cutterhead.
Page 134
• As each row is filled, the weight of the bits and screws will cause the cutterhead to turn. Do not let the cutterhead turn by itself with loose knife bits in it. Damage to the bits is possible. Use care in stopping the rotation of the cutterhead by hand since the knife bits are sharp enough to cut you.
5.7 Cutterhead Maintenance Occasionally, some hard foreign object goes through the planer and chips or even breaks a knife bit. One or two broken bits in the cutterhead will not affect the finish. If there are two or three or more bits that are in line with each other that are broken, then these bits must be moved around to regain the finish.
5.7.2 Replacing Broken Knives When a knife bit has been so badly damaged that it needs replacement, follow these steps. 1. Remove the damaged bit from the cutterhead, and discard it. Using a new knife bit and torque screw from the knife maintenance kit, replace it. Darken all the knives with bluing or magic marker.
5. Now set the height of the grinding wheel so that it just scrapes the clearance face of the knife. Do not worry if the wheel does not cut all the way across the clearance face of the knife. This just confirms that the clearance angle of the knives has changed over the course of several grindings.
Page 138
Repeat this procedure on the other cutterhead. Since the cutterheads do not share a common point of reference during grinding, the height of the knives on one cutterhead may be different from the other cutterhead knives. The second method uses the dial indicator, and is the more accurate method. It is most easily done when checking the accuracy of the grinding operation.
5.7.5 Calibrating an Impact Driver Prior to using an impact driver to install knife bits, the driver must be calibrated to deliver a torque of 250 inch/pounds. A pressure reducer must be assembled to control the torque. The pressure reducer consists of a pressure regulator with a male connector on the “IN”...
"rear". "Right hand" is always understood to be the observer's right hand as he stands facing the machine at the infeed end. Contact Information To place an order contact: Parts Sales Department Newman Machine Company, Inc. P.O. Box 5467 Greensboro, NC 27435-0467, U.S.A. 2949 Lees Chapel Road Browns Summit,NC 27214,USA E-Mail: sales@newmanwhitney.com...
Page 141
TABLE OF FIGURES Sub-Assembly Page Anti-Lap with Handwheel Adjustment ................ 133 Anti-Kickback Assembly .................... 136 Pneumatic Valve Panel ....................138 Infeed, Left Side ......................141 Infeed, Right Side ....................... 144 Lower Infeed Rolls ...................... 147 Infeed Roll Yoke, EPR-18 and EPR-24 ............... 149 Chipbreaker Assembly (EPR-18 and EPR-24 Prior to SN 15215) ........
Page 142
FIGURE 1 ANTI-LAP WITH HANDWHEEL ADJUSTMENT...
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 3533CM BRACKET, LEFT-HAND, ANTI-LAP 3127CM SHAFT TOP ROLL PIVOT 40586PP BEARING, 1-15/16 RFC, FAFNIR 004 * 41394PP SET COLLAR, 2" 3033CM GUARD, INFEED ROLL 1975CM YOKE, TOP ROLL 1977CM COVER, TOP ROLL YOKE 47809PP BEARING, FAFNIR RFC 2-3/16 CM1143...
Page 152
FIG. REF. # PART # NAME NOTES 4349CM TAB, READOUT CM1371 HOUSING, TOP HEAD BEARING 1192CM COVER, DISC TOP HEAD 1059CM DISC, BRAKE 44949PP CALIPER, BRAKE TOL-O-MATIC #P20DBR-0729 0000 018A* 44680PP REPLACEMENT PUCK 4511CM PLATE, LOCK TOP HEAD 4512CM SCREW, TOP HEAD RAISING L.H. 4514CM TUBE, CHIP CM289...
Page 157
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 3479CM PLATE, QUAD-ROLL INFEED 55600PP 1/2-13 UNC X 2-1/4 LONG SQ. HEAD HALF DOG POINT SET SCREW 47609PP SEALMASTER ST'A' BEARING ER-23 3480CM TUBE, ROLL, 18" 3481CM SHAFT, ROLL 3631CM BRACKET, ROLL ADJUST 1897CM SUPPORT, GUIDE 1899CM...
Page 159
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 1977CM COVER, TOP ROLL YOKE 3107CM SPACER WHEEL NO LONGER USED. ORDER PART # CM-3107 47809PP BEARING, FAFNIR RFC 2-3/16 47572PP STUD, WHEEL 1/2-20 X 2-7/8' LONG #610-144 TYPE A 47441PP WHEEL STUD, DOLMAN #610-073 47442PP NUT, DOLMAN #611-016...
Page 160
FIG. REF. # PART # NAME NOTES 4327CM YOKE, TOP ROLL 94751PP HELICAL GEARMOTOR, FLANGE-MOUNTED: S/N 15119 AND HIGHER #FAF87-DV1 60M4, 15HP, 1800 RPM, REQUIRES 94755PP OUTPUT 90 RPM, 3/60/230-460 VAC; CABLE ADAPTER BUSHING ENTRY NORMAL 015A 92844PP HELICAL GEARMOTOR, 15HP, 1800 RPM: S/N 15118 AND LOWER 3/60/230-460 4452CM 1...
Page 161
FIGURE 9 CHIPBREAKER ASSEMBLY (EPR-18 AND EPR-24 PRIOR TO SN 15215)
Page 162
FIGURE 9A CHIPBREAKER ASSEMBLY (EPR-24 SN 15215 AND HIGHER)
Page 163
FIGURE 9B CHIPBREAKER ASSEMBLY (EPR-18 AND EPR-24 PRIOR TO SN 15215) CHIPBREAKER ASSEMBLY (EPR-24 SN 15215 AND HIGHER)
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 84CM SHAFT, HINGE SHORT CM29 SHOE, CHIPBREAKER 27CM PLATE, TOP HEAD CHIPBREAKER TOE 186CM Spacer, Shaft, 1-1/32" ID CM182 LINK, TOP HEAD CHIPBREAKER 116CM HOLDER, SPRING ROD BOTTOM 185CM Spacer, Shaft, 1-5/32" ID CM179 LINK, BOTTOM (CSTG-CM21) 139MF...
Page 165
FIG. REF. # PART # NAME NOTES CHIPBREAKER 4241CM SHAFT HINGE LONG CHIPBREAKER LINK 4240CM SHAFT HINGE LONG CHIPBREAKER LINK 029 * 47598PP SOCKET HEAD SETSCREW, 3/8-16 X 1/2 LG., NYLON PATCH MACHINE EPR-24 (Serial Number 15215 and Higher) 84CM SHAFT, HINGE SHORT CM29 SHOE, CHIPBREAKER...
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 CM1238 SUPPORT, TOP HEAD ADJUSTING SHAFT 2064CM SHAFT, TOP HEAD ADJUSTING 40869PP BUSHING, BRONZE, BOST B-1418-8 40600PP BEARING, FLANGE, VF2S114M, 7/8 BORE 1240CM PLATE, L.H. WORM COVER CM1143 STAND, TOP HD, L.H. 4512CM SCREW, TOP HD.
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 1928CM PLATE, PRESSURE BAR 1909CM BAR, PRESSURE 002A SQUARE HEAD SET SCREW, 5/8" x 1-1/2" 002B JAM NUT, 5/8" 002C HEX BOLT, 5/8" x 1-3/4", WITH NUT AND WASHER 336MD SCREW, ADJUSTING , ECCENTRIC PRESSURE BAR 4553CM YOKE, TOP HEAD 18”...
Page 174
FIG. REF. # PART # NAME NOTES 55741PP TURN-ACT ROTARY ACTUATOR #122-111-04, 90 DEGREE, DOUBLE VANE ADJUSTABLE 4402CM BRACKET, PRESSURE BAR ACTUATOR 4412CM SHAFT, ECCENTRIC, AIR-OPERATED PRESSURE BAR, 24" 48919PP REXROTH PW67697-1 SOLENOID AIR 43064-PP SPRING, LATCH, PRESSURE BAR LEVER MD-702 LEVER, PRESSURE BAR RELEASE 43981PP...
Page 175
FIGURE 13 INCLINE TABLE AND AUTOMATIC CUT CONTROL...
Page 176
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 1946CM PLATE, INCLINE TABLE -18 INCH 1945CM INSERT, INCLINE TABLE - 18 INCH 1948CM SHAFT, TOE PIVOT 6075CM ARM, OUTER LEFT 004A 6074CM ARM, OUTER RIGHT 1741CM ARM, CENTER 3097CM TABLE, INCLINE, 18 INCH MACHINE 1951CM STOP 43422PP...
Page 178
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 4533CM SUPPORT, INCLINE TABLE, FIXED GIB 1866CM SUPPORT, INCLINE TABLE SUPERCEDED BY 4533CM 002+ 1895CM BAR, MOUNTING R.H. NOT USED WITH 4533CM 3257CM BRACKET, INCLINE GUIDE SUPPORT 004+* 1892CM GIB, R.H. NOT USED WITH 4533CM 3479CM PLATE, QUAD-ROLL INFEED...
Page 179
FIGURE 15 BOTTOM CUTTERHEAD AND BOTTOM HEAD RAISING ASSEMBLIES...
Page 180
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 3064CM BRACKET L.H. 3059CM EXTENSION 44863PP DUFF NORTON #M1802-1-1 24:1 RATIO 3051CM BAR, SUPPORT, BOTTOM HEAD 3874CM BEARING, MICARTA SLIDE, SUPPORT 006 * 45357PP SCREW, BRASS SLOTTED F.H. 1/4-20 UNC-2A X 5/8” LONG 3056CM BASE, BOTTOM HEAD YOKE, EPR-18 1168CM...
Page 181
FIG. REF. # PART # NAME NOTES 006 * 45357PP SCREW, BRASS SLOTTED F.H. 1/4-20 UNC-2A X 5/8” LONG 4310CM BASE, BOTTOM HEAD YOKE, EPR-24 92851PP ELECTRIC MOTOR, 50 HP, FR326TS, TEFC, 3600RPM, 3/60/230-460 VOLT, (TOSHIBA) 92867PP ELECTRIC MOTOR, 50 HP, FR326TS, TEFC, 3600RPM, 3/60/380 VOLT 44452PP WOODS SK 1-7/8 BORE 1/2 X 1/4...
Page 182
FIGURE 16 TABLE AFTER BOTTOM HEAD & BOTTOM HEAD LOCK ASSEMBLIES FIG. REF. # PART # QTY. NAME NOTES MACHINE EPR-18 1900CM SUPPORT, TABLE AFTER BOTTOM HEAD 41388PP SET COLLAR, 1-1/2” 1901CM SHAFT, ECCENTRIC LOCK 1902CM PLATE, TABLE AFTER BOTTOM HEAD 255MD LOCK, PLUG, BOTTOM HEAD YOKE 285MD...
FIG. REF. # PART # NAME NOTES MACHINE EPR-18 44820-PP RIM, TIRE, STANDARD SUPERCEDED BY P/N 46666CM 001A 3109-CM RIM, TIRE, FRONT MODIFICATION SUPERCEDED BY P/N 46666CM 001C * 4666CM RIM, TIRE, UNIVERSAL MODIFICATION QTY. AS REQUIRED PER ROLL 3107CM SPACER WHEEL NO LONGER USED.
Page 188
Figure 19 Continued FIG. REF. # PART # NAME NOTES 3033CM GUARD, INFEED, LEFT SIDE USED ON EPR-18 and EPR-24 3005CM COVER, CHAIN USED ON EPR-18 and EPR-24 4065CM COVER, PROXIMITY SWITCH USED ON EPR-18 and EPR-24 3159CM COVER, BOTTOM HEAD COUPLING USED ON EPR-18 and EPR-24 1192CM COVER, DISK, TOP HEAD...
Contact points for Material Safety Data Sheets are provided in this section for customer information. Newman Machine Company highly recommends that the customer contact the manufacturers of these items to obtain current copies of the Material Safety Data Sheet. If different materials are substituted for Newman’s recommended lubricants and grinding...
Page 213
SUPERABRASIVE GRINDING WHEEL Universal Superabrasives Metal & industrial Grinding Division 130 Wharton Road, Bristol, PA 19007 Information (215) 785-5266...
Need help?
Do you have a question about the EPR Series and is the answer not in the manual?
Questions and answers