Wood-mizer LT20L AH Safety, Setup, Operation & Maintenance Manual
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Wood-mizer LT20L AH Safety, Setup, Operation & Maintenance Manual

Wood-mizer LT20L AH Safety, Setup, Operation & Maintenance Manual

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Wood-Mizer
Sawmill
Safety, Setup, Operation
& Maintenance Manual
LT20L AH
rev. A1.02
Safety is our #1 concern! Read and understand all
!
safety information and instructions before operating,
setting up or maintaining this machine.
April 2003
Form #932

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Summary of Contents for Wood-mizer LT20L AH

  • Page 1 ® Wood-Mizer Sawmill Safety, Setup, Operation & Maintenance Manual LT20L AH rev. A1.02 Safety is our #1 concern! Read and understand all safety information and instructions before operating, setting up or maintaining this machine. April 2003 Form #932...
  • Page 2 +48-63-2626000. From the continental U.S., call our toll-free Parts hotline at 1-800-448-7881. Please have the vehicle identification number and your customer num- ber ready when you call. Wood-Mizer will accept these methods of payment: • Visa, Mastercard, or Select Purchase •...
  • Page 3 Sawmill and Customer Identification Each Wood-Mizer sawmill has a 17-digit Vehicle Identification Number (VIN). See the fig- ure below for VIN locations. See the chart for VIN description. V.I.N. LOCATIONS. F9 017 F9 .01 V.I.N. DESCRIPTION...
  • Page 4 Each sawmill is also identified with a model number which includes the base model and the engine/motor configuration. See the figure for a description of the model number. LT20 Engine/Motor Basic Sawmill I.D. Configuration MODEL NUMBER DESCRIPTION. When you pick up your mill, you will receive a customer number. Both the VIN and your customer number expedite our service to you.

  • Page 5: Table Of Contents

    Table of Contents Section-Page SECTION 1 SAFETY & GENERAL INFORMATION Blade Handling......................1-2 Sawmill Setup......................1-3 Sawmill Operation..................... 1-4 Sawmill Maintenance ....................1-6 Belt Sizes ........................1-7 Blade Sizes ........................ 1-7 Cutting Capacity......................1-8 Engine/Motor Specifications ..................1-9 Overall Dimensions ....................1-10 1.10 Chains ........................
  • Page 6 Table of Contents Section-Page SECTION 3 MAINTENANCE Wear Life........................3-1 Blade Guides ......................3-2 Sawdust Removal ...................... 3-2 Carriage Track, Wiper & Scrapers ................3-3 Vertical Mast Rails ....................3-4 Miscellaneous ......................3-4 Blade Tensioner......................3-5 Blade Wheel Belts ..................... 3-5 Brake Pads Adjustment ( Gas / Diesel Sawmills Only ) ...........
  • Page 7 It is always the owner's responsibility to comply with all applicable federal, state and local laws, rules and regulations regarding the ownership, operation and towing of your Wood-Mizer sawmill. All Wood-Mizer mill owners are encouraged to become thoroughly familiar with these applicable laws and comply with them fully while using or towing the mill.

  • Page 8: Safety & General Information Blade Handling

    Safety & General Information Blade Handling Blade Handling DANGER! Always disengage the blade and shut off the sawmill engine before changing the blade. Failure to do so will result in serious injury. WARNING! Always wear gloves and eye protection when handling bandsaw blades.

  • Page 9: Sawmill Setup

    Safety & General Information Sawmill Setup Sawmill Setup WARNING! Chock the trailer wheels to prevent movement before unhitching it from the towing vehicle. Failure to do so may result in serious injury or death. WARNING! Failure to put front outrigger down before moving cutting head from the rest position may result in serious injury.

  • Page 10: Sawmill Operation

    Safety & General Information Sawmill Operation Sawmill Operation DANGER! Make sure all guards and covers are in place and secured before operating or towing the sawmill. Failure to do so may result in serious injury. Be sure the blade housing and pulley covers are in place and secure.
  • Page 11 Safety & General Information Sawmill Operation WARNING! Use ONLY water with the water lube accessory. Never use flammable fuels or liquids. If these types of liquids are necessary to clean the blade, remove it and clean with a rag. Failure to do so may result in serious injury or death.

  • Page 12: Sawmill Maintenance

    Safety & General Information Sawmill Maintenance Sawmill Maintenance WARNING! Always secure the cutting head with a chain or a brace before adjusting the up/down chain. The cutting head may fall, causing severe injury or death. WARNING! Always secure the cutting head with a chain or a brace before adjusting the mast pads.

  • Page 13: Belt Sizes

    Blade Sizes See Table 1-2. Wood-Mizer TRU•SHARP™ offers three types of blades to provide efficient sawing for all models of sawmills. The engine/motor size of your sawmill and the type of wood you saw should determine which blade you choose for optimum performance.

  • Page 14: Cutting Capacity

    Safety & General Information Cutting Capacity Cutting Capacity See Table 1-3. The log size capacities of the LT20 series sawmill are listed below. Max. Max. Diameter Length LT20 S 71 cm 5.1 m (16' 8") LT20 M 71 cm 6.4 m (21') LT20 L 71 cm 8,4m...

  • Page 15: Engine/Motor Specifications

    20,2A, 2800 RPM 22HP Diesel Kubota 22HP 3600 RPM TABLE 0-0 See Table 1-6. The noise levels of the Wood-Mizer sawmills are listed below. Idle Engaged Sawmill Equipped With Gas Engine 95 dB (A) 98 dB (A) Sawmill Equipped With Electric Motor 77.1 dB (A)

  • Page 16: Overall Dimensions

    Safety & General Information Overall Dimensions Overall Dimensions See table 1-7. The overall dimensions of the Wood-Mizer sawmills are listed below. Model Width Weight Weight Length Width Height Operating Position w/Trailer (Loading Arms Raised) LT20SG15 6,7 m 3,5 m 2,5 m...

  • Page 17: Sawdust Extractor Specifications

    Safety & General Information Sawdust Extractor Specifications 1.12 Sawdust Extractor Specifications See table 1-10. The dust extractor specifications are given below. Maximum Capacity 2300 m Collector Inlet Diameters (in 2x140 mm front of fan) Motor Power 3 kW Number of Sacks for Waste 2 pcs Total Capacity of Sacks 0.25 m...

  • Page 18: Components

    Safety & General Information Components 1.13 Components See Figure 1-1. The major components of the Wood-Mizer LT20LAH are shown below. FIG. 1-1 1-12 25doc092506 Safety & General Information...

  • Page 19: Electrical Symbol Diagrams

    Safety & General Information Electrical Symbol Diagrams 1.14 Electrical Symbol Diagrams See Figure 1-2. Electrical Symbol Diagram of the LT20LAH is shown below: FIG. 1-2 Safety & General Information 25doc092506 1-13...
  • Page 20 Safety & General Information Electrical Symbol Diagrams Diagram elements descriptions (See figure above): Main electric box Symbol Name - type Wood-Mizer Part Switch, ABB OT32 E3 088265 Motor Circuit Breaker, Gz1 M21 084330 1M, 2M Contactor, LC1 D18 B7 084306...
  • Page 21 Safety & General Information Electrical Symbol Diagrams See Figure 1-3. Hydraulic electric diagram, LT20LAH. Safety & General Information 25doc092506 1-15...
  • Page 22 Safety & General Information Electrical Symbol Diagrams Symbol Name - type Syte-line number Contactor, LC1 K0910 P7 092736 Light, white XB4-BVM1 084310 Phase Supply Control Relay, RM4TG20 084452 Time relay, RE9 RA 11MW7 084453 Switch, C60N1P 1A 084454 Thermal Overload Relay, LR2 K0316 084456 Switch, ABB OT16E3 089801...

  • Page 23: Setup & Operation

    SETUP & OPERATION Stationary Sawmill Setup SECTION 2 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-1. Set up the mill on firm footing and level by eye. Fasten the mill to the floor to prevent any creep after prolonged use. NOTE: Make sure the unit is level before securing.
  • Page 24 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-2. Bed Rail Side Support Sm0130b FIG. 2-2 A30Sdoc092506 SETUP & OPERATION...

  • Page 25: Middle Track Cover

    SETUP & OPERATION Middle Track Cover Middle Track Cover Before operating the sawmill do as follows: 1. Clean the upper and lower rails to remove any sawdust and rust preventives. 2. Unbolt and remove the middle track cover from its storage position. 3.

  • Page 26: Replacing The Blade

    SETUP & OPERATION Replacing The Blade Replacing The Blade DANGER! Always shut off the sawmill motor before changing the blade. Failure to do so may result in serious injury. WARNING! Always wear gloves and eye protection whenever handling bandsaw blades. Changing blades is safest when done by one person! Keep all other persons away from work area when changing blades.

  • Page 27: Tensioning The Blade

    SETUP & OPERATION Tensioning The Blade Tensioning The Blade See Figure 2-4. Turn the blade tension handle clockwise to compress the rubber spring and tension the blade. Check the blade tension occasionally when adjusting the cant control or while cutting. As the blade and belts heat up and stretch, the blade tension will change.

  • Page 28: Tracking The Blade

    SETUP & OPERATION Tracking The Blade Tracking The Blade 1. Open the blade housing cover. 2. Turn the key switch to the ”H” position. 3. Manually spin one of the blade wheels until the blade positions itself on the blade wheels. 4.
  • Page 29 SETUP & OPERATION Tracking The Blade housing and pulley covers are in place and secured. To secure, use the detent pin and wire supporting the blade covers. CAUTION! After aligning the blade on the wheels, always check the blade guide spacing and location.

  • Page 30: Starting The Motor

    SETUP & OPERATION Starting The Motor Starting The Motor See the appropriate manual supplied with your specific motor configuration for starting and operating instructions. IMPORTANT! For safe operation of the sawmill, one person is sufficient, however in case of manual collection of sawn material, at least two persons shall be assigned to these activities in order to not exceed the manual load lifting standard.
  • Page 31 SETUP & OPERATION Starting The Motor Before starting the machine in a new location, at least once a year or after each repair, checks of insulation resistance and electric shock protection of the electrical system shall be performed. Performance of electrical systems checks and adequate measurements shall be ordered to an electrician having appropriate measurement qualifications.

  • Page 32: Hydraulic Control Operation

    SETUP & OPERATION Hydraulic Control Operation Hydraulic Control Operation The hydraulic control levers become operational when contacts located at the bottom of the carriage touch the power strip on the frame tube. The hydraulic control levers will only work when the cutting head is close enough to the front end of the mill to touch the power strip.
  • Page 33 SETUP & OPERATION Hydraulic Control Operation 1. Move the clamp out and down so it will not get in the way of logs being loaded onto the bed. Lower the clamp in/out lever to move the clamp out toward the loading side of the sawmill.

  • Page 34: Loading, Turning, And Clamping Logs

    SETUP & OPERATION Loading, Turning, And Clamping Logs Loading, Turning, And Clamping Logs CAUTION! Be sure the pivot rails, turning arm, clamp, and toe boards are below bed level before loading a log onto the bed. Make sure that the log is placed on the bed in a way precluding destruction of the manual winch during loading Also, be sure the cutting head is moved far enough forward so the log does not hit it.
  • Page 35 SETUP & OPERATION Loading, Turning, And Clamping Logs 4. Lower the turner lever to lower the turner arm below the log. 5. Raise the turner arm to get a new bite on the log. 6. Disengage the clamp. 7. The log can be turned now. Repeat steps 4 through 7 until the log is turned as desired. To Turn Logs (Optional Procedure For Hydraulic Mills Only) If you are turning a small cant on a Super Series mill, you may opt to use the clamp to turn the cant.
  • Page 36 SETUP & OPERATION Loading, Turning, And Clamping Logs To Level A Tapered Log Use the toe board lever(s) to raise either end of a tapered log, if desired. Raise the appropriate lever to raise the front or rear toe board until the heart of the log measures the same distance from the bed rails at each end of the log.

  • Page 37: Up/Down Operation

    SETUP & OPERATION Up/Down Operation Up/Down Operation 1. Install a blade and check for correct blade tension. (See Section 2.4). 2. Set the cutting head to the desired height. (The blade height scale shows the height of the blade above the bed rails.) See Figure 2-7.

  • Page 38: Blade Guide Arm Operation

    SETUP & OPERATION Blade Guide Arm Operation 2.10 Blade Guide Arm Operation 1. The outer blade guide should be adjusted so that it is about 1” (25.4 mm) from the log. 2. If necessary, use the blade guide arm crank to adjust the outer blade guide. Turn the crank clockwise to move the blade guide arm in, counterclockwise to move the arm out.

  • Page 39: Power Feed Operation

    SETUP & OPERATION Power Feed Operation 2.11 Power Feed Operation See Figure 2-9. The power feed system moves the carriage forward and backward by using two switches on the control panel. Carriage Forward Feed Rate Adjustment Carriage Reverse FIG. 2-9 Carriage Feed Rate The carriage feed rate switch controls the speed at which the carriage travels forward.
  • Page 40 SETUP & OPERATION Power Feed Operation The middle position (shown in the figure above) is the neutral position. The power feed switch is designed to return to the neutral position when released. If the switch remains engaged, manually move it to the neutral position. Repair the switch (See Section 4.2).
  • Page 41 SETUP & OPERATION Power Feed Operation blade up. This lets you keep the blade at the current height setting so you can make the next blade height adjustment more quickly. DANGER! Stay clear of the area between the trailer axle and saw carriage.

  • Page 42: Cutting The Log

    Cutting The Log 2.12 Cutting The Log The following steps guide you through normal operation of the Wood-Mizer sawmill. 1. Once the log is placed where you want it and clamped firmly, position the blade close to the end of the log.

  • Page 43: Edging

    1” (25.4 mm) thick boards, lower the carriage 1 1/16 - 1 1/8” (27-28.6 mm) for each board. 2.13 Edging The following steps guide you through edging boards on the Wood-Mizer sawmill. 1. Raise the side supports to ˝ the height of the flitches, or the boards that need to be edged.

  • Page 44: Additional Operation For Super Sawmills

    SETUP & OPERATION Additional operation for Super sawmills 2.14 Additional operation for Super sawmills In order to increase effectiveness of operation, it may be required to leave the blade turned on when returning the saw head. (The standard procedure of sawmill operation requires turning the blade off when returning the saw head, in order to increase the strength of the blade and to save fuel.) CAUTION!

  • Page 45: Blade Height Scale

    SETUP & OPERATION Blade Height Scale 2.15 Blade Height Scale See Figure 2-10. The blade height scale is attached to the cutting head frame. It includes: a blade height indicator metric scale an inch scale. Blade Height Quarter Indicator Scale Inch Scale 3H0007B...
  • Page 46 SETUP & OPERATION Blade Height Scale Example: You want to cut 1” (25 mm) random width boards from a log. Position the blade for the first cut. Move the carriage to an even measurement on the inch scale. Make a trim cut.

  • Page 47: Water Lube Operation

    SETUP & OPERATION Water Lube Operation 2.16 Water Lube Operation See Figure 2-11. The Water Lube System keeps the blade clean. Water flows from a 5-gallon (18.9 liter) bottle through a hose to the blade guide where the blade enters the log.
  • Page 48 SETUP & OPERATION Water Lube Operation when done sawing and store it in a warm place. Blow any remaining water from the water lube hose. To remove water from the water valve in sawmills of the Super series, turn the key to the (#2) position, turn the feed rate dial to the “0”...

  • Page 49: Preparing The Sawmill For Towing

    Preparing The Sawmill For Towing 2.17 Preparing The Sawmill For Towing The Wood-Mizer trailer package makes transporting your sawmill easy and convenient. To get your sawmill ready for towing, follow these instructions. 1. Move the cutting head to the front end of the sawmill. Raise the rear outriggers.
  • Page 50 SETUP & OPERATION Preparing The Sawmill For Towing See Figure 2-12. Safety Chain FIG. 2-12 CAUTION! Check to be sure that the carriage safety chain is secured before towing the sawmill. Failure to properly secure the cutting head can result in severe machine damage.

  • Page 51: Maintenance

    MAINTENANCE Wear Life SECTION 3 MAINTENANCE This section lists the maintenance procedures that need to be performed. The Short Interval Maintenance Schedule lists procedures that need to be performed every 4, 8 or 24 hours. The Maintenance Log lists procedures that need to be performed every 50, 100, 200,or 1000 hours.

  • Page 52: Blade Guides

    MAINTENANCE Blade Guides Blade Guides 1. Check the rollers for performance and wear every blade change. Make sure the rollers are clean and spinning freely. If not, rebuild them. Replace any rollers which have worn smooth or have become cone shaped. See The LT20 Parts manual for blade guide rebuild kits and complete roller assemblies.

  • Page 53: Carriage Track, Wiper & Scrapers

    MAINTENANCE Carriage Track, Wiper & Scrapers Carriage Track, Wiper & Scrapers See Figure 3-2. 1. Clean the upper and lower track rails to remove any sawdust and sap buildup every eight hours of operation. Lubricate the lower track rail by wiping it with Dexron III ATF. 2.

  • Page 54: Vertical Mast Rails

    MAINTENANCE Vertical Mast Rails Vertical Mast Rails Lubricate the vertical mast rails with WD40, clean and wipe them dry every 50 hours of operation. CAUTION! Never use grease on the mast rails as it will collect sawdust. Miscellaneous 1. Apply a thin film of a lithium grease to the blade guide arm to help prevent it from rusting. 2.

  • Page 55: Blade Tensioner

    MAINTENANCE Blade Tensioner Blade Tensioner Grease the tensioner handle screw with a lithium grease every fifty hours of operation, but at least once a week. See Figure 3-3. Tensioner handle screw FIG. 3-3 Blade Wheel Belts 1. Check the blade wheel belts for wear every 50 hours of operation. Replace as needed. 2.

  • Page 56: Brake Pads Adjustment ( Gas / Diesel Sawmills Only )

    MAINTENANCE Brake Pads Adjustment ( Gas / Diesel Sawmills Only ) Brake Pads Adjustment ( Gas / Diesel Sawmills Only ) Check the brake pads for wear every 200 hours of operation. Replace if damaged or worn. Adjust the brake pads if the blade does not stop quickly, unusual sounds occur when the brake is applied, or a sudden change is noticed in the clutch/brake lever position when the clutch is disengaged.

  • Page 57: Drive Belt Adjustment

    MAINTENANCE Drive Belt Adjustment 3.10 Drive Belt Adjustment WARNING! Do not for any reason adjust the drive belts with the motor running. Doing so may result in serious injury. See Figure 3-2. Check the drive belt tension after the first 20 hours, and every 50 hours thereafter.
  • Page 58 MAINTENANCE Drive Belt Adjustment 4. Gas/Diesel Engines Only: Tighten the four mounting bolts. Adjustment Nuts Mounting Bolts FIG. 3-6 DC Sawmills To tighten - turn the bolt clockwise, and to loosen - turn it counter-clockwise. Periodically check the belts for wear. Replace if the belt is damaged or worn. 2530HDSdoc092506 MAINTENANCE...

  • Page 59: Hydraulic System

    MAINTENANCE Hydraulic System 3.11 Hydraulic System 1. Check the hydraulic fluid level every 50 hours of operation. Add fluid as necessary. The level in the hydraulic pump should be 3/4" (19mm) from the top with all cylinders collapsed. If humidity is a problem or the mill is used outside in humid weather, drain and replace two quarts (.95 liters) of fluid every six months.

  • Page 60: Up/Down System

    MAINTENANCE Up/Down System 3.12 Up/Down System 1. Adjust the up/down chain tension as needed. Measure chain tension with the cutting head all the way to the top of the vertical mast. Secure the carriage with a chain at the top, or shim it underneath. Using the adjustment nut shown in Figure 3-8, adjust the chain tension so that there is 1”...
  • Page 61 MAINTENANCE Up/Down System WARNING! Before adjusting, always remove the key from the key switch. Failure to do so may result in serious injury. 3. Loosen the four adjustment bolts shown below. Adjust the belt tension and tighten 20_012 Adjustment Bolts FIG.

  • Page 62: Power Feed System

    MAINTENANCE Power Feed System 3.13 Power Feed System 1. Adjust the power feed chain as needed. WARNING! Always remove the key from the key switch before adjusting the chain. Failure to do so may result in serious injury. See Figure 3-10. Loosen the sprocket nut. To tighten the chain, move the sprocket to the Chain Tension Adjustment Sprocket...
  • Page 63 MAINTENANCE Power Feed System 2. If necessary, align the power feed motor pulley with the gear reducer pulley. UWAGA! WARNING! Remove the key from the key switch before adjusting the pulleys. Failure to do so may result in serious injury. See Figure 3-11.

  • Page 64: Troubleshooting Guide

    Troubleshooting Guide Sawing Problems SECTION 4 TROUBLESHOOTING GUIDE Sawing Problems PROBLEM CAUSE SOLUTION Blades Dull Quickly Dirty logs Clean or debark logs, especially on entry side of the cut When grinding teeth, heating Grind just enough metal to restore too much and causing teeth to sharpness to the teeth.
  • Page 65 Troubleshooting Guide Sawing Problems PROBLEM CAUSE SOLUTION Boards Thick Or Thin On Stress in log which causes log After log has been squared, take Ends Or Middle Of Board. to not lay flat on the bed. equal cuts off opposing sides. Take a board off the top.

  • Page 66: Electrical Problems

    "off" position. Replace drum switch or remove control panel cover and clean and lubricate contacts NOTE: Use only contact grease supplied by Wood-Mizer. Drum switch spring broken. Manually move the power feed or up/down switch back to neutral or "off" position. Replace drum switch spring.

  • Page 67: Power Feed Problems

    Drum switch is dirty. Clean drum switch and lubricate Speeds Or Does Not Move with contact grease supplied by Until Speed Is Above Halfway Wood-Mizer. Mark. Drum switch contacts are bad Check that contacts are in good condition and positively close circuit.
  • Page 68 Troubleshooting Guide Power Feed Problems PROBLEM CAUSE SOLUTION Power Feed Motor Overheats. Middle track oiler is dragging. Clean middle track oiler and lubricate with 30-weight oil or ATF (Automatic Transmission Fluid) such as Dexron II. Allow motor to cool before restarting. Ground is not level.

  • Page 69: Hydraulic Problems

    Troubleshooting Guide Hydraulic Problems Hydraulic Problems PROBLEM CAUSE SOLUTION You Can Actuate Any Carriage not positioned Make sure carriage contact bracket is Hydraulic Handle, But Get No properly to provide power to adjusted far enough forward for battery Response From The Pump. the pump positive contact to touch 6ft.
  • Page 70 Troubleshooting Guide Hydraulic Problems PROBLEM CAUSE SOLUTION Pump Motor Runs With Little Low fluid level Check fluid level. Add an all-season Or No Response From The hydraulic fluid such as Amoco Rycon Cylinders Oil MV or Mobil Multipurpose ATF (automatic transmission fluid) until level is 4 - 4 1/2"...
  • Page 71 Troubleshooting Guide Hydraulic Problems PROBLEM CAUSE SOLUTION Hydraulic Side Supports Go Dirt in sequence valve Remove sequence valves and clean Down Before Or At Same thoroughly with kerosene. NOTE: Be Time As Log Turner sure to reassemble the valve and install it in its original position on the cylinder Retainer in sequence valve...

  • Page 72: Engine/Motor And Drive Pulleys Alignment

    Troubleshooting Guide Engine/Motor and Drive Pulleys Alignment Engine/Motor and Drive Pulleys Alignment 1. Install the drive belt. 2. Use a straight edge to align the engine/motor pulley to the drive pulley. 3. Check front-to-back movement of the engine does not exceed 1/4". Tighten the motor mount U-bolts if necessary.

  • Page 73: Hydraulic Pressure Test

    Troubleshooting Guide Hydraulic Pressure Test Hydraulic Pressure Test CAUTION! Pressure should not exceed 2000 psi. Pressure above 2000 p.s.i. may also damage the hydraulic hoses. Troubleshooting Guide doc092506 4-10...

  • Page 74: Sawmill Alignment

    SECTION 5 SAWMILL ALIGNMENT Pre-Alignment Procedures The Wood-Mizer sawmill is factory aligned. This section includes instructions on how to realign the sawmill completely. Be scrupulous when performing all alignment steps as sawmill alignment determines the accuracy of your cuts. The alignment procedure should be performed approximately every 1500 hours of operation (sooner if you regularly transport the sawmill over rough terrain).

  • Page 75: Frame Setup

    SAWMILL ALIGNMENT Frame Setup Frame Setup Stationary sawmills should be setup on firm, level ground before proceeding with alignment. Portable sawmills should also be setup on firm, level ground. : Adjust the two middle outriggers on the main frame tube down just enough to lift weight from the trailer tire.
  • Page 76 SAWMILL ALIGNMENT Blade Installation And Alignment Electric Sawmills: 1. Turn the key switch to the "H" position. 2. Open the blade housing cover. 3. Manually spin one of the blade wheels until the blade positions itself on the blade wheels. Gas Sawmills: 1.
  • Page 77 SAWMILL ALIGNMENT Blade Installation And Alignment 5. Spin one of the blade wheels by hand until the blade positions itself on the blade wheels. Check the vertical alignment of the idle-side blade wheel. The gullet of the blade should ride the same distance from the front edge of the wheel at the top and bottom of the wheel.
  • Page 78 SAWMILL ALIGNMENT Blade Installation And Alignment See Figure 5-3. The blade wheels should be adjusted so that the gullet of 1 1/4" blades rides 3.0 mm (0.12") out from the front edge of the wheels (± 1.0 mm [0.04"]). The gullet of 1 1/2"...

  • Page 79: Blade Wheel Alignment

    SAWMILL ALIGNMENT Blade Wheel Alignment Blade Wheel Alignment The blade wheels should be adjusted so they are level in the vertical and horizontal planes. If the blade wheels are tilted up or down, the blade will want to travel in the tilted direction.
  • Page 80 SAWMILL ALIGNMENT Blade Wheel Alignment See Figure 5-5. Use the vertical adjustment screws to adjust the drive-side blade wheel. To tilt the wheel, loosen the top adjustment screw one quarter turn. Loosen the jam nut on the bottom adjustment screw and tighten the screw. Tighten the top and bottom jam nuts. To tilt the wheel, loosen the bottom adjustment screw one quarter turn.
  • Page 81 SAWMILL ALIGNMENT Blade Wheel Alignment See Figure 5-6. Use the vertical adjustment screws to adjust the idle-side blade wheel. To tilt the wheel up, loosen the bottom adjustment screw one quarter turn. Loosen the jam nut on the top adjustment screw and tighten the screw. Tighten the top and bottom jam nuts.
  • Page 82 SAWMILL ALIGNMENT Blade Wheel Alignment 9. Check the position of the blade on the idle-side blade wheel. See Figure 5-7. The horizontal tilt of the blade wheel should be adjusted so that the gullet of an 1-1/4" blade is 3.0 mm out from the front edge of the wheel (± 1.0 mm). 150060 3.0 mm ±...
  • Page 83 SAWMILL ALIGNMENT Blade Wheel Alignment 10. Check the position of the blade on the drive-side blade wheel. The blade should be positioned on the wheel as described for the idle-side blade wheel. Adjust the drive-side blade wheel if necessary. See Figure 5-9. Use the horizontal adjustment screw to adjust the drive-side blade wheel.

  • Page 84: Adjusting The Lower Track Rollers

    SAWMILL ALIGNMENT Adjusting The Lower Track Rollers Adjusting The Lower Track Rollers See Figure 5-10. Making these adjustments correctly will give you square cuts and accurate dimensions across the width of your boards 1. Using the power feed switch, move the saw carriage so that the blade is positioned over the front pivot bed rail.
  • Page 85 SAWMILL ALIGNMENT Adjusting The Lower Track Rollers of the blade is 17" (400 mm) above the outside of the pivot rail support by actual measurement with a tape or ruler. See Figure 5-11. 17" (400 mm) to blade SM0137 FIG. 5-11 7.

  • Page 86: Adjusting Bed Rails To The Blade

    SAWMILL ALIGNMENT Adjusting Bed Rails To The Blade See Figure 5-12. Stop Screw FIG. 5-12 Adjusting Bed Rails To The Blade 1. Adjust the front pivot bed rail 90 to the main bed tube. 2. Move the cutting head to center the blade over the front pivot bed rail. 3.
  • Page 87 SAWMILL ALIGNMENT Adjusting Bed Rails To The Blade See Figure 5-13. SM0134 15" (375mm) to blade 15" (375mm) to blade Inner Height Adjustment Outer Height Adjustment Bolt FIG. 5-13 6. Loosen the jam nut and turn the outer height adjustment bolt to adjust the height of the outer end of the pivot rail.

  • Page 88: Blade Guide Arm Vertical Adjustment

    SAWMILL ALIGNMENT Blade Guide Arm Vertical Adjustment 9. Loosen the bed rail clamping bolts and turn the adjustment bolts to move the bed rails to the blade if necessary. 10. Retighten the clamping bolts and adjustment bolts. 11. Without adjusting the cutting head height, check the three remaining main bed rails and the rear pivot rail.
  • Page 89 SAWMILL ALIGNMENT Blade Guide Arm Vertical Adjustment upper outside roller (See step If the arm is too high in the closed position, loosen the upper outside roller and tighten the lower outside roller (See step 6. The rollers are mounted on cam bolts that raise or lower the arm when turned. To adjust the rollers, locate the cam bolt inside the housing and turn until the arm is lowered or raised as needed.

  • Page 90: Carriage Backlash Removal

    SAWMILL ALIGNMENT Carriage Backlash Removal Carriage Backlash Removal Check the carriage for backlash every 200 hours of operation. If necessary, remove the backlash. See Figure 5-16. To check if the backlash is present, grasp the outside part of the FIG. 5-16 sawhead and move it as shown in the figure below.
  • Page 91 SAWMILL ALIGNMENT Carriage Backlash Removal 2. Tighten the two adjustment bolts evenly to remove the backlash. Set Screws Nuts Adjustment Bolts FIG. 5-17 0,1 mm Set Screw Adjustment Bolt FIG. 5-18 3. Tighten the set screws and the nuts. CAUTION! Do not overtighten the adjustment bolts.

  • Page 92: Blade Guide Rope Adjustment

    SAWMILL ALIGNMENT Blade Guide Rope Adjustment Blade Guide Rope Adjustment Adjust the blade guide rope tension when it gets too loose and begins slipping. To do this, use the adjustment nuts shown in Figure 5-19. FIG. 5-19 5-19 doc092506 SAWMILL ALIGNMENT...

  • Page 93: Blade Guide Arm Horizontal Adjustment

    SAWMILL ALIGNMENT Blade Guide Arm Horizontal Adjustment 5.10 Blade Guide Arm Horizontal Adjustment 1. Put the blade guide assembly back in the arm (if you took it out). Put the assembly back so that the flanged collar on the roller is about 3.0 mm (0.04") from the back of the blade when the arm is 15 mm (0.6") from full open.
  • Page 94 SAWMILL ALIGNMENT Blade Guide Arm Horizontal Adjustment See Figure 5-21. Adjustment Nuts Adjustment Nuts SM0066 FIG. 5-21 4. Adjusting the outside two rollers (furthest from the arm motor) inward will cause the flange to move away from the blade. 5. Adjusting the two outside rollers outward will cause the flange to move toward the blade. 6.

  • Page 95: Aligning The Blade Guides

    Aligning the Blade Guides 5.11 Aligning the Blade Guides Each Wood-Mizer sawmill has two blade guide assemblies that help the blade maintain a straight cut. The two blade guide assemblies are positioned on the cutting head to guide the blade on each side of the material being cut.

  • Page 96: Blade Deflection

    SAWMILL ALIGNMENT Blade Deflection 5.12 Blade Deflection Perform the following steps to achieve proper blade deflection with the blade guides. 1. Raise the carriage until the blade is 375 mm (15") above a bed rail. Measure the actual distance with a tape from the top of the rail to the bottom of the blade. 2.

  • Page 97: Blade Guide Vertical Tilt Adjustment

    SAWMILL ALIGNMENT Blade Guide Vertical Tilt Adjustment 5.13 Blade Guide Vertical Tilt Adjustment Check that the blade guide does not tilt the blade up or down. A Blade Guide Alignment Tool (BGAT) is provided to help you measure the vertical tilt of the blade. 1.
  • Page 98 SAWMILL ALIGNMENT Blade Guide Vertical Tilt Adjustment See Figure 5-24. Loosen jam nuts and turn screws to tilt roller up or down SM0070 FIG. 5-24 8. Move the carriage forward so the back end of the tool is over the bed rail. 9.

  • Page 99: Blade Guide Spacing

    SAWMILL ALIGNMENT Blade Guide Spacing 5.14 Blade Guide Spacing HINT: When adjusting blade guide spacing, loosen the top set screw and one side set screw only. This will ensure horizontal and vertical tilt adjustments are maintained when the set screws are retightened. 1.

  • Page 100: Horizontal Tilt Adjustment

    SAWMILL ALIGNMENT Horizontal Tilt Adjustment 5.15 Horizontal Tilt Adjustment 1. Finally, both blade guides must be tilted horizontally. Adjust the blade guide arm halfway See Figure 5-26. FIG. 5-26 2. Place the Blade Guide Alignment Tool against the face of the outer blade guide roller. 3.

  • Page 101: Horizontal Adjustment Of Side Supports

    SAWMILL ALIGNMENT Horizontal Adjustment of Side Supports 5.16 Horizontal Adjustment of Side Supports Logs and boards are clamped against the side supports when sawing. The sides supports must be square to the bed to ensure square lumber. 1. Swing the side support down. 2.

  • Page 102: Vertical Adjustment Of Side Supports

    SAWMILL ALIGNMENT Vertical Adjustment of Side Supports 5.17 Vertical Adjustment of Side Supports 1. Place a flat board across the bed rails. 2. Swing a side support up so that it is vertical. 3. Pull back at the top of the support to eliminate slack as if a log were being clamped against it.

  • Page 103: Saw Head Tilt

    SAWMILL ALIGNMENT Saw Head Tilt 5.18 Saw Head Tilt As the blade enters a wide log or cant, the outside of the saw head will drop down slightly. To compensate for the drop, use the lower track roller horizontal nuts to raise the outside of the saw head 1.5 mm (0.06").
  • Page 104 SAWMILL ALIGNMENT Saw Head Tilt See Figure 5-30. Blade 375 mm + 1 mm 375 mm + 1 mm Bed Rail Sm0064-1 FIG. 5-30 5-31 doc092506 SAWMILL ALIGNMENT...

  • Page 105: Blade Height Scale Adjustment

    SAWMILL ALIGNMENT Blade Height Scale Adjustment 5.19 Blade Height Scale Adjustment After the entire sawmill has been aligned and all adjustments made, check that the blade height scale indicates the true distance from the blade to the bed rails. 1. Move the saw head so the blade is positioned directly above one of the bed rails. Measure from the bottom edge on a down-set tooth of the blade to the top of the bed rail (or stainless steel sleeve if applicable).

This manual is also suitable for:

Lt20 e15Lt20sg15Lt20mg15Lt20le15

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