Precision matthews PM-727M Manual

Precision milling machines

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Manual (9 pages)

Table Of Contents

Table of Contents

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Tachometer

Speed

control

Power

Stop

Spindle

switch

spindle

direction:

(OFF)

Forward/

Reverse

Model PM-727V (brushless dc motor)

PM-727MV v6 2020-10

Models PM-727M & PM-727V

Precision milling machines

PM-727M 6-speed gear head (6 set speeds)

PM-727V 6-speed gear head (6 speed ranges,

infinitely adjustable speed in each range)

Quill DRO for precise downfeed measurement

Square column design, dovetail ways

Heavy cast iron construction

Optional steel stand & cabinet

Weight including stand 575 lbs

Model PM-727M (ac induction motor)

110Vac power

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Summary of Contents for Precision matthews PM-727M

Page 1 Models PM-727M & PM-727V Precision milling machines PM-727M 6-speed gear head (6 set speeds) PM-727V 6-speed gear head (6 speed ranges, infinitely adjustable speed in each range) Tachometer Speed 110Vac power control Quill DRO for precise downfeed measurement Square column design, dovetail ways Heavy cast iron construction Optional steel stand &...
Page 2 Left, Reverse = Right). This manual contains essential safety advice on the proper setup, operation, maintenance, and service of the PM-727M and PM-727V mills. Failure to read, understand and follow the manual may result in property damage or serious personal injury.
Page 3: New Installation
New installation? These are the points to watch out for! But read the whole manual for specifics After uncrating the mill, please pay attention to the following: • Handling the mill is at least a two-man job. • Read the installation instructions, Section 2 of this manual. •...
Page 4: Section 1 Features & Specifications
DRO, completely independent of headstock up/down position. The main difference between M and V models is the motor — single speed ac (induction type) for PM-727M, variable speed (brushless dc) for the PM-727V. The V model offers a significantly wider speed range than the M model, 40-3000 rpm vs. 115- 1700 rpm.
Page 5 It was written before the PM-727V became available. Unless otherwise noted, all descriptions, suggestions and instructions apply equally to both PM-727M and PM-727V machines. They are identical in all respects other than the motor, single speed for the M model, variable for the V.
Page 6 Everyday precautions • This machine is designed for milling and drilling operations by experienced users familiar with metal-working hazards. • Untrained or unsupervised operators risk serious injury. • Wear ANSI-approved full-face or eye protection at all times when using the machine (everyday eyeglasses are not reliable protection against flying particles).
Page 7: Section 2 Installation
Figure 2-2. 9. Secure the mill to the bench or stand. If this is a The PM-727M is shipped in two packing cases, one stand installation, use the four bolts supplied. The for the machine, one for the optional stand. The follow- front two bolt locations are threaded.
Page 8: Test Run Procedure
The power lamp should light. PM-727V USERS PLEASE NOTE ... 4. Check the emergency function by pressing the E- SPEED RANGES (rpm) Stop button. The power lamp should go out, de-en- ergizing the contactor circuit, disabling all electrics. L1 40-190 If this doesn’t happen, the E-stop func- L2 180-380 tion is defective, and needs attention...
Page 9: Section 3 Using The Mill
Section 3 USING THE MILL FRONT PANEL CONTROLS both stages are properly engaged. Hand-rotate (jiggle) the spindle forward and back while applying light pres- Connect the mill to a 110Vac outlet. Press the Power sure on each gear-shift knob, listening for the click as lamp switch, top center Figure 3-1, to energize the the gears engage.
Page 10: Moving The Table
splined spindle. Fully tighten the drawbar. To remove: Protect the table under the spindle with rags or scrap wood. Loosen the drawbar one half turn or less — holding the spindle with a wrench if necessary — then tap the top of the drawbar with a brass or dead- blow hammer to unseat the taper.
Page 11 QUILL DOWNFEED including the heavier knee mills, locking the quill may offset the spindle by a few thousandths of an inch. If The quill is controlled in two different ways, coarse and the edge of the workpiece has been “found” in the quill- fine.
Page 12: Tapping Operations
QUILL DRO attachment. The drill chuck can be used instead for siz- The quill DRO is in metric mode when switched on. es up to (say) M6 or 1/4”, beyond which the chuck may Press the mm/in button to display inches. By pressing not grip tightly enough to avoid slippage.
Page 13 – the paint seal may let go without warning. (First-time Tramming is done by fine-tuning the headstock tilt an- tilting may also call for unusual effort on the wrench.) gle. Tram is typically checked by attaching a dial indica- tor to some form of “sweepable” holder installed in the Set the headstock to the desired angle by reference to spindle, the aim being to adjust tilt for the same reading the tilt scale on the headstock base casting, then re-...
Page 14 INSTALLING & INDICATING A VISE 5. Remove the vise, if installed, and clean the table surface. If there are noticeable grooves or dings, For routine milling operations the workpiece is held in a flatten the surface with a diamond lap or fine-grit precision vise.
Page 15 There is no “right” setup for a vise, but as a starting point aim for an indicator difference of no more than ± 0.001” over the width of the jaw. VISE KEYS Most precision vises come with key slots on the un- derside machined exactly parallel to the fixed jaw.
Page 16: Section 4 Maintenance
Section 4 MAINTENANCE Remove all machining debris and foreign ob- Unplug the 110V power cord before any jects before lubricating ANYTHING! If need be, maintenance operation! any oil is better than no oil – but use the recom- mended lubricants when you can. LUBRICATION ISO and SAE are the main indexes of viscosity.
Page 17: Gib Adjustment
Overheating can be due to excessive grease, see above, or an over- tight spanner nut at the upper end of the spindle. Call Precision Matthews for guidance. LEADSCREW BACKLASH CORRECTION When alternating between clockwise and counter clock-...
Page 18 Figure 4-6 Y-axis backlash adjustment Figure 4-5 X-axis backlash adjustment DOWNFEED RETURN SPRING TENSION The quill should automatically retract when the coarse downfeed levers are released following a drilling opera- tion. If not, the return spring may need to be re-tensioned –...
Page 19: Section 5 Parts
Section 5 PARTS MOTOR CONTROLS Power Press once to energize, press again to de-energize. Left = Spindle Forward = clockwise looking down on mill table Right = Spindle Reverse = counter- clockwise Off = Stop motor E-Stop Emergency disconnect (stays in until turned counter-clockwise to release) PM-727MV v6 2020-10...
Page 21 COLUMN COMPONENTS Fig 2 There may be detail differences between this representative drawing and the machine as supplied Ref Description Part Ref Description Part Ref Description Part Column Z5759 Screw:M6x20 skt hd (4) Z5772 Screw:M6x16 skt hd (3) Z5785 Headstock base Z5760 Key (2) Z5773...
Page 22 BASE & MILL TABLE COMPONENTS Fig 3 There may be detail differences between this representative drawing and the machine as supplied Copyright © 2020 Quality Machine Tools, LLC PM-727MV v6 2020-10...
Page 23 BASE & MILL TABLE COMPONENTS Fig 3 Ref Description Part Ref Description Part Base Z5796 Y-axis gib Z5816 Gib screw (4) Z5797 Position indicator block Z5817 X-axis gib Z5798 Y-axisclamp lever (2) Z5818 Saddle Z5799 Screw: M8 x 50 skt hd Z5819 Dowel pin, 6 x 12 (4) Z5800...
Page 24 HEADSTOCK CASE COMPONENTS Fig 4 There may be detail differences between this representative drawing and the machine as supplied All dimensions in mm Ref Description Part Ref Description Part Ref Description Part Screw: M6 x 8, set (2) Z5836 Coil spring, quill return Z5850 Screw: M6 x 8, set (2) Z5863...
Page 25 HEADSTOCK DRIVE COMPONENTS Fig 5 There may be detail differences between this representative drawing and the machine as supplied PM-727MV v6 2020-10 Copyright © 2020 Quality Machine Tools, LLC...
Page 26 HEADSTOCK DRIVE COMPONENTS Fig 5 Ref Description Part Ref Description Part Retaining ring: 62, int Z5876 Ball, 6.5 Z5908 Bearing housing Z5877 Compression spring Z5909 Retaining ring: 35, ext Z5878 Gear, 46T Z5910 Ball bearing: 6007 (2) Z5879 Key, 5 x 16 Z5911 Gear: 57T Z5880...
Page 29 QUILL FEED COMPONENTS Fig 7 There may be detail differences between this representative drawing and the machine as supplied All dimensions in mm Ref Description Part Ref Description Part Quill pinion shaft Z5939 Screw: M4 x 7, skt hd (3) Z5951 Gear housing Z5940...

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Precision matthews PM-727M Manual

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