Precision matthews PM 728V-T Manual Download

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PM 728V-T v2 2020-10

Model PM 728V-T Precision Milling Machine

Square column design, heavy cast iron construction

High weight-to-size factor: 370 lb excluding stand

1 HP (750W) brushless dc motor, 110 Vac single phase power

Quiet belt drive, no gears

Variable spindle speed from 100 to 4000 + rpm

Table size 7" x 28"

One-shot lubrication system standard

Quill DRO for precise downfeed measurement

PM-728V-T with optional stand

Summary of Contents for PM 728V-T

Page 1: ...vy cast iron construction High weight to size factor 370 lb excluding stand 1 HP 750W brushless dc motor 110 Vac single phase power Quiet belt drive no gears Variable spindle speed from 100 to 4000 rp...

Page 2: ...fications or misuse This manual describes PM 728V T machines as shipped from early 2020 There may be detail dif ferences between your specific machine and the information given here with little or no...

Page 3: ...nch or stand firmly to the floor Check working clearances Section 2 1 If the handwheels were shipped loose install the largest of the four at the top of the column The three smaller handwheels are for...

Page 4: ...tool to retrieve reposition T bolts Headstock removal 1 Assemble a stack of 2 x 4s as Figure 1 4 Lower and lock the quill so that the spindle nose rests on the front 2 x 4 this is for balance not for...

Page 5: ...then progressively increase the speed to the maximum about 1500 rpm 9 Check the emergency function by pressing the E Stop button This should disable the power circuit stopping the spindle You will hea...

Page 6: ...eep groove ball bearings enclosed in a robust quill with coarse drilling and fine milling downfeed options It is powered by a 1 HP 750 W brushless dc motor Spindle speed is continuously variable from...

Page 7: ...O With full way support 7 3 4 in Between hard stops 9 1 2 in No DRO 8 1 2 in 10 in Left right travel X axis With full way support 17 3 4 in Between hard stops 19 in Leadscrew pitch both axes 10 TPI 0...

Page 8: ...e the work area is properly lit Never leave chuck keys wrenches or other loose tools on the machine Be sure the workpiece and machine ways are secure before commencing mill ing or drilling hold downs...

Page 9: ...ockwise look ing down Figure 3 2 Belt adjustment SPINDLE SPEEDS The PM 728V T is a belt driven machine with two speed rang es L 100 1500 rpm and H 300 4000 rpm To select a speed range disconnect power...

Page 10: ...the spindle bore by an M4 x 6 mm long set screw If it is difficult or impossible to insert the R8 device chances are the set screw is in too far Rotate the spindle by hand to expose the screw Figure 3...

Page 11: ...two headstock attachment nuts Figure 3 7 X axis handwheel dial right hand Figure 3 8 Y axis handwheel dial Figure 3 9 Z axis handwheel dial LOCKING THE AXES Before machining a workpiece it is usually...

Page 12: ...drives sleeve 3 through a worm gear If clamp knob 4 is unscrewed both 2 and 3 rotate freely doing nothing to the quill Fine feed is engaged by tightening knob 4 to clamp 3 and 1 together The depth di...

Page 13: ...s handwheel to prevent rotation zero the Y dial 7 Raise the quill then rotate the handwheel one exact full turn counter clockwise 0 1 to bring the reference edge to the spindle centerline 8 Rotate the...

Page 14: ...olli sion when sweeping 9 Reposition the 1 2 3 block to the opposite location on the table Figure 3 19 Shop made indicator holder Tramming calls for patience Expect to tighten and re check several tim...

Page 15: ...e lock but you need to make sure that the spindle does not rotate throughout the procedure it helps if the low spindle speed is selected Set the indicator tip against the upper edge of a precision ref...

Page 16: ...no oil but use the recommended lubri cants when you can GIB ADJUSTMENT Gibs on the X Y and Z axes control the fit of the mating dove tailed surfaces They are gently tapered lengths of ground cast iron...

Page 17: ...ne attention If the bearings need to be serviced or replaced remove the quill spindle assembly as follows IMPORTANT Use wood blocks or other means to protect the table and to prevent unexpected downwa...

Page 18: ...voltage motor is running Three beeps Overload Four beeps Over heating Five beeps Over voltage Six beeps Over current Seven beeps EEPROM error WARNINGS Long beeps Possible cause Note Two beeps Bus volt...

Page 19: ...19 PM 728V T v2 2020 10 Copyright 2020 Quality Machine Tools LLC Model PM 728V T HEADSTOCK SPINDLE Fig 2 There may be detail differences between this representative drawing and the machine as supplied...

Page 20: ...spring Z5993 33 Clamp knob Z5994 34 Lever knob Z5995 35 Handle lever Z5996 36 Pinion shaft hub Z5997 37 O ring Z5998 38 Spindle spline block Z5999 Ref Description Part 39 Ball bearing 6005ZZ Z6000 40...

Page 21: ...21 PM 728V T v2 2020 10 Copyright 2020 Quality Machine Tools LLC Model PM 728V T TABLE COLUMN Fig 3 There may be detail differences between this representative drawing and the machine as supplied...

Page 22: ...crank shaft Z6063 133 Hand wheel Z6064 134 Thrust bearing 51102 Z6065 135 Z axis leadscrew Z6066 136 Leadscrew nut Z6067 137 Machine base Z6068 138 Table Z6069 139 Movable stop sleeve Z6070 Ref Descr...

Page 23: ...switch Z6109 806 Limit switch Z6110 807 Controller PCB Z6111 808 Cable bushing Z6112 809 Electrical box Z6113 Ref Description Part 810 Cable bushing Z6114 811 Connector mount Z6115 812 E stop button Z...

Page 24: ...andle Z6126 215 Chip pan Z6127 216 Rear panel Z6128 217 Side panel Z6129 913 Washer Z6130 Ref Description Part 917 Washer Z6131 948 Hex screw M8 x 100 Z6132 949 Nut M8 Z6133 950 Hex screw M8 x 20 Z613...

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