Powermatic WB-43 Platen Position, Replacing Graphite and Felt Pad, Belt Tension and Replacement

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9.4Platen Position

The sander has a removable platen with a graphite strip and a felt pad to reduce friction against the sanding belt. Positioning of the platen depends upon the type of wood being used.

The height of the platen is set at the factory, but can be re-adjusted by rotating the platen adjustment knob (Figure 10). Each mark on the scale indicates a raising or lowering measurement of 0.005mm. One complete rotation of the scale moves the platen 0.2mm or approximately 8/1000 of an inch.

Theoretically, optimum finish sanding results are obtained when the bottom of the platen extends slightly below the bottom of the conveyor rollers. The main consideration in adjusting the platen is to make sure that both ends are symmetrical and level.

NOTE: The platen must be kept clean. After sanding, if the workpiece has straight notches across it, the graphite and felt pad have worn out and should be replaced immediately.

9.5Replacing Graphite and Felt Pad

To replace the graphite strip and felt pad, proceed as follows:

1.Remove the lock screw (B, Figure 3) and the spacer block (C, Figure 3).

2.Place the platen pull hook into the hole on the end of the platen and pull out the lower portion of the platen assembly, as shown in Figure 10. NOTE: The platen is tightly fitted and will require a firm pull with the pull hook.

3.Note carefully how the current graphite and felt strip are mounted. Replace them with the new ones.

4.Re-install the platen by aligning the end of it with the dovetail track on the fixed portion of the platen assembly, and push it all the way in using the pull hook.

5.Replace the spacer block and lock screw.

9.6V-Belt Tension and Replacement

For the first few days of operation a new belt should be checked occasionally and adjusted for tension as necessary until the belt is properly “worn in.”

The v-belts on the main motor and table elevating motor should be checked for proper tension.

Tighten any of the v-belts as follows:

Figure 10

Figure 11

Figure 12

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Contents Wide Belt Sanders Warranty and Service Warranty PeriodTable of Contents Pressure Bar Assembly Models WB-25, WB-37, WB-43 16.8.2 Safety warnings Safety warnings Introduction Specifications 1790843Contents of Shipping Container UnpackingDust Collection AssemblyAir Supply Connection Grounding Instructions Installing/Replacing Sanding BeltElectrical 230 Volt Operation Model WB-25 shownExtension cords Adjustments460 Volt Conversion Sanding Belt Tracking OscillationOscillation Air Flow Oscillation SpeedReplacing Graphite and Felt Pad Belt Tension and ReplacementPlaten Position Conveyor Belt Tension Conveyor Belt TrackingPressure Bar Adjustment Feed RateTable Parallelism LED Controller and Keypad Operating ControlsAmperage Meter Operation Braking SystemMaintenance Dust Port LayoutTroubleshooting the Sander TroubleTrouble Troubleshooting the LED Unit Replacement PartsBase and Motor Assembly Model WB-25 only Parts List Base and Motor Assembly Model WB-25 Index No. Part No Description Size QtyBase and Motor Assembly Model WB-37 only Parts List Base and Motor Assembly Model WB-37 Base and Motor Assembly Model WB-43 only Parts List Base and Motor Assembly Model WB-43 Upper Cabinet Assembly Model WB-25 only Parts List Upper Cabinet Assembly Model WB-25 Upper Cabinet Assembly Models WB-37, WB-43 Parts List Upper Cabinet Assembly Model WB-37 Parts List Upper Cabinet Assembly Model WB-43Table Raising Assembly Models WB-25, WB-37, WB-43 Parts List Table Raising Assembly Model WB-25 Parts List Table Raising Assembly Model WB-37 Parts List Table Raising Assembly Model WB-43 Hex Screw 12x4 Table and Conveyor Belt Assembly Models WB-25, WB-37, WB-43 Parts List Table and Conveyor Belt Assembly Model WB-25 WB25-IRAParts List Table and Conveyor Belt Assembly Model WB-37 WB37-IRAParts List Table and Conveyor Belt Assembly Model WB-43 WB43-IRAPressure Bar Assembly Models WB-25, WB-37, WB-43 Parts List Pressure Bar Assembly Model WB-25Parts List Pressure Bar Assembly Model WB-37 Parts List Pressure Bar Assembly Model WB-43Platen Assembly Model WB-25 only Parts List Platen Assembly Model WB-256290294 Platen Assembly Models WB-37, WB-43 Parts List Platen Assembly Model WB-37Parts List Platen Assembly Model WB-43 WB43-717 Air Regulator Assembly Models WB-25, WB-37, WB-43 Parts List Air Regulator Assembly Model WB-25Parts List Air Regulator Assembly Model WB-37 Parts List Air Regulator Assembly Model WB-43 Sanding Belt and Accessories Models WB-25, WB-37, WB-43 Parts List Sanding Belt and Accessories Model WB-43 Parts List Sanding Belt and Accessories Model WB-25Parts List Sanding Belt and Accessories Model WB-37 Tension Roller Assembly Models WB-25 and WB-37 only Parts List Tension Roller Assembly Model WB-25 Parts List Tension Roller Assembly Model WB-37 Seal Tension Roller Assembly Model WB-43 only Parts List Tension Roller Assembly Model WB-43 WB43-163 Electrical Box Assembly Models WB-25 and WB-37 Parts List Electrical Box Assembly Model WB-25 Parts List Electrical Box Assembly Model WB-37 Electrical Box Assembly Model WB-43 only Parts List Electrical Box Assembly Model WB-43 Electrical Connections Models WB-25 and WB-37 onlyModel WB-43 only