Powermatic WB-43, WB-37, WB-25 operating instructions Table Parallelism

Page 17

If the ends of the workpiece are sniped, the front pressure bars are too low. The pressure should be enough to firmly hold the workpiece against the conveyor, but not so hard that the ends of the workpiece spring up after clearing the bar.

Also, if the ends of the bars are not exerting equal pressure, the workpiece will tend to move sideways on the conveyor during sanding.

To raise or lower each set of pressure bars:

1.Disconnect sander from power source.

2.The sanding belt should be installed, and the air valve turned ON.

3.Place a sanded panel with even thickness on the conveyor table and under the pressure bars. The panel should be long enough to contact both front and back sets of pressure bars.

4.Raise the table manually using the handwheel (Figure 16) until the panel contacts the pressure bars.

5.Make sure the pressure at the right and left side of pressure bars is even.

6.If adjustment is needed, release the lock nut (A, Figure 17) with a 14mm wrench.

7.Insert the adjusting tool (B, Figure 17) into a hole in the adjusting knob. Rotate the adjusting knob clockwise to raise that side of the pressure bar, counterclockwise to lower it.

8.When finished, re-tighten lock nut (A, Figure 17).

9.11Table Parallelism

Parallelism of the conveyor table to the contact roller has been factory-set and should not require further adjustment. However, as the machine receives extended use, this setting should be checked.

Inspect parallelism by one of two methods:

1.Use a sanded board of equal thickness. Pass the board several times through the machine at a sanding depth of approximately 1/64”, then measure the thickness of the board at different points along the edges with calipers. If excessive variation occurs, the table needs adjusting.

OR, remove the sanding belt and place a gauge of some kind at one side of the conveyor table and below the contact roller. Raise the table manually using the handwheel until the gauge just touches the contact roller. Repeat at the other side of the table and compare the gauge readings.

Figure 16

Figure 17

17

Image 17

Contents Wide Belt Sanders Warranty Period Warranty and ServiceTable of Contents Pressure Bar Assembly Models WB-25, WB-37, WB-43 16.8.2 Safety warnings Safety warnings 1790843 Introduction SpecificationsUnpacking Contents of Shipping ContainerDust Collection AssemblyAir Supply Connection Grounding Instructions Installing/Replacing Sanding BeltElectrical Model WB-25 shown 230 Volt Operation460 Volt Conversion AdjustmentsExtension cords Sanding Belt Tracking OscillationOscillation Speed Oscillation Air Flow Replacing Graphite and Felt Pad Belt Tension and Replacement Platen Position Conveyor Belt Tracking Conveyor Belt TensionFeed Rate Pressure Bar AdjustmentTable Parallelism LED Controller and Keypad Operating ControlsAmperage Meter Braking System OperationDust Port Layout MaintenanceTrouble Troubleshooting the SanderTrouble Replacement Parts Troubleshooting the LED UnitBase and Motor Assembly Model WB-25 only Index No. Part No Description Size Qty Parts List Base and Motor Assembly Model WB-25Base 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-43 Parts List Upper Cabinet Assembly Model WB-37Table 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 WB25-IRA Parts List Table and Conveyor Belt Assembly Model WB-25WB37-IRA Parts List Table and Conveyor Belt Assembly Model WB-37WB43-IRA Parts List Table and Conveyor Belt Assembly Model WB-43Parts List Pressure Bar Assembly Model WB-25 Pressure Bar Assembly Models WB-25, WB-37, WB-43Parts List Pressure Bar Assembly Model WB-43 Parts List Pressure Bar Assembly Model WB-37Parts List Platen Assembly Model WB-25 Platen Assembly Model WB-25 only6290294 Parts List Platen Assembly Model WB-37 Platen Assembly Models WB-37, WB-43Parts List Platen Assembly Model WB-43 WB43-717 Parts List Air Regulator Assembly Model WB-25 Air Regulator Assembly Models WB-25, WB-37, WB-43Parts 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 Models WB-25 and WB-37 only Electrical ConnectionsModel WB-43 only