W1751 25"
Using the Platen
The adjustable platen and dial (Figure 17) allows you to achieve different results from your sander. The three possible platen positions are as follows:
Platen Up — The platen is moved above the sanding roll- ers. The rollers then act like a drum sander and allow for increased stock removal. In this position, the ideal belt grit is #100 or coarser. The scratch pattern in this mode will be short and deep, relative to grit size.
Platen Even — The platen is set even with the sanding rollers. The rollers act together with the platen pressure to achieve intermediate or final finishing. In this posi- tion, the ideal belt grit is between #100 and #180. The scratch pattern in this position is moderate, relative to grit size.
Platen Down — The platen is moved below the sanding rollers. With the platen down, the workpiece contact with the sandpaper is only made at the platen. This posi- tion is used for fine finishing, sanding repairs, or sanding lacquer. The ideal belt grit is #180 or finer. Generally sanding with the platen down will remove 0.004" or less. The scratch pattern in this position will be long and shal- low, relative to grit size.
Figure 17. Platen control.
Basic Sanding
The maximum depth of cut is 1⁄64" or 1⁄8th of a turn of the handwheel. Attempting to remove too much material can cause workpiece burning, premature paper wear, paper tearing, motor stall and capacitor burnout.
To sand a workpiece, do these steps:
1.Read this manual, and take all safety precautions outlined in it.
2.Put on safety glasses and a respirator, and tie up out
3.Start the dust collector.
4.Measure the thickness of your workpiece.
5.Rotate the table height handwheel until the sanding depth is slightly higher than your workpiece. This first pass takes off any high spots in your workpiece.
6.Turn on the sander, conveyor, and air
Tip
For best results when finish sanding, feed each piece through the sander two or three times without adjusting the depth of cut. Turn the workpiece 180˚ and feed it through two or three more times at this same depth. As always, use your best judgement. If you no longer hear the sanding belt making contact with the workpiece on successive cuts, then no further passes are needed at that depth.
OPERATIONS