Powermatic DDS-237, DDS-225 Pressure Rollers, Table Height, Table Parallelism

Pressure Rollers

The pressure rollers (Fig. 15) maintain tension upon the workpiece as it passes through the machine. The spring tension of the pressure rollers has been factory set. If a board refuses to pass through the machine, or the finished surface of a board is uneven, the spring tension of the pressure rollers may need adjusting.

1.Loosen the hex nut (A, Fig. 15).

2.Place a 17mm wrench over the flat on the adjusting screw (B, Fig. 15) and lower the screw to increase the roller pressure on the workpiece; or raise the screw to decrease the pressure.

3.Retighten hex nut (A, Fig. 15).

4.Repeat this same adjustment at the opposite end of the roller to maintain parallel.

5.Repeat procedure for other two pressure rollers.

Do not over tighten the adjusting screw, as excess roller pressure will prevent the workpiece from passing through the machine, and may cause the conveyor belt to stop.

Table Height

Rotate the handwheel until the depth gauge (Fig. 16) reads the appropriate depth. One revolu- tion of the handwheel moves the table approxim- ately 0.11”.

A limit plate (Fig. 16) is mounted to the front of the sander. If the table has been set too high, the workpiece will contact this plate and a limit switch will shut off the conveyor table. If this happens, re- position the table and restart the machine.

Table Parallelism

The conveyor table has been set parallel to the drums at the factory. If the conveyor table should ever need adjusting to bring it back into parallel with the drums, proceed as follows:

1.Remove the front cover plate below the table to expose the chain. Also remove the rear cover plate.

2.Loosen the socket head cap screw on the chain tensioner (Fig. 17) and slide the chain tensioner assembly forward to slacken the chain.

3.Remove the chain from around all four sprockets.

12

Figure 15

Figure 16

Figure 17