Pressure Roller | |
Height |
|
Tools Needed: | Qty |
Hex Wrench 4mm | 1 |
Wrenches/Sockets 14mm | 2 |
Gauge Blocks (see Page 30) | 2 |
Factory Setting: |
|
Distance Below Rear Drum | 0.160" (4mm) |
The pressure rollers are factory set at 0.160" (4mm) below the bottom of the rear sanding drum and are fully adjustable either up/down with the two nuts shown in Figure 39. After the adjust- ment has been made, always lock the top hex nut against the bottom to prevent it from moving.
Figure 39. Pressure roller adjustment hex nuts.
Proper pressure on the workpiece helps avoid kickback and keeps the workpiece from slip- ping. However, as pressure increases on the workpiece, snipe also increases (snipe is normal with all brands of drum sanders).
If snipe becomes a problem, you can minimize it by reducing pressure (raising pressure roller height). However, you can only minimize it so much before the workpiece will slip or kick out, causing a hazard to the operator. If this happens, you have raised the pressure rollers too high for them to function as intended—the pressure rollers MUST be lowered to prevent injury.
Note: An additional trick for eliminating snipe is to reduce pressure on the rear rollers, but not the front rollers. Conditions will vary with wood types, so use
These instructions will restore the pressure rollers to the factory setting.
To adjust the pressure rollers to the factory setting:
1.Disconnect power to the sander!
2.Open the top cover.
3.Place the gauge blocks on the conveyor table and position them under all the pressure roll- ers, as shown in Figure 40.
Figure 40. Gauge blocks in position for
adjusting the pressure roller height.
4.Adjust the conveyor table up so the gauge blocks just touch the rear drum roller.
5.Rotate the handwheel eight full turns, count- ing from the point of actual table movement so handwheel freeplay does not affect your count.
6.With all the rollers: 1) Raise one end off the gauge block and move it back down until it just touches the gauge block; 2) repeat with the other side; 3) tighten the hex nuts togeth- er to make sure the adjustments are locked in place.
G0449/G0450 37" Drum Sander |