Brake & Switch
As the brake lining wears, the foot pedal develops more travel. If the brake band is not adjusted to compensate for normal wear, the limit switch will still turn the lathe OFF, but the spindle will not stop as quickly. It is especially important that the brake is kept properly adjusted so you can quickly stop the spindle in an emergency.
Tools Needed: | Qty |
Wrench 17mm | 1 |
Hex Wrench 8mm | 1 |
Adjusting Brake
1.DISCONNECT LATHE FROM POWER!
2.put on a respirator and eye protection to pro- tect yourself from hazardous brake dust.
3.open the
4.Measure the remaining brake band lining at the thinnest point, which is usually at the 8 o'clock position, as shown in Figure 136.
1mm
Figure 136. Minimum brake belt thickness.
Note: When the brake band is new, the lining is approximately 4mm thick. If the lining thick- ness wears to 1m or less, the brake band must be replaced.
5.Adjust the hex nuts on the pedal bolt shown in Figure 137 to tighten the brake band so there is approximately 1⁄8" clearance between the pad and hub around its circumference.
| Pedal Bolt |
| Pedal |
| Lever |
1⁄8" | Hex |
Nuts | |
| Cap Screw |
Figure 137. Brake tensioning components.
—If additional brake band tension is needed, loosen the cap screw shown in Figure 137, pivot the pedal lever to the right and tighten the cap screw.
6.Close the end-gear cover, connect the lathe to power, then test the brake pedal as follows:
a.Start the lathe, then lightly press the foot pedal. The motor should shut OFF.
b.Push the foot pedal down further to stop spindle rotation. You should not need to press the pedal down completely to stop the spindle, nor should the spindle keep rotating. If either symptom occurs, repeat Steps 5–6 until you are satisfied with the brake performance.
Model G0746/G0749 (Mfg. Since 3/13) |
