M1001 6" x 26" Vertical Mill
Adjusting Backlash
Backlash is the amount of play found in a leadscrew. It can be found by turning the cross slide handwheel in one direction, and then turning the handwheel the other direction. When the cross slide begins to move, the backlash has been taken up.
Leadscrews are adjusted for backlash at the factory and should not need any adjustment for many hours of machine use, if ever. Keeping a clean and well lubricated machine will ensure long leadscrew life.
To adjust the backlash, do these steps:
Longitudinal Feed Adjustment
1.Slightly tighten the two cap screws on the longitudinal nut (see Figure 32). DO NOT overtighten.
2.Rotate the handwheel in both directions to see if backlash has been reduced or eliminated. There should only be a slight drag when turning the handwheel.
Note: If the cap screws are too tight, it will cause excessive wear to the longitudinal nut and leadscrew, which could lead to costly repairs.
Crossfeed Adjustment
1.Slightly tighten the two cap screws on the cross nut (see Figure 33). DO NOT overtighten.
2.Rotate the handwheel in both directions to see if backlash has been reduced or eliminated. There should only be a slight drag when turning the handwheel.
Note: If the cap screws are too tight, it will cause excessive wear to the cross nut and leadscrew, which could lead to costly repairs.
SERVICE
Adjustment Cap Screws |
Longitudinal Nut |
Figure 32. Longitudinal nut.
Cross Nut |
Adjustment Cap Screws |
