Leadscrew Backlash Adjustment; Coolant System Repair - Acer Dynamic 1722S Operation Manual

7-7 Brake & Micro Switch Adjustment
The foot brake is connected with a micro switch. It should have 0-
1mm end play between the brake arm and lever head of the micro switch.
The correct brake action should cut off the electricity first, and then stop
stepping on the brake to avoid the brake belt being worn out.
After stepping on the foot brake, customer needs to lift the spindle
control lever to make the spindle rotate again.

7-8 Leadscrew Backlash Adjustment

If multiple cutting is happened while threading, it is caused by the leadscrew backlash. To adjust
the leadscrew half nut properly, open the plastic cover of the leadscrew bracket and loosen nut ○
Then tighten the left side nut ○
nut by hand, turn the apron handwheel forward and reverse to feel the connecting section of the
gear box and leadscrew until no backlash has been sensed.) Afterwards, put back the nut
to the leadscrew bracket.
○ A

7-9 Coolant System Repair

If there is no coolant coming out after the pump switch is turned on, please check the pump
motor is working or not. If yes, check and see if the coolant in the tank is filled to the pump level or
not. If not, please add more coolant, and then turn on the switch again. If there is still no coolant,
the pump must be blocked or damaged. Please take off the pump to clean or repair.
until there is no backlash.
B
41
Fig. 7-7
(For testing, press down the half
○
A
○
B
Figure 7-8
.
A