Model G0740 (Mfg. Since 11/12) -29-
15. stand away from all the exposed gears on
the side of the headstock, and attempt to
start spindle rotation. the spindle should not
start.
— if spindle rotation does start with the end
cover removed, the safety switch is not
operating correctly. this safety feature
must operate properly before continuing
operation. press the stop button to turn
the lathe OFF, disconnect it from power,
and call tech support for help.
16. push the stop button in, move the spindle
lever to the oFF position, then replace the
end gear cover.
17. lift the chuck guard up—this will activate the
chuck guard safety switch. reset the stop
button and attempt to start spindle rotation.
the spindle should not start.
— if spindle rotation does start with the chuck
guard in the up position, the safety switch is
not operating correctly. this safety feature
must operate properly before continuing
operation. press the stop button to turn
the lathe OFF, disconnect it from power,
and call tech support for help.
18. use the cutting fluid pump switch on the con-
trol panel to start the pump, then open the
valve. Verify that the cutting fluid flows from
the nozzle, turn the pump OFF, then move
the spindle lever to the oFF position.
Congratulations! the test run is complete. turn
the lathe OFF and perform the following Spindle
break-In procedure.
After the first 16 hours of use, the v-belts
will stretch and seat into the pulley grooves.
The v-belts must be properly re-tensioned
after this period to avoid reducing their
useful life. Refer to the v-belts subsec tion
on Page 79 for detailed instructions.
before subjecting the lathe to full loads, it is
essential to complete the spindle break-in process
as described below. this will ensure the best
results and maximum life of the precision compo-
nents inside the lathe.
the break-in procedure must be performed in suc-
cession with the Test R un procedure described in
this manual, because many of the test run steps
prepare the lathe controls for the break-in pro-
cess.
Important: Do not perform the break-in procedure
independently from the Test Run section—serious
damage could occur to the lathe if the controls are
set differently than instructed in that section.
To perform the spindle break-in:
1. successfully complete the Test Run proce-
dure beginning on Page 26.
2. using the spindle speed levers to set the
spindle speed, run the lathe for 10 minutes
at each of the spindle speeds, starting at the
slowest.
Note: If necessary, refer to Setting Spindle
Speed on Page 51 for detailed instructions.
3. use the foot brake to stop spindle rotation,
set the spindle speed at 2570 rpm, then use
the spindle lever to reverse the spindle rota-
tion and run the lathe for 10 minutes.
Spindle break-In
Do not leave the lathe unattended during
the Spindle break-In procedure. If your
attention is needed elsewhere during this
procedure, stop the lathe and restart the
procedure later from the beginning.