Grizzly G0704 - Manual (Page 23)

Model G0704 (Mfg. Since 08/11)
-21-
Test Run & Spindle
break-in
the model g0704 spindle speed can be set from
50–2250 rpm. you must follow the proper break-
in procedures to ensure the spindle bearings
break-in and seat before putting any milling load
on the machine.
To test run and break-in the spindle bearings:
1. do all lubrication procedures highlighted in
Lubrication in Section 6: MAINTENANcE
on page 36.
2. make sure there are no obstructions around
or underneath the spindle.
3. place the spindle direction selection knob in
the "0" (oFF) position and press the emer-
gency stop button (
figure 17)
figure 17. test run controls.
4. Connect the mill/drill to the power source.
5. turn the speed range selector knob to the
"l" (low) position ( figure 1 on page 3) and
rotate the variable spindle speed knob all the
way to the left (slowest) position.
6. place the spindle direction knob in the "F"
(Forward) position. squeeze the tab on the
emergency stop button, pull it open, then
press the green button. the spindle will begin
to turn at a low rpm.
emergency
stop button
variable spindle
speed Knob
spindle
direction
Knob
spindle rpm
readout
failure to follow start up and spindle break-
in procedures will likely cause rapid deteri-
oration of spindle and other related parts.
NOTICE
10. increase the speed to 1000 rpm and let it
run for another ten minutes.
11. increase the speed to 2200 rpm and let it
run for another ten minutes.
12 . turn the mill/drill OFF.
13. set the spindle to rotate in the opposite direc-
tion, then press the green button and let it run
at 1000 rpm for another ten minutes.
DO NOT leave the area while break-in pro-
cedure is under way. you must be ready to
stop the machine if a problem occurs.
NOTICE
—When operating correctly, the machine
runs smoothly with little or no vibration or
rubbing noises.
— investigate and correct strange or unusual
noises or vibrations before operating the
machine further. always disconnect the
machine from power when investigating or
correcting potential problems.
7. press the emergency stop button. the
machine should stop.
—if the machine does stop, the emergency
stop button safety feature is working cor-
rectly. Continue to
Step 8.
—if the machine does not stop, the emer-
gency stop button safety feature is not
working correctly. this safety feature must
work properly before proceeding with regu-
lar operations. Call tech support for help.
8. open the emergency stop button cover and
press the green button to start the spindle.
9. While watching the spindle rpm readout,
turn the variable spindle speed knob until the
mill/drill reaches approximately 600 rpm,
then let it run for a minimum of 10 minutes.