SETTINGS AND ADJUSTMENTS
SECTION 4-26
Setting and Adjusting the Chamber Jackscrew
SET THE JACKSCREW CLOSED-POSITION LIMIT
SWITCH (Continued from previous page)
Rotate the CLOSED POSITION NUT (4) until the switch (5) trips. Then turn it an additional half turn toward the switch.
Replace the keeper (1).
Test the closed position and be prepared to release the selector switch at the jackscrew console if the stop fails.
If the operation is satisfactory, replace the housing cover.
THE CHAMBER STOPS BEFORE IT CLOSES BUT THE
MOTOR CONTINUES TO RUN
IMMEDIATELY SHUT DOWN THE JACKSCREW MOTOR. DO NOT ALLOW THE JACK- SCREW MOTOR TO RUN BEYOND THE POINT WHERE THE CHAMBER MOTION STOPS: THIS COULD RESULT IN SEVERE DAMAGE TO THE JACKSCREW.
Check the mating surfaces of the cutting chamber (between the upper and lower chamber) to ensure that it is clear of debris that may prevent it from closing.
The mounting bracket limit switch should have tripped. When this switch trips the electrical current to the jackscrew motor is interrupted, stopping the motor. If the switch does not trip, it needs to be adjusted. If the switch has tripped, but the motor continues to run, then the switch may be defective and/ or the remaining electrical circuit will need checking by an electrician.
SET & TEST THE MOUNTING BRACKET LIMIT
SWITCH
Remove the sheet metal cover
Loosen the two screws on the limit switch mounting plate. With the chamber open, adjust the plate so that the limit switch plunger is within 1/8 in. (3 mm) of the machine base plate.
(Continued on next page)
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