Troubleshooting guide

ManualsBrandsEmerson ManualsComputer equipmentVission

Calibration For Earlier Style Mechanical Gearmotor/Potentiometers

· Capacity Slide Valve Potentiometer Calibra-

tion – Move the capacity slides to their mini-

mum position. This can be accomplished by

either electrically actuating the slide valve

motor through the Force Outputs On or by

manually actuating the slide valve motor. To

manually actuate the motor, release the brake

and turn the hex nut on the gear motor in the

proper direction to move the capacity slides

to their minimum position (see Table 1).

IMPORTANT

After the slide valves have contacted the inter-

nal stop, release the tension in the mechanism

by actuating the brake and then manually turn

the command shaft back one tooth on the com-

mand shaft gear. Failure to do so may result in

premature failure of the gear motor.

Remove one of the ¼” socket head cap

screws from the potentiometer bracket,

loosen the other and turn the potentiometer

shaft until a millivolt reading of between 900

and 1100 is displayed in the Current window

above the Set Min button. Mesh the potenti-

ometer gear with the command shaft gear and

replace the ¼” socket head cap screw. The

millivolt reading must remain between 900

and 1100 millivolts. Without changing the

gear mesh, remove one ¼” screw, and apply

Loctite #242 to the threads. Reinstall the

screw finger tight, then repeat the procedure

on the remaining screw (do not change the

orientation of the lockwashers on the screws).

The gear lash must be adjusted so there is no

side load on the potentiometer shaft. Tighten

and torque the ¼” socket head cap screw to

16 ft/lbs. Recheck the millivolt reading. It

must be between 900 and 1100 millivolts. If

not, the gear mesh will have to be readjusted.

At this point, press the Set Min button in

the Capacity Slide Valve Potentiometer win-

dow. Realize that the Current Cap window

will show a value, but it has no meaning at

this point. Now turn the command shaft to

the fully loaded position. With the slide

valve against the mechanical stop, release

the tension in the mechanism by actuating

the brake and manually turn the command

shaft back one tooth on the command shaft

gear. This is the maximum millivolt posi-

tion. Now press the Set Max button. Cali-

bration of the slide is completed AFTER

pressing the Main button, to exit the Slide

Calibration Screen. Now if you re-enter the

Slide Calibration Screen, the correct value

will be displayed in the Current Cap win-

dow and on the Main screen.

· Volume Slide Potentiometer Calibration –

Move the volume slides to their minimum

position. This can be accomplished by ei-

ther electrically actuating the slide valve

motor through the Slide Calibration Screen

INC and DEC buttons, or by manually actu-

ating the slide valve motor. To manually

actuate the motor, release the brake and turn

the hex nut on the gear motor in the proper

direction to move the volume slides to their

minimum position (see Table 1).