ETC Source Four Revolution User Manual page 44

Motor Adjustment
Screws
Adjusting the front lens belt:
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Step 7:
Step 8:
Step 9:
40
See General belt adjustment instructions:, page
Using both hands, gently move the IMF assembly forward toward the front lens
so that you can access the front lens motor.
Using both hands, gently move the rear lens backward so that you can access
the motor.
Loosen, but do not remove, the four front lens motor mounting plate screws so
the motor moves freely.
Turn the pulley back and forth two or three times and allow the spring to take up
the slack in the belt.
Tighten the screws in a star pattern.
Pinch the belt together to ensure it maintains pressure.
Turn the motor by hand counter-clockwise to drive the lens until the IMF closes.
There should be a slight resistance. Continue turning to open the IMF.
Turn the motor by hand clockwise to move the lens back. If the IMF does not
close properly, readjust the front lens belt so that it is tighter.
Motor Pulley
38.
Source Four Revolution User Manual
Motor Adjustment
Screws.
Belt Tension