Adjusting the imf, N o t e – ETC Source Four Revolution User Manual
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Source Four Revolution User Manual
Step 7:
Remove the old media and replace the media in each frame. Trim the media to
the shape of the frame. Trim the center edge carefully so that it is straight and
without nicks or extra bits of gel that could catch when the two wings close
together.
Step 8:
Insert the frames back into the wings of the internal media frame mechanism until
they “click” into place, ensuring they are fully seated. The frames are identical
and may be installed into either wing.
Step 9:
Replace the head cover and the scroller cartridge.
Step 10: Unlock the yoke.
Adjusting the IMF
The IMF is designed to operate quietly. If it becomes noisy or does not open and close
properly, you can adjust it. The IMF is opened and closed by a pair of pawls that contact
the door tabs. Both the pawl spring tension and the door tabs can be adjusted. If the spring
has too much tension, the pawl will make a "snapping" noise. If the spring is too loose, the
pawl will not engage the IMF door tab properly. If the door tabs are not adjusted properly,
they will obstruct the pawls or prevent the IMF from opening and closing.
N o t e :
Prior to adjusting the IMF, make sure the front lens belt is properly adjusted. See
Adjusting the front lens belt:, page 36
Adjusting the IMF pawls:
Step 1:
Power-down the fixture. See
.
Step 2:
Lock the fixture head and yoke in a convenient position using the pan and tilt
locks.
Step 3:
Remove the head cover by loosening the two captured screws holding it in place
and lifting the cover off the head.
Step 4:
Using both hands, move the IMF assembly back away from the front of the
fixture.
Step 5:
Loosen the spring tension clip screw so that the clip moves freely.
Step 6:
Move the clip forward or backward and flip the pawl with your other hand. If the
pawl makes a snapping noise, loosen the spring tension by moving the spring
clip towards the front of the fixture. If the pawl does not close completely so that
it does not engage the IMF doors, move the clip toward the rear of the fixture.
Pawl
Spring
Tension Clip
Right Pawl
Left Pawl