Issue: 04/2011
Via gears the following shafts are driven by the main drive motor :
3 Intermittent movement
3 Feed sprocket
3 Bottom sprocket
3 Shutter
3 Take-up friction (option)
The 3-phase motor directly drives the Maltese Cross which is anged onto the motor.
The two sprockets shafts and the shutter shaft are driven by the motor via chains and
gears. The optional take-up friction shaft is driven by the motor via a toothed belt.
X
Tighten the chains is described in chapter 6.4.10.
To pull the lm down one picture at a time the intermittent sprocket has to move the
lm ahead by four sprocket teeth (¼ of a complete rotation):
A motor rotates the cam continuously. During each rotation the cam’s pin engages
one of the slots in the starwheel and pulls it ¼ turn. As soon as the pin leaves the
slot, the outer surface of the cam engages the curved surface of the starwheel which
prevents the starwheel from turning until the pin engages the next slot.
During this time the lm is held still in lm gate and is able to project the picture.
The intermittent movement is in a closed oil bath.
To Next Page
Loading...
