From: Jeff Kreines (email suppressed)
Date: Thu Mar 15 2007 - 13:01:07 PDT
Most projectors use constant speed motors -- some synchronous -- that
are designed to maintain a reasonably constant speed despite voltage
variations. The capacitor is used to start the motor -- an extra hit
of power to get it moving, nothing more.
The easiest way to vary the speed on a 16mm projector is to bypass
the internal motor and drive it via another motor timing-belted to
the inching knob or drive shaft.
There are other ways, but not simple and they will cost more.
On Mar 15, 2007, at 7:22 AM, mat fleming wrote:
> Does anyone know how the motors in Elf 16mmmachines work. I am
> trying to slow one down. it has four cables going in to into it
> red, blue, brown, white. We need to replace the capacitor and power
> supply. Is it 24 volts DC like the lamp. or am I completely barking
> up the wrong tree? (it's a blue one);.
> For info on FrameWorks, contact Pip Chodorov at <email suppressed>.
For info on FrameWorks, contact Pip Chodorov at <email suppressed>.