I just posted this over in the >$3500 Digital Projector forum, so I thought it might also go here. (This is for moving an anamorphic lens back and forth)
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If you're handy, you can build your own motorized Isco "sled" for around $40 + parts, using a linear actuator like this:
http://www.surpluscenter.com/item.as...-1439&catname=
That particular one is an AC model, but I used a 24VDC model instead of that.
They're very easy to wire, using a cheap DPDT switch for polarity reversal to change direction.
I replaced the aluminum Isco base with polypropylene and it slides very smoothly on another piece of poly underneath. The built-in limit switches stop the unit very accurately each time.
My DC actuator cost $90, but I'm sure there must be less expensive ones out there somewhere. Tough part is finding one with adequate "throw" distance.
The model I used is like this:
http://makeashorterlink.com/?B44A21527
It's very quiet, but kind of slow.
Cheers
David
Here's a picture:

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If you're handy, you can build your own motorized Isco "sled" for around $40 + parts, using a linear actuator like this:
http://www.surpluscenter.com/item.as...-1439&catname=
That particular one is an AC model, but I used a 24VDC model instead of that.
They're very easy to wire, using a cheap DPDT switch for polarity reversal to change direction.
I replaced the aluminum Isco base with polypropylene and it slides very smoothly on another piece of poly underneath. The built-in limit switches stop the unit very accurately each time.
My DC actuator cost $90, but I'm sure there must be less expensive ones out there somewhere. Tough part is finding one with adequate "throw" distance.
The model I used is like this:
http://makeashorterlink.com/?B44A21527
It's very quiet, but kind of slow.
Cheers
David
Here's a picture:
