<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>"<span style="background-color: rgba(255, 255, 255, 0);">Or you can just 'borrow' the winch in your gym built to pivot a basketball hoop out of the way, or the winch used to pull a Pleasure Craft on to it's trailer."</span></div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">You COULD but that's probably not a very good idea. Probably fixed speed with no accel or decel and certainly no emergency stop loop in case something goes south. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Brian Munroe<br><br>Sent from my iThingy. Please excuse any typos</div><div><br>On May 11, 2016, at 12:58 PM, Richard Niederberg via Stagecraft <<a href="mailto:stagecraft@theatrical.net">stagecraft@theatrical.net</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Or you can just 'borrow' the winch in your gym built to pivot a basketball hoop out of the way, or the winch used to pull a Pleasure Craft on to it's trailer.<div>/s/ Richard</div><div>_________</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 11, 2016 at 9:14 AM, Loren Schreiber via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">AC motors have pretty much supplanted DC motors in most industries. The cost of AC inverters (drives) has come down to the point that AC is actually a much more economical way to go.<br>
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In this case, it's not a simple matter of buying a variable speed motor. All commonly available motors (AC or DC) will need a gear box of some sort to drop the speed and increase the torque to something you can use. But that's not the end of it. If you are connecting a cable to this motor, then you will need a drum of some sort and the support structure (winch) to go with it. As others have mentioned, then there is electrical cabling ($$), controls, e-stop circuits, electrical enclosures etc., etc., etc. All this is fun stuff to design and build, but it sounds like you are on a tight schedule and a little behind the curve for developing your own system in house.<br>
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Others have mentioned Creative Conners as a source for a turn-key system that you can buy off the shelf. I heartily concur. However, a glance at the prices (and Creative Conners is very affordable when compared to other available systems) and I think, in this case anyway, you might just want to pull a rope. I have designed and built automated scenery movers for decades now, but these days it's just easier, cheaper and faster to buy a system like Creative Conners.<br>
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OK, that said, I know of a school that will rent a compact hand-cranked winch that would likely work in your situation. Most of your cost would be shipping to and from your theatre because winches are heavy. Let me know and I will put you in touch.<br>
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Loren Schreiber, Professor Emeritus<br>
San Diego State University<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">/s/ Richard<br>_________</div>
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