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Nick
Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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From what you were saying about up to 500 frames with the curtains moving each time, you could really increase productivity by making the curtains move as fast and as automatically as possible, so the faster drill motors will make you money. You might also think about adding limit switches so the blinds stop automatically; here is a circuit ideas page:
http://www.beam-wiki.org/wiki/Using_Limit_Switches
This idea might be way off as I haven't seen your setup: If you always do a transition between two colours, how about having a PVC pipe roller at the top, driven by a drill motor. rather than just lowering a sheet, you join the background colours end to end, forming a loop that hangs off the top roller but isn't attached to it. You put in a free-rolling pvc pipe at the bottom of the loop to keep it taut. That only needs one drill and no reverse, so your controls are much simpler. the motor current should also be lower as you are not really lifting anything, just rolling the loop in place.
Just rotate the loop half way to show the alternate colour. I don't know what your curtain material is, but if you are using rosco scenery paper, a bigger diameter roller will stop it going wavy with use - I went through background paper really fast when I was in TV and winding backgrounds on & off their narrow rolls.
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Tue Aug 09, 2011 9:29 pm |
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