slow motors for lumia

[absolom7691]

Not sure. I don't do commercial shows. I only do this for friends and family. Rear projection and they know not to go near the projector when I have things running.

Do you have a store set up for your torture tubes? I might be interested in getting some. --edit Just saw that you said to PM you. Incoming!

[absolom7691]

Can you post pics of how you attach the shaft to the glass please.

Here's how I am doing it.

[ZeroPoint]

I'm using a 10RPM dc motor to drive a planetary gear set I bought from a hobby store to reduce the rotation down to about 1/4 RPM. I could have gone slower since the set came with a couple more planetary gears but I was happy with where it is now. I love absolom's setup though. I Think I will pick up a motor or two in the near future to steal his design. I love the idea of being able to control the speed. I tried using a potentiometer to make mine variable but too much voltage would blow the motor and too little would cause it to stop spinning. I had to stay in the 3-5 volt range but that wasn't significant enough to make much of a difference. I will definitely try PWM next time around. Your video seemed to look very smooth. Is there any noticeable pulsating at slower speeds or does it stay pretty smooth all the way through the frequency range?

[clickamouse]

Hey guys;

The answers you seek are to be found on the PL Wiki article I posted:

http://www.photonlexicon.com/forums/...rces-for-Lumia

HTH...Mike

[absolom7691]

Is there any noticeable pulsating at slower speeds or does it stay pretty smooth all the way through the frequency range?

I just now got back to this thread and saw that you asked a question! As far as pusling goes, I don't notice it at all. I am guessing that, since the reduction is so high, it's probably not noticable. I'd wager that you could turn the armature on the motor a full turn or maybe even two and probably not even see the shaft on the gearbox move.