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How can I sequence several small motors. Answered

Wife approved Home Theater



​I plan to build raised panel cabinets that also hide home theater speakers and 60" screen. Open display/bookshelves sit between the speaker garage and the 60" screen. The raised panel (I'll make with my 5hp shaper) covering the speaker will roll over the display cabinet allowing the speakers to move out into the room on motorized platforms. Then, the speakers will rotate on a motorized turntable  to the desired position. Next, the two panels covering the screen will move under the speaker panels and also cover the display cabinet plus a little of the garage space.
I want this to all be initiated with the push of a button. The motors will all be sequential in the above order. First, the speaker panel can roll until it hits a button, next, the speaker platform movement could be controlled by motor revolutions as in a stepmotor and would stop the platform at the right spot. When this action is complete, the speaker rotation could also use a step motor count. Next, the two screen panels will roll under the speaker panels until they hit a final stop button. I will need a central controller to manage the sequence order. I am familiar with Fishertechnik robotics controllers but I'm hoping that someone here can give me some suggestions to make this work.
Thanks for reading.
Chuck

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iceng

Best Answer 4 years ago

Here is a simple circuit that will raise three motor items one at a time and Halt,

M1 then M2 then M3 then HALT using limit 3 top of travel limit switches and diodes.

When reversing switch S4 is up !

When S4 is down, M3 goes down followed by M2 followed by M1 and halt.

You may expand the number easily.

Size_B.bmp
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oneartist

4 years ago

Steve, You don't know how much I appreciate your help. I just had surgery on my mouth and they extracted a front tooth and dug out rotten bone and filled it with cadaver bone and sewed it back up. I have to wait 3 months before there is enough bone to set an implant. My back is also healing after a month of being unusable. I plan to get back into my projects after I heal. I will use your circuit and I'm looking forward to learning electronics. I taught a basic Fischertechnik class in robotics years ago and I understand the basic ideas of sequences starting and stopping. Thanks again for you help.

Chuck

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steveastrouk

4 years ago

Think DC motors, and not steppers, and think limit switches, not counting.

The key to this thing is to use a device called a PLC to control everything, and sequence it just so.

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oneartiststeveastrouk

Answer 4 years ago

Thanks. I'll start looking for a PLC that will control 8 motors. The first place I looked also talked about using AC motors as another option.

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steveastroukoneartist

Answer 4 years ago

Try the Crouzet Millennium III, its very easy to program using the PC tools. You still need a bunch of relays as well.