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Discussion Starter · #1 ·
Hi
I have a 30w diode laser and have to balance it on 4 tins of coffee when I want to engrave a glass tumbler or other round object as you need a rotary attachment that goes underneath the laser.

So instead of balancing the laser frame precariously on the tins I've come up with another idea an use a couple of 12v motors and 2 scissor lifts, one each side of the frame. Because the revs of both motors are high I've attached a power limiter (I expect its called something else) to bring down the revs so the scissor lift goes up and down a lot slower and safer.

The problem I have at the moment is, after you press the button to raise the scissor lift I don't know how to lower it back down again when I'm finished and want to cut or etch flat pieces of material.

I can do this by reversing the wires so the motor spins in the opposite direction, but there must be a way to do this automatically without changing the wiring. Or put a rocker switch in line that is wired in the opposite direction on the opposite side of the switch.

Does anyone know what I'm talking about as I'm sure this is quite a simple procedure. As you can tell my electric knowledge is somewhat limited so that's why I'm here requesting your help. I'd be grateful for any help here.

Thanks a lot

Fabian.
 

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Discussion Starter · #5 ·
Thanks for the info guy's.
I've taken KenB's approach as I didn't know what the name of the switch was. So I took it to YouTube and there were a dozen or so videos explaining how to wire these rocker switches up correctly.

All sorted thanks.

Fabian
 

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Make sure the switch has the current rating. Not sure what size motors you're using, which is why I suggested relays.

A "center off DPDT", as was suggested, or a "DP3T" or "2P3T" should work if you can't find an "up/down"

You should also be using at least 3 scissors to level it...
 
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