L-Cheapo Laser with Shapeoko 3

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heathenx
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L-Cheapo Laser with Shapeoko 3

Post by heathenx » Sat Feb 13, 2016 2:01 am

I have an L-Cheapo laser left over from my old delta 3d printer. I would like to connect it to my Shapeoko 3 if possible. However, the laser is 12 volts. Will that work on the Carbide 3D board? Is the PWM (spindle control) 12 or 24 volt?
Shapeoko 3, #405 / Dewalt 611 w/Super PIDv2, limit switches

RoguePirin
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Location: Illinois, USA

Re: L-Cheapo Laser with Shapeoko 3

Post by RoguePirin » Sat Feb 13, 2016 6:32 pm

I believe that all of the output signals on the Carbide Motion controller are 5V, including the PWM signal.
Shapeoko 3 #677, Nyloc nuts, ¾" HDPE base with t-nuts, Dewalt 611 w/Super PIDv2

heathenx
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Joined: Thu Apr 02, 2015 10:59 am

Re: L-Cheapo Laser with Shapeoko 3

Post by heathenx » Sun Feb 14, 2016 2:32 am

RoguePirin wrote:I believe that all of the output signals on the Carbide Motion controller are 5V, including the PWM signal.
In that case perhaps I'll shelf it for some other project. Thanks.
Shapeoko 3, #405 / Dewalt 611 w/Super PIDv2, limit switches

AnonymousPerson
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Re: L-Cheapo Laser with Shapeoko 3

Post by AnonymousPerson » Sun Feb 14, 2016 2:53 am

Would it be worth running a second cable into the enclosure, with something like this?

http://www.amazon.co.uk/dp/B00CXYNV48

On the case, you could mount one of these, to keep things simple-ish:

http://www.amazon.co.uk/gp/product/B00WZ82NC8
Shapeoko 3 #516

heathenx
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Joined: Thu Apr 02, 2015 10:59 am

Re: L-Cheapo Laser with Shapeoko 3

Post by heathenx » Sun Feb 14, 2016 2:57 pm

AnonymousPerson wrote:Would it be worth running a second cable into the enclosure, with something like this?

http://www.amazon.co.uk/dp/B00CXYNV48

On the case, you could mount one of these, to keep things simple-ish:

http://www.amazon.co.uk/gp/product/B00WZ82NC8
I have a bunch of those 12 volt wall warts. The laser does in fact work with it but what I really need is a way to turn the laser off and on when traveling between burns. That's what I was hoping the PWM was going to do for me. With the wall wart the laser is always on.
Shapeoko 3, #405 / Dewalt 611 w/Super PIDv2, limit switches

RoguePirin
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Location: Illinois, USA

Re: L-Cheapo Laser with Shapeoko 3

Post by RoguePirin » Sun Feb 14, 2016 3:11 pm

heathenx wrote:what I really need is a way to turn the laser off and on when traveling between burns. That's what I was hoping the PWM was going to do for me.
If all you want is the on/off signal, the PWM can still work for you; just not directly. You can get a relay that is triggered off of 5V. With the PWM signal on full, it will trigger the relay and allow the load through; in this case, you would have your 12V from the wall wart to your laser be the switched load on the relay.
Shapeoko 3 #677, Nyloc nuts, ¾" HDPE base with t-nuts, Dewalt 611 w/Super PIDv2

heathenx
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Joined: Thu Apr 02, 2015 10:59 am

Re: L-Cheapo Laser with Shapeoko 3

Post by heathenx » Sun Feb 14, 2016 7:22 pm

Thanks, RoguePirin. That sounds interesting. Can you recommend a relay source?
Shapeoko 3, #405 / Dewalt 611 w/Super PIDv2, limit switches

RoguePirin
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Location: Illinois, USA

Re: L-Cheapo Laser with Shapeoko 3

Post by RoguePirin » Sun Feb 14, 2016 8:08 pm

I am by no means an expert in the electronics arena, but something like this should work for you. This one is rated for up to 5 amps, so make sure that is correct for your laser. If your laser draws near or over 5 amps, this one won't work for you.

The previous link is just the relay. If you want a prefabbed circuit board to connect to, I found this on Amazon. I can't speak for the manufacturer quality, but it is rated for loads up to 10 Amps and has screw down connections for the laser side of things.

If anyone one else on the forum has more electrical experience and wants to chime in, that would be great, too.
Shapeoko 3 #677, Nyloc nuts, ¾" HDPE base with t-nuts, Dewalt 611 w/Super PIDv2

heathenx
Posts: 114
Joined: Thu Apr 02, 2015 10:59 am

Re: L-Cheapo Laser with Shapeoko 3

Post by heathenx » Sun Feb 14, 2016 8:26 pm

Brilliant! Thanks! Your Amazon link looks like a nice unit.
Shapeoko 3, #405 / Dewalt 611 w/Super PIDv2, limit switches

McOtis
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Location: Maryland

Re: L-Cheapo Laser with Shapeoko 3

Post by McOtis » Mon Feb 15, 2016 2:18 pm

Since you are dealing with DC, a MOSFET will work as well.
For my laser, I simply am using a IRLB8721. I milled a custom PCB for some easy wiring.
For a pre-built option, this will work from Sparkfun: https://www.sparkfun.com/products/12959
Last edited by McOtis on Tue Feb 16, 2016 2:00 pm, edited 1 time in total.

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