Adding a neje A40640 II laser to my lowrider 3 skr pro 1.2

LowRider CNC Advice
1

I was wondering if anyone has added this laser and if so, can you share your wiring diagram and pic of the setup. I have searched all over and I thought I found one, but it seemed different… and now I can’t find it!! It looks like I will need a separate power supple than the board and I want to confirm the setup so I don’t fry anything. Thanks for the help!

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hi, just want to check if you were able to add the laser and make it work?

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I was! I bought the Neje laser and it was plug and play. I plugged it into my board and didn’t have to monkey with anything else. I read some posts about adding a relay and resistor but I did not have to do that. I got the Neje A40640 II and a separate power supply.

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I use lightburn and it has worked great. You will have to do a material test to determine what speed and power are best for you. I haven’t done anything crazy with it yet. Just simple images.

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I have two of the original A40640 modules. They had the same companion board, so the hookup will be the same as the 40640 II modules.

It looks like I will need a separate power supple

A separate power supply is not required. If your CNC uses a 12V power supply, and if it has a high enough current rating, you can use it to power both the laser module and your CNC. I would recommend a power supply rated at 12V 15A to power both.

As for hookup, you must decide if you want to use the companion board, and if so, where you want to mount the companion board. The companion board can be mounted with the laser module on the core, or it can be mounted with your CNC electronics. Where you mount it determines what cables need to be lengthened. When lengthening cables, I recommend larger gauge wire (18AWG or 20AWG) for the wires that carry power.

If you don’t use the companion board, and you use different power supplies, you will need to splice into the ground connection and bring a ground wire to the control board. The laser module and the CNC control board must share a ground. If you use the companion board, this ground connection is provided for in the cable from that board to the CNC control board.

As for the actual wiring, the four-wire cable goes between the laser and the companion board, and the two-wire cable goes between the CNC control board and the companion board. The power supply plugs into the barrel jack. And you are done. Except for lengthening wires, everything is plug-and-play.

Let us know what board you are using to control your CNC, and we can tell you what pin to use to drive the laser.

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Steve,
What mount did you use for the NEJE A40640Ⅱ? I just ordered one.

thanks,
Steve

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I’ve done several tool mounts for my NEJE A40640, but, unfortunately, they won’t work with the updated ‘II’ version of the laser module. I’ve attached a ZIP file with the one mount I created that should work with the A40640II.

For my laser, I made a new Z axis. That way I can switch between the router and the laser by pulling out the router Z axis and inserting the laser Z axis.

Basic Primo Tool Mount.zip (503.8 KB)

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Thanks Robert! I’m away for a few days. I’ll take a look when I’m back.

Steve