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You'll Shoot Your Eye Out!

A project log for MultiBot CNC v2

A low cost 3D printed CNC that can be built with minimal tools yet is capable of great things.

david-tuckerDavid Tucker 03/13/2021 at 01:510 Comments

Well in spite of Neje.shop saying my laser would ship form California it finally arrived from China.  At least it only took two weeks rather than 2 months!  Anyway I made my first attempt at a mount for the laser and in the spirit of stupidity I fired it up.  I can say it works and works quite well!

The kit comes with quite a lot of parts for the extra $10 over the base module.  You get glasses, two adapter boards, 3 cables (one about a meter long), a power supply, 24v adapter, two Allen wrenches and some simple instructions all packaged up nicely in a well padded box.  I would say this is worth it for the price.  You may not need it all but just the power supply alone is worth $7 or so.

There was not a lot online about this module, so here are some up close images of it.  The mount is roughly 40x40 mm square, and there is about 20 mm of range for moving the mount up and down.

I can see why they suggest a much smaller laser would be better for engraving.  At only 20% power this 30w laser can burn a hole almost completely through a pad of paper.  I was using 14% power to cut through a sheet of paper no problem.

It should be clear from the picture above that the small piece of red plastic at the front of the laser is NOT enough to run the laser without glasses.  It is still better than the older design with the end of the laser being fully exposed.  This version is much harder to accidentally touch the laser beam when adjusting focus.  But still you must wear the glasses at all times and/or add a fully enclosed box.

Anyway now I need to make a better mount, and rework my cnc shield so it can control the laser properly.  Judging by the snowy shaped lines on my spoiler board  I need to come up with some sort of a way to elevate parts off the bed and while cutting paper did not create a lot of smoke it made enough that I need to work out some sort of a vent or filter as well.

I'm heading out on a camping trip with the family, so all that will need to wait, but I hope to have a proper writeup soon.

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