Dobot Mooz Laser Etching Jig

thingiverse

I have a <a href="https://amzn.to/2FsgKy3">Dobot Mooz</a> that I use primarily for laser etching. Don't look at me that way. I didn't say I was *proud* of it...I just said I *had* it. I did self-modify the laser if that helps restore faith in any way. :-) Anyway as I was etching/cutting a bunch of stuff I found the need to have a positioning jig for consistency. So I created this jig which bolts to the Mooz deck plate. The holes line up exactly with the top and bottom row of mounting holes on the plate. The bottom holes are oval in the Y direction to give you a little forgiveness for slop. Width is exactly the width of the plate, which makes alignment while you're mounting it quite easy. The lip is 8mm high and the bottom is 2mm, so you have plenty of vertical room to put sacrificial material on top and still load your stock. One cool little feature you might be able to use elsewhere is a little indentation I put in the design right at the 0,0 point as a guide to set the XY zero point (see detail photo). The indentation is just a little divot with a cone in the middle and a flat top. When you're setting the XY the dip gives you a nice visual indicator that you're on the mark (bright bright bright...dip...bright bright bright) on each axis. Hard to describe until you try it but once you do you'll say, "Hey that works." After that you'll have a nice zero point at the exact lower-left corner, which matches nicely with LaserWeb. After that you can jam your stock against the left and bottom walls and you'll be square and true. Unfortunately if you HAVE a Mooz you'll need to print this on something other than a Mooz because the Mooz bed isn't big enough. Sorry about that. You could always throw this design into Tinkercad and slice it into quarters, then glue them together. You can use this as a good base for your own custom production jigs as well. Just throw into Tinkercad and add supports/stops/etc. where you need 'em. With the zero point marker and how it fastens to the bed it'll give you very consistent results if you're frequently switching between items. Just change the jig each time you change to a new item and you're golden.