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PippijnVS 07/01/2021
Assembly instructions very clear. I like the simplicity and barebones-ness. The controller talks GRBL, so open up LaserGRBL and send it instructions. No need to focus the laser, so just put your item under the laser and turn it on. The stepper motors are fairly accurate, but on the X axis (410mm), it's off by about 1mm at the far end (G0 X400 places the device at 398.5mm). This might be due to the cable pulling a bit on the motor as it reaches the far end. Once it loses that 1-1.5mm, it doesn't get it back on the way back, so you'll run into the wall at G0 X0. It's accurate up to 350mm at least (haven't figured out exactly where it loses that 1mm). I would recommend staying away from the far end and operating within a smaller than 410x400mm area, or perhaps I can do something about the cable strain. The laser itself is 450nm, and the laser module comes with the correct (red) filters. However, the safety goggles this comes with are green, which leads me to believe they would let through some higher frequency light. I purchased some red laser safety goggles myself, I looked at the laser reflection at M3 S30, and I'm not blind yet :) though it was pretty bright, so I wouldn't recommend looking at it on full power. I did not try the goggles it came with as I don't trust them. A note on GRBL: M3 S1 is enough for checking where your laser is. LaserGRBL "focus laser" is M3 S30 (which is supposed to be 3% of the laser's power but might be 8.5%) and is a bit too strong and may start burning into your plywood. Whatever S1 means (0.1% or 0.4%) is visible already so you can use that.
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