In this video I make a Red Dot “Cut Indicator” that will let me see where the laser is going to cut.
Link to item on Thingiverse: http://thingiverse/thing:751237
The laser diode can be bought on eBay for next to nothing..
By the way, do put on some glasses, close your eyes or look away if you fire the laser with the lid open !
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laser cutter
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