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Dual line laser pointer holder for chinese laser cutter

by joostn, published

Dual line laser pointer holder for chinese laser cutter by joostn Aug 29, 2014
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OpenJSCAD

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Summary

My cheap 40W chinese laser cutter (brand 'ecpur') included a red cross laser pointer for assisting positioning, but it was mounted fiddly and at an angle, so the focus point depends on the object height.
This design replaces the laser pointer with two line-type laser pointers at 90 degree angles. When positioned correctly, the intersection of the two beams matches the cutting point at every object height.
The lasers are enclosed in ball joints for adjustment. Designed for laser pointers of 12mm diameter, these can be bought on ebay from china cheaply.

Instructions

Designed in OpenJsCad. To modify, edit the .jscad file and go to
http://joostn.github.io/OpenJsCad/processfile.html
to get the STL files.

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Can you provide a link to the lasers you used?

You can find them if you search eBay or Aliexpress for 'Red Line Laser Module 5v 650nm'.
They should cost only $2 to $3 each.

e.g.
http://www.aliexpress.com/item/Free-Shipping-Red-5mW-650nm-Line-Laser-Module-Focus-Adjustable-Laser-Head-5V-Industrial-Grad/32290741097.html

very nicely done,it fits very snugly and makes our Chinese laser cutters more usable.

I'm having difficulty working out how to mount this - is there a chance you could take a couple more pictures of the attachment?
Thanks.

Interesting toy...
Can you cut 1/2" ply with it?
The image appears to be 1/4" ply..
I have actually been thinking of getting one. Do you like yours? is it as exact as it seems on the videos?
thanks

I've been able to cut through 7mm plywood, anything thicker it does not seem to get through.

the chinese laser cutters are fine but the motion control board and software is horrible. I've upgraded mine to laoslaser which makes it usable. Also be aware that they're not up to safety standards.

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