Author Topic: Existing CNC mill to Laser  (Read 758 times)

EddyK

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Existing CNC mill to Laser
« on: July 05, 2020, 09:50:35 AM »
Hi,

I want to build my existing milling CNC to a laser cutter for balsa/plywood.

Current setup has 4Amp stepper motors.

I think I will go for a 5W Laser (https://www.banggood.com/450nm-5W-Laser-Engraving-Module-Blue-Light-With-TTL-Modulation-p-1337358.html?rmmds=mywishlist&cur_warehouse=CN)

What would be the Controller board to use?

Thanks,
Eddy

ggallant571

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Re: Existing CNC mill to Laser
« Reply #1 on: July 05, 2020, 12:03:43 PM »
The typical diode laser etcher supports 1.5A NEMA-17 motors.

The ability to cut is dependent on laser power, speed, and focus point size. A laser dot with a diameter of 0.2mm  is 4 times the area of one with 0.1mm. From my experience and hundreds of comments on this site, 5.5W diodes have a much larger dot than 2.5W which are larger than 1.6W. Then there is the issue of lenses to add to the mix.+

Couple of weeks ago there was a thread by a model plane builder. If that is your game I would suggest getting in touch with him for details on what works.
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