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L-Cheapo Laser Cutter Parts

by spiritplumber, published

L-Cheapo Laser Cutter Parts by spiritplumber Jun 5, 2014
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http://robots-everywhere.com/re_wiki/index.php?n=Main.LCheapo How to make (or buy) the L-Cheapo here, with photos and schematics.
The L-Cheapo is a laser cutter 3d printer accessory that will cut up to 3/16" wood or acrylic. It is in the process of being open sourced, so we're releasing the working drawings here.
The jig for making the heatsink is demoed here:


Zip-tie the fan to the upper end by the screw holes; zip-tie the PCB to to the middle; screw the heatsink in using the lower hole. Basically, see picture!
For the Solidoodle, you can use the Z screw holder with the kickstand to replace the stock screw holder.
For the generic mount, you'll have to come up with a kickstand appropriate for your printer.

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I'm familiar with printer build, printer operation, Gcode and axis direction. I have found no one able to replicate your results
on acrylic regardless of the number of passes, the height of the work piece, focal point, etc. etc. .
You must be truly gifted. LOL

I've found no one able to duplicate your results on acrylic.

Hello! To cut acrylic or thick wood with the L-Cheapo, do multiple passes, and be sure to set Z scaling to -1 so that the build plate moves up rather than down. You will likely have to jog the Z axis down a little (the thickness of the workpiece) before hitting print.

Very interesting. Never thought 2W diode lasers can be used to cut through something like 3/16 acrylic (like it shows on your http://indiegogo.comindiegogo.com video). At what speed are you cutting and how many passes does it take?

A lot - 30~50. This is definitely for prototyping rather than production :) But it does work, and you can do mitering.

I'm following with interest, I know it's a work in progress but could you work in proper threaded screws for the heatsink\fixing to the mount as it sends a shiver down my spine recalling the guy that fitted a CD writer into his desktop PC using 1" long wood screws & wondered why we wouldn't warranty it.
Also is there a risk to the build plate (Replicator 2) once the laser has cut through the material or do you swap it out?
Manufacturing parts or assemblies isn't as cheap as doing something yourself, I produce a electronics unit in small quantities & I'm realistically making a loss on each one I produce due to the assembly time involved, if I had to pay someone then I'd have to charge a whole lot more.

I use a "blank" (copper covered) circuit board as a background material, that is enough to diffuse the beam.

Sorry if you don't mind me asking, but what makes up the cost of this other than the laser and power supply that can be found for about $90?( http://www.ebay.com/itm/638nm-300mw-Red-Module-12V-TTL-Laser-Moudle-Orange-Red-laser-beam-RL300-/121155969659?pt=US_Stage_Lighting_Parts_Accessories&hash=item1c3575627bhttp://www.ebay.com/itm/638nm-... ) Isnt it possible to just hook the 12v output for the extruder right into this?

I had to set up a manufacturing line, hire a couple of people, etc. Making things in the US is expensive.
Also, most of those modules are intended to be on briefly (a few minutes at a time), not all the time.
Finally, note that the module you linked me is 0.3W and the L-Cheapo
is 2.1W -- this is why the L-Cheapo can actually cut plastic rather
than just engrave it; it's 7 times as powerful.

Awesome! thanks for being open about what is in your design, best of luck!