Summary

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Laser isvery dangerous! NEVER use it without safety protection!! Even a cheap250mW Laser can harm your eyes badly!!!

If you dont have any safetygoggles, use at least your phone ́s camera(which is replaceable, not like your eyes...) for checking and focusing. Butbe also aware that this could damage the camerachip !!

I ́m not responsible for any damage!

#### Notice:

Try to print one of the smaller parts to see if the inner diameters will fit toyour printer. I made them 0.5mm bigger so they will fit to my GeeetechA30!

Moe

CheapLaserengraverusing 28BYJ-48

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updated 16. 4. 2020 | published 14. 4. 2020

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I tried to build a cheap Laserengraver out of old DVD drives using partshere from Thingiverse. Since that didn't worked out like expected, idecided to design my own one, using parts that i had laying around. Pleasekeep in mind, that a 250mW Laser just can engrave dark, natural materialslike leather, cork, etc...

Long story short :-) Here are the Parts you will need: 1x 250mW Laser,Testetd and used in my Video (mounting for more powerfull laser commingsoon) https://s.click.aliexpress.com/e/_dVdFYFk OR 1x 1000mW Laser (Nottested, can ́t say anything about the relaiabilty of it ) https://s.click.aliexpress.com/e/_d8SLVCm 2x Timingbelt G2.5T (1m in total ismore than enough) https://s.click.aliexpress.com/e/_dYMpcQ6 4x Bearings625Z https://s.click.aliexpress.com/e/_dVgLcWK 2x 28BYJ-48 12V Steppermotors (modifyied like in the description: ) https://s.click.aliexpress.com/e/_dWisYue 3x Screws M3x10 https://s.click.aliexpress.com/e/_dYCCKny 4xSmooted Rods (you can use every length, just 2 pairs per Axis) https://s.click.aliexpress.com/e/_dZU3jhc 6x LM8UU Bearings https://s.click.aliexpress.com/e/_Bf6YHSse 1x M8 Rod (length depending on theRods youre using, You will need 2 for the Y-Axis) https://s.click.aliexpress.com/e/_dT2z4Jy 1x M6 Rod (length depending on theRods youre using. You will need 1 for the X-Axis) https://s.click.aliexpress.com/e/_dT2z4Jy 4x Bolts M6 https://s.click.aliexpress.com/e/_d6H6OLc 8x Bolts M8 https://s.click.aliexpress.com/e/_d6H6OLc Last but not least, any kind of GRBLController (Uno Shiel, old 3D Printer Hardware.... https://github.com/grbl/grbl ) https://s.click.aliexpress.com/e/_dTgSJxg

You have to modify the Stepper motors from Unipolar to Bipolar, that wecan use them with normal stepper drivers. This is less work, than itsounds. Just open the blue Cover on the backside of the stepper, andscratch the trace on the PCB between the two conacts in the middle (onthe red wire) and finally remove the red wire. Now you have a normalBipolar stepper motor that you can use with every stepper driver

Set the Current of the stepper drivers to something around 0,09V or 0,08Vto get a smooth working engraver without overheating. Dont tighten theBelts too much, otherwise the cheap gearbox inside will be damaged (ikilled 5 motors with to tight belts, before i found out that this is a biggerproblem)

The X-Axis can be tighten by the M6 rod in the middle ( i made the holeslong enough)

As Software for engraving I ́m using lasergrbl on a Virtual machine (linuxuser): http://lasergrbl.com/

Model Files (.stl, .3mf, .obj, .amf) DOWNLOAD ALL FILES

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Video of the working Laser in original Speed:

https://youtu.be/H9AmGd_vd2k

Hobby & Makers > Tools

engraver laserengraver laser grblarduino grbl 28byj48

bottommount.stl

beltclamp_y_axis.stl

beltklamp_x_axis.stl

pulley_tensioner_base.stl

y_axis_1.stl

x_axis_250mw.stl

pulley.stl

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The Author has not uploaded any print files.Try to search in User print files section or generate and upload yourown.

License

This work is licensed under a GNU

General Public License v2.0

✖ | Sharing without ATTRIBUTION ✔ | Remix Culture allowed ✔ | Commercial Use ✔ | Meets Open Definition ℹ | Share under the same license

base_2.stl

base_1.stl

y_axis.stl