使用 28BYJ-48 的廉價(jià)激光雕刻機(jī)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Laser is very dangerous! NEVER use it without safety protection!! Even a cheap 250mW 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. But be also aware that this could damage the camerachip !! I´m not respoible for any damage! ########## Notice: ############################ Try to print one of the smaller parts to see if the inner diamete will fit to your printer. I made them 0.5mm bigger so they will fit to my Geeetech A30! ############################################ I tried to build a cheap Laserengraver out of old DVD drives using parts here from Thingivee. Since that didn't worked out like expected, i decided to design my own one, using parts that i had laying around. Please keep in mind, that a 250mW Laser just can engrave dark, natural materials like 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 comming soon) OR 1x 1000mW Laser (Not tested, can´t say anything about the relaiabilty of it ) 2x Timingbelt G2.5T (1m in total is more than enough) 4x Bearings 625Z 2x 28BYJ-48 12V Stepper moto (modifyied like in the description: ) 3x Screws M3x10 4x Smooted Rods (you can use every length, just 2 pai per Axis) 6x LM8UU Bearings 1x M8 Rod (length depending on the Rods youre using, You will need 2 for the Y-Axis) 1x M6 Rod (length depending on the Rods youre using. You will need 1 for the X-Axis) 4x Bolts M6 8x Bolts M8 Last but not least, any kind of GRBL Controller (Uno Shiel, old 3D Printer Hardware.... ) You have to modify the Stepper moto from Unipolar to Bipolar, that we can use them with normal stepper drive. This is less work, than it sounds. Just open the blue Cover on the backside of the stepper, and scratch the trace on the PCB between the two conacts in the middle (on the red wire) and finally remove the red wire. Now you have a normal Bipolar stepper motor that you can use with every stepper driver Set the Current of the stepper drive to something around 0,09V or 0,08V to get a smooth working engraver without overheating. Dont tighten the Belts too much, otherwise the cheap gearbox iide will be damaged (i killed 5 moto with to tight belts, before i found out that this is a bigger problem) The X-Axis can be tighten by the M6 rod in the middle ( i made the holes long enough) As Software for engraving I´m using lasergrbl on a Virtual machine (linux user): Video of the working Laser in original Speed: