NOTE Lines must not exceed 132 characters, and '#' characters mean what follows is ignored.Smoothieboard config for posterity (accessible from the D:\config.txt file off the smoothieboard To that end you have to edit some stuff to make it understand it's part of a laser cutter. things with spindles and extruders are what it expects to use by default. GRBL is fantastic for controlling CNC, 3D printer, and laser cutter hardware, but it's default uses aren't laser cutters. As of just getting the machine working lasergrbl seems to be the more approachable software. This laser cutter can work with any grbl compatible software, the most common being LaserWeb and Lasergrbl, though others exist, since it's runs on Gcode. Link to the EBAY page for the current LPS: Probably only meant to be used with IN and adjacent Gnd for potentiometer control. Use a discrete not gate to signal from an arduino, laser turns on with 0v, off with 5v. Short signal ground to WP to bypass water protection. Here's how the current pinout of the laser power supply (often just called LPS) is laid out.Ĭontrol Signal (Via potentiometer or PWM 0-5v) Oh, and the big red scary high voltage wire for the ~16Kv to power the tube itself from the flyback transformer. They all boil down to having the following pins though: Laser tube negative, Mains ground, 2 Mains AC inputs for Live and Neutral, Water flow protection, logic GND, Laser control (FIRE!), 5v, 24v, and "IN" for the center pin of a master laser output max power potentiometer. There are many slight differences in these supplies as far as their pin headers, labeling, and pinouts are concerned. The laser is powered by a generic 40w CO2 laser cutter power supply. The LPS puts out 24v of it's own, originally to power the steppers, but we've use a dedicated supply for better reliability. There are two power supplies, a 24vDC 12A supply for the stepper motors, and a high voltage Laser Power Supply.
LASERGRBL UNDEFINED FEED RATE SOFTWARE
This is adjusted with the power control dial on top of the cutter as well as in software if you're fancy. Make multiple cutting passes under 20mA if you need a deeper cut. Such heavy cutting significantly shorten's the tube's life, and they're expensive. THIS IS OLD, Needs updated for smoothieware board*.Configure to ~83 steps per mm at 1/8th microsteps. The X and Y motors are 400 steps per rotation nema17 motors. The control board is a Smoothieware Smoothieboard Above all, if the tube water is anything other than cool to the touch or doesn't look like water you'd be ok drinking, STOP THE CUTTER AND FIX IT.
LASERGRBL UNDEFINED FEED RATE CRACK
Sudden changes in coolant temp may be bad for the tube's life (don't toss a bunch of ice into warm cooling water, it might crack the tube). Also, using distilled water is preferable to tap as a cooling water since tap water can carry an electric charge when it's passing near the 16,000V of the tube and mess with the tube's efficiency/power. Keep it between cold and kinda-chilly if you're being so cavalier as to not use a thermometer. CO2 laser tubes live much happier and and longer lives if kept between 55-70 degrees F! Toss frozen water bottles in the cooling water bucket and keep an eye on that temp.
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