Running plasma table with grbl 1.3 on arduino with these stepper motors - Y - https://www.amazon.com/gp/product/B081VD4C28/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 X - https://www.amazon.com/gp/product/B07Y81FF3V/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 My issue is when I cut a 4" square for example, it's about an 1/8" or more out of square (on all corners). The square cuts and all points connect , but it's like a parallelogram instead of a square (slanted square). I can cut straight lines that are parallel in both directions, and the correct length so it's puzzling me a bit. My x motor is making some humming noises (even when idle, not moving), so I'm replacing that since it's cheap enough. I tested this motor with a voltmeter and the resistance matches on both pairs of leads. Could there still be something wrong with this stepper? I've also swapped out the arduino and the stepper motor controllers , with exact same results. Thanks!
Maybe, I would expect to see this issue in other cuts I've made, it seems odd to me. It seems like only perpendicular lines that should be 90 deg from each other - aren't. Seems like it wasn't doing this when I first set the machine up couple months ago. But now I'm questioning everything smh. I've done several 10-15" size designs with this machine that looked fine, they were art designs, not just basic squares.
adding gcode for the 4" square - anything wrong with? (Made in : Autodesk CAM Post Processor) (G-Code optimized for Grbl 1.1 / BlackBox controller) (OpenBuilds CNC : GRBL/BlackBox) (Post-Processor : OpenbuildsFusion360PostGrbl 2.cps V1.0.32) (Units = inch) (Laser UseZ = false) (Laser UsePierce = false) (Drawing name : Untitled) (Program Name : 4-inch-square) (1 Operation (1 : 2D Profile1) ( Work Coordinate System : G54) ( Tool 1: Plasma Cutter Diam = 0.0315inch) ( Machining time : 16 sec) G90 G94 G17 G20 (Plasma pierce height 0.0393701) (Plasma topHeight 0) (Operation 1 of 1 : 2D Profile1) G54 (Plasma cutting with GRBL.) G0 X-2 Y-2.0591 M3 S1000 G4 P1.8 G1 X-2 Y-2.0197 F60 G2 X-2.0197 Y-2 I0 J0.0197 G1 X-2.0197 Y2 G2 X-2 Y2.0197 I0.0197 J0 G1 X2 Y2.0197 G2 X2.0197 Y2 I0 J-0.0197 G1 X2.0197 Y-2 G2 X2 Y-2.0197 I-0.0197 J0 G1 X-2 Y-2.0197 M5 M5 M30
resolved! thanks @Peter Van Der Walt for quick reply. 3/8" bolts were snug on the x gantry, but it had moved!
