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« on: January 12, 2022, 09:32:44 PM »
hi All.
I've built a cnc mill out of an old G0484. It's a 3 axis with clearpath servos and an ESS for the motion controller. This is all run from Mach 4 on a windows 10 PC.
I have a random but not so random movement issue occurring and cannot find the source.
What happens is when traveling in X plain, it will rapid move times 10 speed. Let me try to explain.
1. I use Fusion 360 CAM personal use, so the only rapid moves aloud are basically the G53 moves. Therefor no rapid moves should happen during movements from point A to point B, It should all be G1 moves.
2. I have rapid (G0) moves on Mach 4 set to 10%, G53 moves move at 10%. These random X moves (that are meant to be G1 moves) will happen at 100% rapid. If I have rapid on Mach4 set any higher than 10% and these X movements occur, it will trip the current overload on the servos and halt all movements but the gcode will still be running on Mach4.
3. It only does it to X movements. Not Y movement and not XY movements. And has never happened to Z movements ether.
4. This doesn't happen on all X movements. It only happens on transition moves. Sometimes it wont happen at all on a Gcode program. When it does happen, it is the same every time the program is run. I could run two programs back to back (program A and program B), it could miss behave on program A and run fine on program B. I could loop these programs all day and it will always happen on program A and never happen on program B.
It sounds like it's the Gcode right?? I'm only learning to read gcode but I can't see anything obvious. Post processor maybe?? Has anyone ever struck this before?
I've attached the latest program it did it on. Drilling holes in a PCB. It rapid moved fast all X transition moves, even though rapid on Mach4 was set to 10% and there shouldn't be any rapid transition movement to begin with according to Fusion360.
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