I apologize for the lame title but I am not exactly sure how to describe this behavior. This is a new custom conversion of a Mini-Mill using ballscrews and steppers. I'm driving Nema 23 269 oz/in steppers with 24 volts on 8825s. The electronics is a Protoneer running GRBL. Install and setup seemed to go OK. I know I could do a little more tuning on Steps/mm and I am still unsure about acceleration.
I am using bCNC on the RaspPi OS to drive the machine. Manual controls appear to work correctly - jogs jog - home homes.
For my first cut, I drew up a 50mm square pocket 10mm deep in Fusion 360 and used 2d adaptive in CAM to make the cut. I posted using the Fusion 360 "Grbl /grbl" processor.
When I run the job, the machine motion does not match the displayed path in bCNC, even cutting air. The adaptive starts with a ramp-in in a spiral motion. The machine initially moves the table in a circle, but then it will run only the X axis briefly and then only the Y or neither at all. All of this in the first 20 or 30 seconds of cut. If I run the machine with the spindle off, I hear electronic noise from the cabinet even when the table is not in motion.
I am brand new to this so I am sure I am missing something obvious. Does anyone have suggestions on where to start troubleshooting?
Thanks in advance,
Tim