On Tue, 5 May 2026 at 17:25, Peter Wallace <[email protected]> wrote: > The most common causes of no motion on step/dir systems with our hardware are: > > 1. Too short step times (use double the manufacturers minimum value as a > starting point) > > 2. wiring errors (polarity, step/dir swapped, using differential wiring > whan ont applicable etc, etc) > > 3. Too high accel limits so immediate stalls
I would add: 4. Drive disable inputs wired as if they were enables. With most stepper drivers you can leave the enable disconnected and save some IO pins and wires. Drive enable is of limited use on a stepper driver (they can't run-away). The way to tell is to check if you can freely turn the motors by hand with the system powered up. If you can then the drives are disabled. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
