My motors skip or stall — how do I diagnose it?

Question

Work through the usual suspects. (1) **Current too low** — bump Vref/run-amps up a little. (2) **Speed/accel too high** — lower max_rate and acceleration; a skipping motor that runs fine slowly is almost always asking too much too fast. (3) **Mechanical binding** — disconnect the belt and spin by hand; stiff spots, a misaligned rail or an over-tight wheel cause stalls. (4) **Wrong steps/mm or microstep mismatch** between firmware and driver jumpers. (5) **Noise/brown-out** from sharing the wire supply — separate them.

Isolate by testing one axis, slowly, unloaded. If a TMC2209 overheats it will pulse off — add cooling. Most 'random skips' are heat-versus-feed on the wire fooling you, or accel set too aggressively.

Mine motorer springer eller stopper — hvordan diagnosticerer jeg det?

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