Stepper motors noise when enabled without moving.

My z front left is making a weird noise once enabled. It's the only one that makes this noise. Other motors are quiete when not moving... is it normal ?
10 Replies
harsh-harlequin
harsh-harlequin14mo ago
Some noise while holding is normal if not in stealthchop mode
shifubrams
shifubrams14mo ago
thank you. i was worried
ptegler
ptegler14mo ago
....some say don't..but I set each steppers stealthchop to 1. It cuts down on that tiny high pitch whine you can here while idle ymmv
shifubrams
shifubrams14mo ago
Stealthchop is not enabled on mine
ptegler
ptegler14mo ago
that's fine... adding stealthchop=1 will quiet them at idle
shifubrams
shifubrams14mo ago
i'll try that
ptegler
ptegler14mo ago
setting it to 1, as soon as they move at all, your right back in normal (and desired) spreadcycle mode.
shifubrams
shifubrams14mo ago
but in the klipper documentation they say it can lead to issues changing that ... if it s not an issue i can live with the noise
ptegler
ptegler14mo ago
it's 'an issue' WHILE MOVING as it can skip microsteps. But not an issue NOT moving. As soon as you move you are right back in spreadscycle. Klipper or no Klipper, this is universal across almost every stepper driver system. My massive CNC router table running 6A 48V 942 oz/in NEMA 42 steppers are configured this way. Without it you can SEE the stepper motor hum in the metal frame work at an idle.
shifubrams
shifubrams14mo ago
so i just specify stealthchop_threshold: 1 seems like it is already in the default config lol i changed to performance settings and set the stealthchop_threshold: 1 and it's nicely quiet on idle thanks
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