Re: [Emc-users] Mysterious direction-signal changes

[Ed N. <ed....@po...>]

> =A0any additional info you can provide would be helpful.

Although the screen shot showed a single step pulse in the=20
middle of the direction glitch, this is not necessarily the=20
case. What pointed me toward the problem was watching the=20
stepper motor knobs spin the wrong way: up to half a turn=20
before the motor goes THUNK and abruptly spins the correct=20
way with (obviously) no decel or accel ramping.

So, in general, this is not a subtle problem where the=20
direction signal is off by a smidge, no big deal, just one=20
step the wrong way.

Unfortunately, it's also not very frequent and capturing all=20
that HAL trace data will take a while. Worse, the data=20
probably won't all be from the same oops.

More later...


=2D-=20
Ed