Stop in middle bed compensation or z-offset wrong when rebooted

rew3

Hello there,
I am writing because sometimes my duet 2 wifi with RepRap firmware version 3.3 goes a bit crazy sometimes.
Usually everything works perfectly, but sometimes happens one of these 2 things:
1)The printer stops the bed mesh compensation in the middle of the procedure and with the probe down starts to print (touching the bed), once it even went out of the bed bending a bit the bl touch probe.
2)The bed mesh compensation looks like it worked ok but starts to print 3mm higher or sometimes lower than it should.

I don't understand what is wrong with it, maybe the bl touch? I think it's connected to that but for a lot of months it worked ok without any problem.

Phaedrux

Have you seen it doing this?

Can you tell if the probe is triggering incorrectly?

rew3

@phaedrux yes, I saw it multiple times now.
from what I remember the probe looks like it's triggering ok.
Ah yes and the problem persists even changing from a duet 2 maestro (that was mounted before) to a duet 2 wifi

rew3

could anyone help me? I would still like to understand why I had this problem. I waited for an answer but no one answered me

fcwilt

@rew3 said in Stop in middle bed compensation or z-offset wrong when rebooted:

could anyone help me? I would still like to understand why I had this problem. I waited for an answer but no one answered me

It's hard to say when it comes to problems that occur now and then.

Does the wiring to the BLTouch run along side wiring to any stepper motors? Sometimes the BLTouch wiring can pick up noise and malfunction as a result of the noise.

Please post the M558 and G31 commands used to configure your BLTouch.

Frederick

rew3

@fcwilt
Yes, the wiring to the BLTouch runs alongside the extruder stepper motor's cable in the same cable chain. (it was quite tight before now I bought a wider one because the cables were a bit too much near).

this is how I configured the commands.

M558 P9 C"^zprobe.in" H5 F120 T6000                
G31 P500 X0 Y-39 Z0.8

fcwilt

@rew3 said in Stop in middle bed compensation or z-offset wrong when rebooted:

@fcwilt
Yes, the wiring to the BLTouch runs alongside the extruder stepper motor's cable in the same cable chain. (it was quite tight before now I bought a wider one because the cables were a bit too much near).

this is how I configured the commands.
M558 P9 C"^zprobe.in" H5 F120 T6000                
G31 P500 X0 Y-39 Z0.8

Thanks.

If it were me, as a test, I would find a way to remove the BLTouch wiring from the cable chain to see if the problem goes away.

Frederick