@justine-haupt were you able to resolve the vertical banding? Did you find the reason for the vertical banding? I have a similiar issue.

@dc42 Yes thank you that makes sense, sorry that you needed to answer this trivial question.

Hello,

for a couple of months now, my stepper motors where wired in factory setting which is:

A+ A- B+ B-

They were turning so I did not think there were any issue.
However when I looked at the duet wifi schematic it turns out the wiring should have been:

A- A+ B+ B-

I then rewired the stepper motor and it was turning just like before. How is this possible? Shouldn't the stepper stall when the wiring was in the factory setting?

Well I found a work around. One can lower the bed using relative positioning (G91) and the when the printhead moves the z-height is adjusted again with the z-offset.

Hello StephenC,

I am very sorry for the late reply. Concering your last post, yes exactly that is true. I will share my build soon. Currently ironing out some issues.

Meanwhile DC42 I found a flaw with the z-offset of two nozzles or more. When swichting between the hotends the z-offset does not take affect until the next move which means that the when the printhead moves the z-offset is gradually adjusted. Is it possible to have to have some kind of command that would trigger the z-offset adjustment earlier,so that i can implement it in the tpost script?

Thanks.

Max

Thank you. This solved my problem

I am not sure how or where the Z-offset is stored, but it is only stored temporarily. This means after a restart, the values are lost, so my guess is that the offset is stored in the flash memory. Would it be possible to store the value permanently in the G10 command in the config file?

Hello DC42,

yes that would meet my requirements. Is it then possible to to store that z-offset value in G10 in the config.g file ?
Thanks again for your fast response.

Hello DC42,

we met at the TCT Show and it was a pleasure talking to you.
We talked about a automatic z-offset calibration method, when one has 2 or more Hotends.
Would it be possible to integrate a automatic z-offset calibration, when using a direct contact probe into the firmware?
So I have 4 Hotends and I would like to have command where the same position is probed by all four Hotends and such the z-offset is determined.

Thank you in advance for your reply.

Kind Regards

Max

That is great news. Thank you so much. I will test the beta then.