Z-tilt adjust setup and dual z timing belt question

General Discussion
1

Basic Information:

Printer Model: Anycubic Kobra Plus
MCU / Printerboard: BTT SKR 3 EZ
Host / SBC
klippy.log

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Describe your issue:

I Just upgraded my MCU on my Kobra Plus to a BTT SKR 3 mini and it is amazing so far. Currently I have all the basics setup and the printer is running great so far. I am now looking into further upgrades to my Klipper config mainly the z-tilt adjustment. The kobra plus has the dual z steppers connected with a timing belt at the top of the z gantry. My question is, once I configure the z-tilt feature and have the z motors working independently, should the timing belt that connects the two at the top of the lead screws be removed? I’ve done some research on this and can’t find a clear answer. Thanks.

2

Hello @ObiTwo !

In the end, you only have a single stepper motor for the z-axes. So Z-tilt makes no sense. You need two independent Z-axes steppers.

Please attach the klippy.log to your next post.

3

thanks for your reply. the klippy log is attached. Just to clarify, the Kobra Plus come with two independent z-motors, however the stock config has the second slaved to the first z-motor. since the SKR 3 EZ has a 5th stepper driver, I can configure the second z-motor to move independently. The configuration settings are pretty clear, it’s just that I’m not sure if I need to remove the belt at the top of the z-screws to set this feature up.

klippy-2.log.zip (3.7 MB)

4

If you want to run them independently, you have to remove the belt. Else they are still coupled.

For homing you need either an endstop for each z-axes or one probe or bltouch.

Doing the Z-tilt adjust, you need the latter one anyway.

https://www.klipper3d.org/Config_Reference.html?h=pixel#z_tilt

5

Great, thanks for confirming. Also I do have a probe newly installed and working well.

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