My New Chonk build rear z motor doesn't move during homing.
The bed lowers with all three motors at the start of the homing sequence but then after it checks the x and y motor it goes to lift up for the z probe but the rear doesn't move and the bed binds up. https://youtube.com/shorts/BwLV4EklHzw
11 Replies
You should probably post your printer.cfg... I also would be interested to see a pic of your MCU and how's it's wired
I'm also thinking that doing a stepper_buzz on Z0 and Z1 might be telling, but I don't remember the actual structure of the command (and the stepper naming convention it needs)
Looks like the stepper_buzz commands shoudl be -
STEPPER_BUZZ STEPPER=stepper_z
STEPPER_BUZZ STEPPER=stepper_z1
Although maybe that should be z0 and z1 ? The universality of the configuration files has me a bit confused with this out-of-the-ordinary printer's Z configuration
Just going to drop this info in here... the only odd thing I noticed looking at the printer-definition.json of the V-Chonk is that axis "z" is missing the performanceMode entry that all other axes seem to have
Also, I believe the skrat config that seems like it should be used is the standard config.cfg and specifically NOT the config-3z.cfg (in case that somehow attached itself to the config)
skrat reference pinout: https://github.com/bigtreetech/SKRat/blob/master/Hardware/BIGTREETECH%20SKRat%20V1.0-Pin.pdf
ZMA= Left Z stepper, ZMB= Right Z stepper, and E0M= Rear stepper
😅
Hmmmm, all that looks good as far as I can tell. And your wiring sounds like it's correct to what I'd expect... sorry, but it sounds like something more complicated than I can help with. 😕
well thanks for the try. Im at a standstill with this build then.
Hmmm... I wonder if you're using a toolboard, couldn't it be wired like a VC3/4 with all independant Z steppers? (skipping ZMB)
Im not following. I have an ebb42 on it so the E1M slot is open. From the picture I saw of Miguel from ratrig Chonk he doesn't run a toolboard and has the extruder motor in E1M.
Solution
Ended up being a bad driver. Case closed