I am experiencing a persistent firmware bug with my brand new H2S printer.
Issue: Every time I attempt to run the “Cold Pull Assistant” from the printer’s UI, the process fails immediately at Step 1 with error code: [0300-4000 044015] (Z-axis homing failed).
Details:
The standard homing procedure (before printing) works perfectly fine every time, so this is not a mechanical failure or a dirty sensor.
The printer is running the latest firmware version 01.02.00.00.
This error appears to be specific to the “Cold Pull Assistant” routine, suggesting an incorrect Z-offset calculation or a logic bug in this specific firmware module.
The printer stops the task before the nozzle even reaches the bed for the pull sequence.
Thanks for the tip, Jon! That did the trick. I was stuck in the loop of power-cycling the machine every time it failed, but running it a second time worked perfectly!
Can confirm the issue. For me it seems to be when the heat bed is more than half way down towards the bottom. If I move it up manually higher than half way it works fine. If I start the cold pull with the bed more than half way down the bed acts as if it’s hitting the nozzle and keeps trying. Then the error pops up.
It seems this issue was reported in the beta on April 15th, and the firmware was released 5 days later. Seems the fix didn’t make it in that version.
The same issue appeared in the last beta of the H2D, and was eventually fixed in there.
In my H2D the workaround was to make sure no homing position was known.
So a power cycle on the printer and directly a cold pull did not give any issues.
