The print head (nozzle) crashes into the bed at the beginning of prints

[03thmcmullant]

Printer Hardware Summary

Model: Creality Ender 3 V2
Mainboard: V4.2.2
Main Chip: GD32F303 (clone chip, not the original STM32)
Bed Leveling Sensor: CR-Touch
Firmware : Firmware 20260106

The print head (nozzle) crashes into the bed at the beginning of prints

[csanii123]

Does this happen every print or just randomly? The reason I ask is that I have an E3 with a v4.2.7 board and every once in a while it will have the nozzle crash into the bed when it goes to lay down the purge line at the start of my print. I can then restart the printer and print the exact same file and have no issues at all. It doesn't happen often and I haven't been able to detect the cause.

[mriscoc]

It may be due to an unstable connection with the CR-Touch probe. Also try disabling the probe's HS mode.

[Ximenoworks]

I had the same thing but randomly. I notice tramming is a hit of miss adventure. Mine has a big tree tech mini E3 V3.