Best posts made by Nahsiro

@droftarts I'm on 3.2.
@tekkydave @fcwilt You're right actually, turns out I was doing it wrong. 700 mm/min is too much for my Z axis using 600 mm/min is working fine.

@fcwilt I actually set all the probing move speed a lot lower when I wasn't printing a lot but it was apparent to some extent. I kinda just lived with it because it doesn't skip steps when the rods are clean and lubed. Also, things like the dive height also affected how quickly it would start to loose steps. A short dive height < 5mm worked better. And probing a single point was not as dramatic as multiple points. My max z-axis speed is probably somewhere between 600 and 700 mm/min, so depending on how much friction the threaded rods experienced, it would z probe fine or not.
I also only truly started to investigate when I started getting "motor phase may be disconnected errors".
I checked all the motor wires and found no issue there
Then I started visibly seeing step lost in Z. Plus I also wanted to probe faster and be hands-off as much as possible in the pre-print process.
Lessons learned:

• keep threaded rod lubricated (obviously)

• Read the fine print of my gcode commands and understand how they inter-relate

• give myself some room around the max limits of the machine in the config.

Thanks to you all for helping me learn a bit and solve this issue.
Thanks @dc42 for adding the note in the documentation.
@tekkydave I second having the z lift speed independent for probing.