Zmin Probe G38.2 Not Working

Question

Zmin Probe G38.2 Not Working

Opened this issue 5 years ago · 5 comments

swpaxton66 commented 5 years ago

Hello!

I have a V0.97 TinyG with firmware build 440.20.

I had a touch plate Z probe setup working. Now it doesn't work.

I've confirmed no broken wires by continuity test.

I've set zsn to all possible settings.

Nothing fancy just a roach clip and a touch pad. When there is continuity it should trigger the tinyG to set Z zero. It just keeps on chugging.

Anyone have any ideas?

I'm thinking a board issue as it was working in the past. As far as I know I didn't change anything to affect it.

Thanks.

Answer 1 · 2019-08-03T21:54:03.000Z

Forgot to mention.

st = 0

Answer 2 · 2020-04-15T10:45:23.000Z

G38.2 is used for auto leveling. Should you be using G28.2 to Home Z using your touch plate?

I am not clear what "It just keeps on chugging" means

Answer 3 · 2020-04-15T15:41:29.000Z

Hi thanks for the feedback. That was a typo on the GCode command. "keeps chugging" = means that once it contacts the touch plate it just keeps moving the z-axis down and doesn't register the hit.

Answer 4 · 2020-04-15T20:27:27.000Z

Give https://github.com/synthetos/TinyG/wiki/Homing-and-Limits-Description-and-Operation a read.
Do you have Z min set as home as well as NO (st=0)?
Otherwise, it sounds like you are using this process https://github.com/synthetos/TinyG/wiki/Automatic-Z-Homing-When-Milling-PCBs
Here is a thread using G38.2 probing https://openbuilds.com/threads/touch-plate-sends-z-axis-in-the-wrong-direction.11643/

Answer 5 · 2020-04-15T23:32:28.000Z

Thanks On Wednesday, April 15, 2020, 04:27:43 p.m. EDT, Carl McGrath <notifications@github.com> wrote: Give https://github.com/synthetos/TinyG/wiki/Homing-and-Limits-Description-and-Operation a read. Do you have Z min set as home as well as NO (st=0)? Otherwise, it sounds like you are using this process https://github.com/synthetos/TinyG/wiki/Automatic-Z-Homing-When-Milling-PCBs Here is a thread using G38.2 probing https://openbuilds.com/threads/touch-plate-sends-z-axis-in-the-wrong-direction.11643/ — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.