Question about G29 S2

[fcwilt]

Hi,

I have added a Z probe to my CoreXY printer for the first time and it seems to be working fine.

But it has lead to a few questions:

1. Does homing Z ignore any mesh compensation height map that may be loaded?

2. If the answer to #1 is NO should I have a G29 S2 command in my homeZ.g file?

3. Does executing G29 ignore any mesh compensation height map that may be loaded?

4. If the answer to #3 is no should I execute a G29 S2 command before the G29?

Hope that makes a little sense because I am a more than a bit confused about the various potential interactions.

Thanks much.

Frederick

[dc42]

1. No, it doesn't ignore it.

2. If you home Z at the same XY point as one of the points in the G29 mesh, then the height error in the height map should be zero at that point. Alternatively, use G29 S2 to clear the height map before homing Z, and reload it afterwards.

3. G29 S0 (or just G29) clears the existing height map before probing starts.

[fcwilt]

@dc42 said in Question about G29 S2:

1. No, it doesn't ignore it.

2. If you home Z at the same XY point as one of the points in the G29 mesh, then the height error in the height map should be zero at that point. Alternatively, use G29 S2 to clear the height map before homing Z, and reload it afterwards.

3. G29 S0 (or just G29) clears the existing height map before probing starts.

Thanks very much. That is what I needed to know.

Frederick