Method to read Trig. Height returned from G30 S-1?

[JayT]

Hi,

Does anyone know how to save trigger height returned by "G30 S-1" in a variable ? or does it get saved in some object model parameter that can be read in a variable ?

[PCR]

@jayt you can save it via M500 i think

[Phaedrux]

Using G30 S-3 and M500 P31 would measure the trigger height and then save it to config-override.g

https://duet3d.dozuki.com/Wiki/G30
https://duet3d.dozuki.com/Wiki/M500

[OwenD]

@jayt

You probably want to read sensors.probes[].lastStopHeight if you want to use it in a macro or something
Or you might want trigger height depending on your use case

The full list is here
https://github.com/Duet3D/RepRapFirmware/wiki/Object-Model-Documentation

[JayT]

@owend :
@Phaedrux :
thank you for quick responses.

with G30 S-3 and M500 P31 would measure, save and is perfect.

If not, then I can try taking 4-5 points , save in variables, take average and set that avg value as trigger height to minimize the error?
How to save object-model data into a variable?

[Phaedrux]

@jayt said in Method to read Trig. Height returned from G30 S-1?:

How to save object-model data into a variable?

https://duet3d.dozuki.com/Wiki/GCode_Meta_Commands#Section_Variables

have you seen this?

[OwenD]

@jayt
Sounds like you're trying to do something like this

https://forum.duet3d.com/topic/22139/macro-for-automatic-calibration-of-bl-touch

You may have to modify to suit your machine and requirements

[JayT]

@owend :
Thank you for the reference. looks like a good base for me.

@Phaedrux : thanks, I missed the global var example earlier. Now I see how its read.
You can close the thread as solved, As I understand how to read object model variables and where to look for the available variables.