Question about M558 A and S parameters
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Hi,
For those using a BLTouch (mine is v3.0) with the M558 A parameter greater than 1 what are you using for the S parameter (tolerance)?
Thanks.
Frederick
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Yes.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_Set_Z_probe_type
Annn Maximum number of times to probe each point, default 1. Maximum, as of 2.03, is 31. Setting M558 A parameter to anything >31 set it to 0 instead of to 31
Snnn Tolerance when probing multiple times, default 0.03mm -
@phaedrux said in Question about M558 A and S parameters:
Yes.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_Set_Z_probe_type
Annn Maximum number of times to probe each point, default 1. Maximum, as of 2.03, is 31. Setting M558 A parameter to anything >31 set it to 0 instead of to 31
Snnn Tolerance when probing multiple times, default 0.03mmOK that was confusing.
I asked what value folks are using for the S parameter and your answer was "yes".
I don't think the firmware will accept "yes" as a value for that parameter.
Frederick
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Well the default is 0.03 and I doubt most people will change the default.
For what it's worth I use 0.003, which I came upon by looking at the repeatability of the probe. This is quite a bit tighter than the default and I do have occasions where it will probe several times in a row. Usually it's only 2 or 3.
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@phaedrux said in Question about M558 A and S parameters:
Well the default is 0.03 and I doubt most people will change the default.
For what it's worth I use 0.003, which I came upon by looking at the repeatability of the probe. This is quite a bit tighter than the default and I do have occasions where it will probe several times in a row. Usually it's only 2 or 3.
Is the BLTouch v3.0 generally able to do better than 0.03?
The value seems a bit large given that it is 30% of a 0.1 layer, the smallest layer height I use.
While I'm new to this mesh compensation feature it would seem that it would be good if the measurement accuracy was more along the lines of 0.01 or 10% of a 0.1 layer.
Am I worrying needlessly and 0.03 is just fine?
Am I expecting too much from the BLTouch?
Thanks.
Frederick
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Note the extra 0 in the value I use.
Check your repeatability by running g30 s-1 as you would during calibration multiple times and see what your deviation is.
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@phaedrux said in Question about M558 A and S parameters:
Note the extra 0 in the value I use.
Check your repeatability by running g30 s-1 as you would during calibration multiple times and see what your deviation is.
Yes I did notice it was 0.003 which seems sensible.
I will do as you suggest.
Thanks.
Frederick