Posts made by bvandiepenbos

That is very interesting info. Thanks for sharing.
I think there is more going on with the printer than simply changing between a mag-ball joint and ball-cup+springs, essentially they both should be the same spherical joint.
Would you have the time to gather some data on probe trigger distances? comparing the two joints, probing a the same locations the auto-calibration uses.
I am very curious if probe trigger offsets are the same.

I did not notice if anyone is using the "h" parameter in their G30 probing?
This value is a height correction for probe trigger height.
What I understand is that your probe triggers at different heights depending on location of bed.
So, unless you measure actual trigger height at each probe location (and put those values in bed.g) I do not believe you are getting true calibrations, especially when tweaking down to such small deviations like you all are chasing after.
Furthermore, I suspect those trigger values change when you change arms, joints, or any other part of your mechanical linkage.

If you think you need to get closer than what auto calibration probing does, why not use mesh bed height compensation on top of the auto calibration??

If you know your real arm length, I don't think you should let auto calibration change that value.!

Also, probing at extremes of travel (140 mm radius) does not help, I feel the geometry out there is to unstable to be reliable (and worse the shorter the arms are) I get more predictable results at 125 mm radius.

@MiR:

Today I received my 360mm Haydn Rods. After a few rounds of 8-factor calibration I ended up with this:

Calibrated 8 factors using 16 points, deviation before 0.013 after 0.008

So it is definitely the Tricklaser Rods that are causing the calibration issues, I will ask the tricklaser guys if they have an idea why… (Or did anybody already contact them?)

What radius did you probe at?
What arm length did it auto calibrate to, does it match real rod length?
Does it print parts at true scale now?

What did you change to go from ball-cup pivot balls to mag-ball pivots?