XY calibration worsening orientation of points 1 & 9
My PINDA placement and bed orientation is worse after running the 3.0.5 xy calibration.
Before running the xy calibration (or after resetting), the PINDA probe is perfectly centered in points 1&9 in the y direction, and just barely outside the right edge of both the 1&9 points (eh. pics uploaded from phone are upside down. So stand on your head!).
Runnning the xy calibration, I get the message that the XY is perpendicular. However, for both positions 1&9, the PINDA probe is now centered in X but well forward and out of the circle in Y.
That doesn't seem like expected behavior.
First question: why is the PINDA probe to the right of the circle? Is that a problem with needing to add a small strip to the part of the extruder body that hits the x end-stop? I've tried to move the end-stop over as far to the right as possible and can't get it any further.
Second question: If the xy calibration finds that my bed is perpendicular (which I painstakingly ensured by measuring diagonally and adjusting when rebuilding), would it be better not to do the xy calibration if it is going to erroneously reposition the PINDA probe?
Re: XY calibration worsening orientation of points 1 & 9
Curtis
1. Yes
2. You are not alone with this issue. This morning, just uploaded the 3.0.5RC firmware; "axes are perpendicular", but as with 3.0.4 beta, the points are now not in the circles. I presume that the inserts in the bed may not be positioned as accurately as the should be.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: XY calibration worsening orientation of points 1 & 9
Curtis
1. Yes
2. You are not alone with this issue. This morning, just uploaded the 3.0.5RC firmware; "axes are perpendicular", but as with 3.0.4 beta, the points are now not in the circles. I presume that the inserts in the bed may not be positioned as accurately as the should be.
Peter
Thanks, Peter. I thought for sure I was going crazy. Glad to hear that I'm not the only one, and looking forward to an updated firmware.
Re: XY calibration worsening orientation of points 1 & 9
I've just upgraded to 3.0.6RC and the problem still exists. I have adjusted the bed so it is perfectly centered in the 1 & 9 calibration points but after doing the XY Calibration the PINDA probe is sitting on the border, just as shown in the pictures above.
Is anyone else seeing this?
Re: XY calibration worsening orientation of points 1 & 9
Curtis,
today I discussed a similar issue with another customer. On his printer the XY calibration failed with an error message. The cause was a slipping Y pulley.
I have a feeling this may be your case as well. The XY calibration pushes the table to the Y end stop repeatedly and the calibration procedure exercises the X and Y axes quite a lot. If either the X or Y pulley slips, the measurements the XY calibration procedure makes are skewed. In your case it seems to me that the Y pulley slips or the Y motor skips steps before the calibration routine starts, which then shifts all the measurements in the Y direction.
I shall update the XY calibration routine to verify at the end of the calibration routine, that the printer reads the expected X/Y coordinates when the X/Y end stops are reached. This procedure would verify for both the skipped steps and slipping pulleys.
Vojtech
Re: XY calibration worsening orientation of points 1 & 9
Curtis,
today I discussed a similar issue with another customer. On his printer the XY calibration failed with an error message. The cause was a slipping Y pulley.
I have a feeling this may be your case as well. The XY calibration pushes the table to the Y end stop repeatedly and the calibration procedure exercises the X and Y axes quite a lot. If either the X or Y pulley slips, the measurements the XY calibration procedure makes are skewed. In your case it seems to me that the Y pulley slips or the Y motor skips steps before the calibration routine starts, which then shifts all the measurements in the Y direction.
I shall update the XY calibration routine to verify at the end of the calibration routine, that the printer reads the expected X/Y coordinates when the X/Y end stops are reached. This procedure would verify for both the skipped steps and slipping pulleys.
Vojtech
Vojtech, thanks for the diagnostic pointer. I'm in the middle of a long project right now but immediately afterwards will tighten the Y pulley and belt.