sensor alignment way off

calibration fails. Home position almost an inch off in x axis.

Can’t find home position. Have tried resetting and wizard several times. The build check passes.

Thank you!

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Hello Kurt,

If your PINDA probe is off the circle too much, then it’s usually caused by improper extruder assembly or overtightened belts. If you’re not sure what is causing it, then do not hesitate to contact our tech support.

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Hello, Thank you! You probably see my response to Mathieu, but I'll re-post here again...I've tried adjusting the PINDA up and down. And tried adjusting the X axis belt tension. It did seem a little tight. I did flash the firmware but not since I made the adjustments. I'll try that. Interesting thing... before I adjusted anything , the printer was trying to find the calibration point at the front left of the print bed. Now it's trying to find it at the back left of the print bed. Does that raise any particular flags? I also checked the printhead assembly again.

Thank!

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So I guess I just needed to push the bed back it's searching front left now. But still fails.

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I tried a new PINDA which did not help. However I did successfully get through calibration by ... folding the paper! Seriously!? The first layer test appeared to be flawless. On the other hand, printing has not been successful. Which appears to be aggravated by the seemingly spastic course the nozzle is taking.

Let the learning begin.

Cheers!

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Hey there! I’m not from the Prusa Support team but may be able to help.

Which printer are you using? If this is a MK2 or MK2S then this may be an issue with the endstops. For a MK3, the problem may be with belt tension. Check and make sure that you can’t press the x-axis belt down by more than an eighth of an inch or so. Also, make sure that all the wiring to the axis motors (x and y in particular) are intact, as that may be an issue, but not likely.

Can you move the extruder all the way to the left of the x-axis? If so, it’s not an issue with hardware. Well, not likely. Make sure all screws are tight, and especially in the y-axis where perhaps belt tension or the u-bolts underneath (at least for a MK3) are tightened so that there is no friction and you can’t wobble the build plate around.

I hope this helps, and good luck! If not, I will be back…

Mathieu

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Thank you Mathieu,

I think the build is good. Everything checks out and moves as it should. It seems like a firmware or software problem. Some things I’ve read have suggested modifying MIN MAX coordinates in firmware. That makes sense to me but I don’t have the experience to know. Haven’t had time to test that out yet.

Do you happen to know a way to stamp in a new zero point based on position of the printer head?

Thanks for your help!

K

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Oh, it’s the i3 MK3

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Hey there! I have no expertise in coding or modifying the firmware. I wouldn't touch that for now, mainly because most of the people who had this problem fixed it without changing firmware.

Often the support team echoes that you should reflash the firmware. Not sure if you've tried already, or that it does anything, but it's worth a shot.

Another thing that I forgot to mention last time is the PINDA height. Now that I know you have a MK3, it's good to try readjusting that sensor height. The problem you're having may not actually be related to the x-axis but instead to the PINDA. Perhaps try lowering it? Maybe it can't register the printbed.

I hope this helps!

Mathieu

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Hey Mathieu, I hear ya re: firmware. I've tried adjusting the PINDA up and down. And tried adjusting the X axis belt tension. It did seem a little tight. I did flash the firmware but not since I made the adjustments. I'll try that. Interesting thing... before I adjusted anything , the printer was trying to find the calibration point at the front left of the print bed. Now it's trying to find it at the back left of the print bed. Does that raise any particular flags?

Thanks again!

by

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kurt will be eternally grateful.
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