First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect
 
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First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect  

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cubeasic
(@cubeasic)
Active Member
First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

Hello, 

I just finished building the Mini+. When running the assistant (Firmware 4.4.1) all tests pass until the XYZ-axis calibration starts. 

The display says: 

>>>>>

Checking Axis (in German)

X-Axis

Y-Axis

Y-Axis

>>>>>

Then the controller suddenly reboots and gives error 12301 after reboot (Red Screen with QR-Code): It says the superPINDA sensor is probably defect.

I did all the tests recommended in the "check PINDA-sensor" chapter, and it seems to work just fine: Red light goes on and off with metal in front, no breaks while moving across the bed, all seems fine. When I start "Calibration -> Bed Levelling" the 16 points seem to go through ok, while the red light goes off and on on each point.

 

The problem it reproducible every time by running the Assistant or Starting "Calibration -> Self Test" and terminates with reboot on the above mentioned point.

 

My questions:

1) What can I do? 

2) At which height is the SuperPINDA-Sensor supposed to trigger (going from 1 to 0). For my setup the is the case around 2.5 to 3 mm above the bed. I set the SuperPINDA to the recommended height (one credit-card height above the nozzle) but I am not sure if this is correct. First: There are conflicting informations on which height to set (the built-manual 1.08 says to use the center of the zip-tie, the support document says to use the tip of a zip-tie, maybe this changed over time). I tried different heights and none seem to work. 

3) Should I go higher with the SuperPINDA or lower? Can something break if I set the sensor too high or too low? In my case, after the (probably successful) bed nivelling, the nozzel touches down on the metal plate on the heat-bed, still being on point 16. Is it supposed to touch down and make contact? It seems odd, something could break. 

4) Does the printer "know" that my sensor triggers around 2.5-3 mm above the bed? Does every sensor have the same sensitivity?

5) Is the functioning of the superPINDA and its integration into the system explained in more detail somewhere?

 

Thanks in advance

Florian

 

Best Answer by René:

>> The author says the two trapezoidal nuts under the Y-axis thread should not be too tight. Which one are those?<<

See the mini construction manual step 26

Posted : 04/04/2023 6:59 pm
jseyfert3
(@jseyfert3)
Reputable Member
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

1) I'd suggest a factory reset followed by re-flashing the firmware. You'll need to use the alternative flash method here. This just to rule out a bad firmware.

2) Don't worry about this. Start with the credit card height. Or zip tie. When you do the 1st layer calibration, if you reach -2 and the nozzle is still too high, simply move the SuperPINDA up by a little bit and re-do 1st layer calibration.

3) No, the nozzle isn't supposed to touch the bed. I had some weird height issues, and the nozzle crashed a few times on my Mini, and it seemed to be cleared up after a factory reset and a re-flash of the firmware.

4) No, the printer doesn't know the height the sensor triggers, and different sensors are different. That's why you dial in the Live-Z manually during 1st layer calibration and (if needed) the Tune menu during printing. The Live-Z is all the printer knows. Side note: The new MK4 printer uses a load cell in the print head, and taps the nozzle against the sheet, and knows when the nozzle touches, thus eliminating the need to manually adjust the Live-Z.

5) Not sure. Is there something more you wanted to know?

Posted : 05/04/2023 2:51 am
cubeasic liked
cubeasic
(@cubeasic)
Active Member
Topic starter answered:
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

Hello, 

thank you for the quick and excellent help. It really was a bad firmware apparently, after multiple re-flashs with 4.4.1 I downgraded to 4.4.0 and everything went smoothly. 

1) Downgrade to 4.4.0 did the trick.

2) I just used "some height" now. 

3) Thanks for the information.

4) Ahh. I haven't reached that part yet. But that makes it clear.

5) Your answer 4)

Filament loading will have to wait until tomorrow. 

 

Best

Florain

Posted : 05/04/2023 6:18 pm
jseyfert3
(@jseyfert3)
Reputable Member
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect
Posted by: @cubeasic

Hello, 

thank you for the quick and excellent help. It really was a bad firmware apparently, after multiple re-flashs with 4.4.1 I downgraded to 4.4.0 and everything went smoothly. 

1) Downgrade to 4.4.0 did the trick.

2) I just used "some height" now. 

3) Thanks for the information.

4) Ahh. I haven't reached that part yet. But that makes it clear.

5) Your answer 4)

Filament loading will have to wait until tomorrow. 

 

Best

Florain

Just one more clarification. When I say "don't worry about the height" I mean either a credit card or a zip tie is fine, and a tiny difference in height isn't going to cause an issue. But if you stick the sensor much higher than that, the nozzle will dig into the bed because the sensor too far away to trigger before the nozzle hits. So lower to start is better from that regard. I'm pretty sure I just used the middle section of one of the zip ties that came with my printer?

Posted : 05/04/2023 11:49 pm
cubeasic
(@cubeasic)
Active Member
Topic starter answered:
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

Alright, I have to make a correction to my previous post. The problem persists.

Since I just used "some height" of the Superpinda sensor, I set it to a correct zip-tie height again. Now the XYZ Stage tests fails again on both the old and the new firmware.

The test either fails initially, or at the 3rd Z-axis test. 

It is clearly visible, that the superpinda activates and deactivates during initial zeroing, So the sensor works.

At first the QR-code link on the error screen did not work and would always refer me to the main-homepage, but today it did work and show the correct error page:

https://help.prusa3d.com/de/article/referenzfahrt-fehler-12301-mini_382501

The one comment below stated that he had the same error, and the reason were too tight screws, that prevented the Z-Axis from moving with low enough friction.

This causes the referencing-movement of the Z-Axis too have too much difference between the two reference runs, and hence the calibration aborts.

I suspect, that when the calibration run did go through, by accident the calibration run produced good values.

However, I do not really understand what screw might be responsible here. 

The author says the two trapezoidal nuts under the Y-axis thread should not be too tight. Which one are those?

 

Thanks for any help.

Florian

 

Posted : 06/04/2023 9:10 am
Hello
(@hello)
Noble Member
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

The black part that is screwed by some screws on the printed part on the thread rods and I believe you mean z axis not y see link for part https://www.prusa3d.com/product/trapezoid-nut/

Please help me out by downloading a model it's free and easy but really helps me out https://www.printables.com/@Hello_474427/models

Posted : 06/04/2023 10:15 am
cubeasic liked
René
(@rene-3)
Reputable Member
RE:

>> The author says the two trapezoidal nuts under the Y-axis thread should not be too tight. Which one are those?<<

See the mini construction manual step 26

Posted : 06/04/2023 12:12 pm
cubeasic liked
CamDavidsonPilon
(@camdavidsonpilon)
New Member
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

I'm having the same problem. Squared everything well, replaced the PINDA, and still no progress. However, I just loosened the screws pointed out above, and things are looking promising. 

Posted : 06/04/2023 4:17 pm
cubeasic
(@cubeasic)
Active Member
Topic starter answered:
RE: First Run: Assistant fails during xyz-calibration (bed levelling) with reboot and Error 12301 - SuperPINDA probably defect

🙂 Now it works.

Thank you for the hint about the correct screw.

The OP of the comment I referred to indeed wrote "Y-axis". But the correct part is the circular metal-part fixing the X-axis to the Z-axis thread from below.

The screws were not overly tight before but the hint in the construction manual ("Do not over tighten the screws") should be taken seriously. Now I just tightened them very lightly, and the XYZ-axis test pass reliably on both old and new firmware.

Hopefully this is resolved now. Thank you for the great help.

 

Posted : 06/04/2023 4:21 pm
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