Print head is not "parked" correctly - solution

U1 Toolchanger
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If any of print heads is not “parked” correctly during calibration or print (see photo), one of the reason is wrong re-tension of belts.

unparked_head
unparked_head1080×1080 364 KB

How to fix it?

  1. Switch the printer off
  2. Place the print head manually to the position (pp. 38-48 of Quick Starter Guide)
  3. Re-tension the belts (pp. 50-51 of Quick Starter Guide) again
  4. Switch the printer on and repeat the calibration.
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You can submit a ticket at the same time in case the technical staff or fellow users in the forum don’t respond promptly.

or see the wiki！Snapmaker U1 | Snapmaker Wiki

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This issue has appeared during initial calibration and this first print was possible after 2,5 hours of repeated calibration. Frankly, one simple note* is missing (in my opinion). Your tech support is great and very helpful in this case, they provided me this solution. I just share it here for other owners because is very stressfull to wait for help when your great new printer has such issue during first minutes :wink:

Anyway, very important note: Snapmaker support is extremely helpful, competent and fast. Thank you for your great work!

*Yea, and the suddested note for your wiki/guide/error message:

If the print heads are not captured correctly during printer calibration, please repeat the previous step (re-tensioning of belts) first.

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Just got mine… Performed several manual belt tensioning. Ugh… First time went the wrong effing direction. First attempt at calibration and nozzle 4 wouldn’t grab. Now it gets hung up on returning nozzle 2 and won’t go to nozzle 3. Starting to regret this machine already…

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Does the Snapmaker U1 really need an emergency stop button too…?
I haven’t even been able to print due to calibration errors.
It’s already full of errors, and I’m starting to think it’s just Snapmaker after all :frowning:

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Same, I got my printer at 10am this morning… It is now 7pm… I can’t get through a simple calibration due to toolhead errors. I’m so pissed…

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U1 toolhead swapping anomaly during first-time setup after unboxing | Snapmaker Wiki

You can refer to the latest page guidelines on WIKI to troubleshoot the issue!

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U1 calibration anomaly 0003-0530-0000-0000 0003-0530-0001-0000 0003-0530-0002-0000 0003-0530-0003-0000 0003-0530-0000-0001 0003-0530-0001-0001 | Snapmaker Wiki

You can refer to the latest page guidelines on WIKI to troubleshoot the issue!

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Just note (even wiki is very good in this point) : don’t be affraid to loose screws more than less, be slow with the motions and higher number of movements is better than lower.

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I appreciate that, perhaps I was rotating too quickly. I’ll try again going slower, good call.