print fan rpm test failing
I just finished assembling the XL multi-tool. Immediatley after starting the self tests, the print fan rpm test fails with no diagnostic information. I can see both fans spinning on the 2 tool changers. I'm new to all this so I'm not sure what I should be looking at. I'm pretty sure I assembled everything correctly. My firmware is 6.2.6.
Does anyone have any suggestions how to resolve this?
RE: print fan rpm test failing
This is a common issue, i executed the test on my XL yesterday and all five print fan rpm tests failed.
After digging a bit in the internet, i've noticed that prusa recommends to remove the fan shrouds during the test and add it again afterwards.
https://help.prusa3d.com/article/selftest-failed-xl-multi-tool_686941
Here is a good video example of it, this fixed the issue for me and the test finished successful
https://www.youtube.com/shorts/Lfm1C1aRYNw
Hope this helps, best regards
RE: print fan rpm test failing
I had exactly the same issue this weekend after installing a new dwarf board. I found if you switch the fan type from black to silver the hotend fan will pass. I then tested with out a shroud and found that the print fan will pass that way, but I read of someone else using a hoover to help increase the fan speeds so I put that at the nozzle and it worked.
Hope that helps. I eamiled tech support cause it seems the support team are off this weekend, (maybe getting ready for next weeks reveals)
All the best
RE: print fan rpm test failing
Just wanted to confirm, what Walsercl suggested worked for me as well. I recently built the 5TH. It passed everything on startup, but after the recent update in firmware (6.4.0+11974), it wanted me to run the tests again. The print fan test failed on TH's 1,2,3, & 5. Took all the shrouds off and ran it again. All passed.
Thanks for the fix!