Filament gets stuck repeatedly during printing  

I tried to print the bonkers benchy with the supplied black Prusament PLA sample

Prusa shouldn't have included that file with the rest - it's a party trick, not a test file.  The vanilla Benchy is a (sometimes) useful test file and most of the other files provided are good for first prints.  It's not worth printing the regular Benchy until after the first monthly maintenance session when the printer will have run-in and any issues exposed can usefully be addressed.  The Bonkers Benchy isn't worth printing in itself, it is incredibly unlikely to look good, it is considered a win if it even prints in one piece ... reserve it for a few years time when you are supremely confident in your machine and you wish to impress 3D printing friends with lesser printers.

Caveat: I have never printed a Benchy of any sort, I have never felt the need.

Check your extruder idler pressure.

Cheerio,

RE: Filament gets stuck repeatedly during printing

Same here–never printed a Benchy in my life and never will. 

RE: Filament gets stuck repeatedly during printing

Let us differentiate between the filament stuck, when no filament is coming out filament stuck error.

1. The filament stuck error is based on the loadcell filament push force monitoring so when you switch it off via the settings menu, the error should not appear in my opinion. The stuck error could be recognized also at the moment the insufficient nozzle temperature, the filament pushes the on the loadcell to much, which leads to filament stuck error. Or there is a FW bug, which drifts the loadcell triggering threshold to be too sensitive.

2. the real filament stuck could be caused by lower than required nozzle temperature. Be aware sometimes the nozzle purge temperature could be different (set in FW) than the printing temperature (set by slicer)  so the nozzle is not heated enough.

Printing in the case especially PLA or PETG can lead to the filament preheating before it enters the extruder gear. This moment the filament between the extruder gear and the idler is not solid enough and the gear clicks creating a dent on the filament surface. 

The low  idler force against the extruder gear can also lead to clicking and dent generation.

The case is to print warping stuff like ABS, PC , ASA etc.  Do not close the case while printing PLA, PETG, PWB. 

RE:

Note for MMU owners.

The MMU function during the print is active only in cases of filament load and unload, filament change phases and particularly only till/from the moment the filament reaches/exits the extruder gear. During the print the MMU idler is disengaged (not active). So any printing troubles outside of filament load/unload activities are not related to MMU. 

There is only one exception : if you have to long filament path distance between the spool and the extruder and having some potential filament throughput obstacles- (spool holder spinning resistance, filament buffer In/OUT, PTFE friction due to the too sharp bowden bend angles)  it requires from the extruder gear to high force to pull the filament. After this painful path, the extruder gear must still have enough energy to push the filament through the nozzle and the filament must be strong/solid enough. 

Can you imagine the feelings of the filament? 😉 

RE: Filament gets stuck repeatedly during printing

The high flow end is printing faster ( shorter print time) and extruding the filament faster as well. There is shorter time for the filament to melt. Using the same nozzle temperature for high flow can really lead to filament stuck.  Try experimentally to increase the nozzle temperature 

Posted by: @tombin

hi,
I gave up. The filament jammed during every print, every single one! The time I spent on it, the nerves… I removed the high-flow head and installed the old obsidian one. And the filament jam problem ended immediately. The high-flow head is a disaster. They have to fix it.