Chimera Jamming every print

I'm using a chimera clone with the heat break cooling fan wired into the power input of my MKS base, PLA temperature ranges and have tried retraction between 1mm and 7mm, all of which jamming in at least 1 extruder often towards the beginning of each print. Any ideas what is occurring or how to fix it? 


  • Jamming is more a question to extruder vendor as they all have their own special problems. Normally it is a wrong assembly leaving a hollow place ot defect heat break that causes heat/filament to go to places they do not belong to. Also some have a limit on retraction that causes no jams.
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