when cfs loading sometimes it push filament too much, ignoring buffer and 5way hub endswitches,
when this happens the 5way hub motor driver IC goes in to overcurrent mode and indication dimming white led became blinking twice/sec red led
sometimes feeding wheel make hole in the filament, sometimes - not,
this hole in filament can leave traces and artefacts in print, or even glog in extruder or 5way hub
it’s looks like firmware sometimes (randomly) didn’t recognize endswitches and continue load, even extruders filament indication led is on
looks like no hardware malfunction, it’s all about software
tryed on five different cfs, the same - looks like sometimes(randomly) 5way hub bldc motor feed too hard/much ignoring endswitch and stop feed by overcurrent error(red led blinks twise/sec)
cfs use ms8828 3phase driver IC + bldc hall motor + mt6826 encoder under 32f303arm and i think someting goes wrong with firmware because it is all new stuff
max current of 8828 depends of Rsense, in stock it has 2x0.5r in parallel - 0.25r - about 2.5a, by removing one of Rsense max current drops to 1.3a, so it has not enough power to eat filament, it just catch error, but continue print
strange solution, but it works, anyway waiting for answer from creality, i’m sure thay will solve this bug
