I need a fresh approach for my extruder clacking. (V-Core 3.0 400 with Duet Board)
I have a v-core 3.0 400mm with a Duet 3D Board, a Rapido UHF in HF mode (with a NozzleX) and severe issues with extruder clacking. For a while, the extruder clacking was only with Silk PLA which appears to not like Retraction very much (my working theory is that it's widening during the retraction phase, causing a Hotend Clog). However, today I tried to print standard eSun Pla+ after some time (which never made any issues) and I started having extruderclacking there as well... What is interesting is, that the clacking only happens after some time into the print, which may suggest Heatcreep but I don't know why this would get progressively worse and I'm also running the hotend fan at 100%. I also just dismantled the fan and looked at the cooling shroud for dust but it's still very clean.
I seriously need a new pair of eyes to help me get a new perspective here.
5 Replies
heat creep doesn't stop.... it will continue to heat the sink until it matches the hotend as long as heat in the hot end is not dissipated by the heat sink cooling you provide.
yeah but the cooling is constantly at 100%
and the pla+ never had any heatcreep issues before
cooling you are supplying may have the fan at 100%...doesn't guarantee it's enough to stop creep. Chamber temperature rise / system heat soak, also means your cooling air is not as cool as when you started, only exacerbating the issue. 'clacking? Do you mean skipping/slipping of the extruder pushing filament? of watch carefully is it retraction snapping in the opposite direction and a bit of freep lay in the drive gears of the stepper?
it's definitely not grinding. the extruder gear is jumping back as the stepper motor is overpowered by the resistance.
The chamber is open, the bed at 65C
what is interesting is that I can cancel thr print and restart after a very short time (<1min) and have the same behavior again - the first few layers are skipping free and it gets worse after a few layers.
absent-sapphire•2y ago
i have many problems with the rapido too, i have extreme under extrusion with normal temps. for example pla needs to be at 240C to print properly, but comes with its own problems (needs much more cooling), changed from UHF to HF makes it way better but anyway. Tried diffrent sensor types (documentaion on this is very poor) but that didnt did the trick.
i really like how fast the hotend ramps up and how stable it holds the temperature but since i use it i have only trouble, im printing the part for my old dragon in sla (hope it holds for the tests). if my problems are gone then i payed two rapidos for nothing ...