(Velleman K8200 with e3d hotend)
I sometimes wants to pause a print to change filament, but the following has happened a couple of times now:
When unpausing the extrudermotor goes whacko, and either extrudes or retracts a silly amount of filament. Maybe in the 10cm range or so. So either i get a
LARGE blob on the print which ruins it, or i get NO filament for a couple of layers. Also when retraction happens it seems to loose 1 or 2 layers, which means it
gives a gap in layers.
This happens in 1 out of 5 pauses perhaps. So it is a gamble to pause.