Can someone help tune my retraction? This here is a TPU retraction tower from 0 to 5mm on a (direct drive), at 12mm/s retraction and 30mm/s deretraction. You can see where the stringing is basically nonexistent at around the 1.5mm area as I tuned it before, but it also coincides with a large void, where 2-3mm of the wall just isn’t extruded during the deretraction phase. So for whatever reason, it takes too long after a travel move for filament to come out of the nozzle.

Is my retraction speed too low or high? What about deretraction speed? Should I be trying to tune down the stringing above or below this void-filled zone, or should I be aiming to reduce the voids at the 1.5mm retraction area? Or just find a compromise?

I’m trying another tower at much lower retraction values (0-1mm) and higher speeds (30 and 60mm/s respectively), we’ll see how that goes I guess, but it feels like I’m shooting in the dark.