Hey all. I spent the better part of 2 days tuning Varioshore (foaming variable shore hardness TPU) on the H2D and wanted to share both my results and the settings I used to create the prints.
Varioshore 92A H2D 0.4mm Std
Copied profile from ‘Bambu Lab TPU’
Flow ratio - 1.14
Nozzle temp - 190c (foaming starts around 200c)
Max volumetric speed - 2.8 mm3/s
Bed temps 65c first layer/55c
Cooling Min 40% 30s layer time
Cooling Max 90% 12s layer time
Aux fan 100%
Cooling overhang threshold 10%
Fan prestart time 2s
Retraction
Length - 4mm (I think less was also okay…)
Retraction speed 50mm/s
De-retraction speed 20mm/s
Travel distance threshold - 1mm
Wipe while retracting - Checked
Wipe distance - 2mm
Varioshore 65A H2D 0.4mm Std
Note: I still haven’t completed dialing in the flow ratio on this one. Also the 65A is just an estimate based on Youtube videos/posts I’ve seen.
Changes from Varioshore 92A profile
Min fan speed - 20%
Max fan speed - 60%
Flow ratio - 0.51
Nozzle temp - 230c
Retract when changing layer - checked
Retraction length - 2.4mm
The benchy boat was printed before I tuned my retraction settings so its using the 92A retraction settings. I am also using slower acceleration and speeds but I haven’t played but these are mostly limited by volumetric limits anyways.
Hope it helps!