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.
In my experience, the tip appears to be deformed due to excessive heat. While this may reduce stringing, it comes at the cost of overall print quality and model integrity.
Any idea how I go about exporting a single filament and printer settings file? I think it wants to include all of my filament profiles and settings in each of those files, and for the filament profile it allows me to choose but I can’t pick profiles that have been created by myself?
I’ve just been using more or less your settings for 230°C and they have worked well for me, thank you. Printed myself a new insole to try to make my feet and my hiking boots have a better relationship (version 4 of the design, v1-3 were in normal TPU).
As well as your settings, I also set the linear speeds to some random guesses between 20 and 40 mm/s (based on the VarioShore web page), although I guess that the volume rate limit will have controlled most of these anyway. I also wound the retraction down to 0.5mm, again just based on their webpage and my general ignorance of the potential consequences.
The print quality looked good to me and the print has good structural integrity (the layers are very well stuck together). There was a little bit of stringing but it wasn’t too hard to remove with a knife. When I print the other foot, I’ll choose the seam location and put it on the underside.
Hey this is really helpful!. Do you have any filament profiles for 70A? I am relatively new to 3D printing with Bambu printers (this year) and looking to work with Varioshore.
I’m using something like the below. These values are just pulled out of charts I found from other Youtube videos of people testing this filament. I do not actually own a shore hardness tester.
Shore hardness values lower than 65A may have layer adhesion issues or voids.
