General Another whistle variation. Decided to go back to figuring out how to make the V2 faster and use less filament rather than alter the design significantly. This lead to a whistle that uses less filament than the V3, and is as fast (Bambu, Snapmaker) or faster (Voron, RatRig, etc) to print as the V3.

Big thanks to CadeRoux_3207747 for the feedback on all the whistles, and the suggestion to trim down the V2, which lead to this model. What Changed

• Shortened the whistle
• Relocated the keyring hole
• Reduced the wall width everywhere and optimized the model to print as 2 walls consistently (0.4mm-0.5mm wall width)
• Trimmed out any unnecessary sections that were either not part of the whistle chambers, or not structural

The original V2 may be more to your liking - it is a little larger and more ergonomic. Or maybe the V3. See what works best for you and your printer. Printing

How many can fit on a bed?

• 300mm bed: 200
• 256mm bed (Bambu X1): 150
• 270mm bed (Snapmaker U1): 180

My observed printing times

• Voron 2.4 1-count plate: 3:11 minutes Filament: 2.20g 100-count plate: 5h 9m
• Snapmaker U1 1-count plate: 5:55 minutes Filament: 2.35g 100-count plate: 7h 3m
• Bambu X1-C 1-count plate: 5:44 minutes Filament: 2.05g 100-count plate: 6h 11m

Other Tips You need to have pressure advance and flow tuned in.

If printing in a material that shrinks (ABS, ASA, etc) you need to make sure your “Shrinkage (XY)” setting under your filament is set correctly. This messed me up when trying out a new filament brand and not noticing it as set to 100%. I've found 99.6%-99.8% to be good for multiple different ASA/ABS brands.

Print Settings

• Layer height: 0.24mm - 0.4mm
• Wall Width: 0.4mm - 0.5mm
• walls: 2 - If you set it to anything more, it should still just use 2 due to the 1mm wall thickness. 
• Inflll: 0% - 30%
• Bridges: Make sure the bridge orientation looks correct, you may need to adjust “external bridge infill direction” in OrcaSlicer

Happy printing and stay safe!