Low profile spool arm - Prusa Bayonet Compatible

Last autumn, I designed the smooth spooler - a felt clutch dampened roller arm. At the time, I adapted a two part low profile spool holder arm that prints a left part and a right part.

So here it is February and I didn't like the way the two spool holder halves filled the space in my enclosure - there had to be a better one-piece spool holder arm that would fit a low profile environment such as my enclosure. The original PRUSA spool holder arm was tall enough that the spools rub on the top of the enclosure.

I have incorporated the bayonet so that the arms you have will fit on this arm holder - no changes needed. You can go low profile and not have to print anything other than the central post.

I have also upgraded the center post of my Smooth Spooler design - call it a V2 spool roller axel - that is compatible with Prusa spool holder bayonet fitting.

Print instructions

This arm should be printed at either .2 or .3 layer height. Both will have a good fit for prusa bayonet. The .2 takes longer, but fits the little filament guide arms better. If you print at .3, you will need to file the little sticks that glue together to make the filament guides shown.

For fill, the low profile arm does well with 30% Honeycomb.  There is an internal torsion chamber that you will see as the arm prints - purpose is stiffen and anti-twist.

2/20 - Added the STL file for the low profile arm because I use prusa slicer v2.3, and users still on V2.2 cannot open the .3mf file.

For print, do add support on bed only. It doesn't print much support, but the part is hard to flat-on-the-bed without it.

I have also uploaded the new arms for those of you who have built a smooth roller (referenced in the remix) ... print those at .2mm height or you'll need to do some filing to get the bayonet to fit. Keep your existing rollers - they will fit the new arms.