Hollow cylinder for filament holder made with a stand
by danielkschneider, published
This OpenScad module defines a hollow cylinder with parameters (outside, inside, length).
Together with a "chemistry stand" it will make a fine filament roll holder.
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It is always better to have the filament roll on top of the extruder. If you got a high ceiling or if you are moving your printer, then you need a portable solution.
Buy a retort stand, i.e. the kind that is used in chemistry labs. Yours could be made of:
- Two 1.2m vertical bars (with two attached "feet" or else attachable feet). You can take shorter vertical bars (e.g. 0.9m,) but then the horizotal bar may be at your eye-level ---
- One horizontal 1m bar onto which you then can glide the roll.
- Two connectors for fixing the horizontal bar. It is best to buy ones that allow to lift the horizontal bar quickly.
Configure the OpenScad program and print a hollow cylinder so that the roll can turn with less effort. Attached pictures show the principle.
The example included are for a 12mm bar and either a roll with a 31.6 mm hole or one with a 38.4mm hole. Unfortunately the filament roll holes come in many sizes....
This piece can be printed with any 3D printer in any quality. I suggest to use some kind of moderate fill. The printer on the picture is a Felix for which I made the cylinder. It was printed in ABS with a fabbster.
Tips for optimal performance:
- Use a file for smoothening the inside
- Print in high quality (0.25mm layers). A 3.7 x 19.5 cm cylinder can take many hours to print, but it may be worth the effort
- Make sure that the horizontal bar is really horizontal.
Print 2 short extra-cylinders, insert before and after the big one and then use clamps to hold in position (for long "night printings")
- Of course, publishing a hollow cylinder is not worth a "thing" here, but I am really happy with my chemistry stand solution :)
- Update 24/8/2012: Been using this for over a week now. I still like the setup a lot, but I reprinted the cylinder in better quality using PLA and added clamps. The roll now turns even more easily and can't slip off after a many hours of printing.
- Update 26/10/2012: I am doing unsupervised 24h prints with this setup. Convinced :) The only remaining trouble is irregular filament, but that's a different issue ...