Heyho :)
Here is a tensioning device for the belt of the Y-axe.
I have tested at least 4 different designs myself but was never really satisfied. Either the designs were too clunky, not nice to print, you had to drill holes or the movement radius was too small.
So here are the advantages of my version:
You will need parts:
standard & slim design can be printed for a 3 mm or a 5 mm idler axis.
Belt tensioner standard
With the standard version, all parts are included in the kit and you do not have to organise anything separately.
2 x M3 x 10 mm Screw
1 x M3 x 25 mm Screw (20 - 30 mm should be fine too)
1 x M3 x 30 mm Screw
3 x M3 nut
1 x M3 nylon lock nut
1 x M3 washer (optional)
1 x Axis 20 mm x 3 mm
1 x Belt Idler
Belt tensioner slim
Replace the M3 x 30 mm screw with a 25 mm screw.
Replace the 20 mm axis with a 17 mm one.
Assembly sinstructions:
Tipps:
You can change the assembly order if you want to. But then it may get a little bit more fiddly.
You don't need to take the display off.
It is more easy to adjust the belt tension if your printers position is close to the table edge
You can use the Prusa belt tension app as a help to adjust the tension. https://belt.connect.prusa3d.com
Printing Instructions:
I used a 0,4 mm Nozzle & ASA 4 Perimeter, 25% Infill
Other materials like PETG will work fine too. PLA is not recommended.
Tolerances: I designed it so everything was a quite loose fit. So even with not perfect adjustments most of you should be able to reprint this without problems :D
Small Update 17.01.2024: Added a Pinhole for a better disassembling of the pin. Thanks to craigktreasure for the input :)
Der Autor hat dieses Modell remixed.
Tension adjusment is accessable from the front.
No holes need to be drilled into the frame.
Different idlers can be used.
Wider range of motion.
Slim and simple, clean look.