Prusa i3 Add-On X Tensioner

thingiverse

Improved supports and increased hole slop are added to a standard design. A lot of X idlers come with a tensioner mod for the Prusa i3, but why print an entire new idler when you really need is just a tensioner that fits your existing one? This simple and concise add-on x-axis belt tensioner can be used with most existing Prusa i3 x idlers and requires very little material. If you have an unusual x-idler or another printer with a similar design, you can modify the included SCAD file to fit it perfectly. A YouTube video at http://youtu.be/P8eE1t2wybg shows how easy this add-on is to use. Here are the instructions and parts needed: Instructions Bill of Materials 1x M3 x 20 bolt 1x M3 nut 1x M3 washer 1x M4 x 14 bolt 1x M4 nut 1x 624 ball bearing A lot of X idlers come with a tensioner mod for the Prusa i3, but why print an entire new idler when you really need is just a tensioner that fits your existing one? This simple and concise add-on x-axis belt tensioner can be used with most existing Prusa i3 x idlers and requires very little material. If you have an unusual x-idler or another printer with a similar design, you can modify the included SCAD file to fit it perfectly. Assembly To build this part, slice and print one of the included STL files and add the vitamins listed in the Bill of Materials (BoM). One of the STLs prints the tensioner part on its side with built-in supports. This makes a stronger and neater looking part after some extra cleanup. Then just stick the endcap part over the hole in the x-idler and screw it into the trapped nut in the tensioner. It really is as simple as that! Note that the x-idler.stl file is only included for the "assembly" view in the SCAD file.