MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
What an absolute simple yet effective design, has been in daily use for the last 7 months!
The idler arm has eventually broken BUT I was not even using it with a spring, just a careful amount of tightness on the adjuster screw, was printed at 30% infil at 0.2mm layer.
Highly recommend printing this part in solid PLA which only add a few minutes and will probably last the lifetime of the printer :)
Will be fitted with a tension spring this time when I rebuild it, FYI, use a 4mm drill to clear out the filament exit (top) port then insert a small section of PTFE tube to run against the Bearing/Mk8 wheel which will be held in place by the tube connector, this allows for perfect use of Flexible Filament! without any chance of wrapping around the Mk8.