Track with additional rewind option for Multiple Mechanism Auto-Rewind Spool Holder

thingiverse

The only feature missing from this stand design is a possibility of additional rewind capability when the track reaches its lowest position. This feature isn't necessary during normal printing, but it's useful during rewinding filament back to the spool before changing it. In cooperation with the author of this stand design, we've prepared a modified track part that provides this functionality. This modified track part features a spring on its bottom end and a longer neck at the top. The spring holds the track in working position with teeth engaged but also allows further movement where toothless area meets the gear and allows free rotation. Watch the video of this track in action at https://youtu.be/Gp9KecYa2sk. You'll need a suitable spring to make it work. I've found one in an old ballpoint pen, measuring 4.6 x 30 mm in dimensions. No other changes are needed for the stand design; just use this modified track part. Another video showcases the spring track in action while rewinding filament back to the spool on July 12th, 2019, at https://youtu.be/vX8K0OM5W3g. On August 3rd, 2019, another version of the spring track was introduced based on Track 1.2.