In the video, there will be a freeze when the guide starts to move backwards. It is because there are two teeth that are not enough to cut. I solved this problem with a knife. I modified the stl file as well, it should be better than what I trimmed by hand, but I didn't print it (I just didn't want to waste time and materials doing what I already did).

Model differences:

Filament_Guide_Sled_Cut Teeth:

Modified from the original model, one tooth has been removed, suitable for narrower spool.

filament_guide_sled_Modify Teeth Length:

Modified from the original model, the length of the first tooth when turning around is trimmed to reduce lag and noise. (Not all prints may have this problem. It may be related to the filament used. There is no more in-depth research, just a simple solution.)

Filament_Guide_Sled_Cut Teeth_Modify Teeth Length:

It combines the features of the above two models and is suitable for narrow spool and stuck situations.

Each model here is corrected for various problems that I encountered during actual use, rather than an upgrade.

Tagi

spool rewinder