vinyl rings

If you are into vinyl cutting you end up with lots of different rolls of vinyl that are hard to tell apart. I have begun using these rings - I have created HTV for heat transfer vinyl, ADH for adhesive vinyl and OTH for other things like transfer tape. I have included the openscad file which allows you to easily change the size - change the radius in mm - and the label - change the label text. I have printed about 15 of these using a mix of abs+, pla matte and silk pla. All have worked well apart from silk - still trying to lock in the correct parameters.