simple spool holder

简单稳定，随着打印的消耗，不会因为料盘过轻而从支架上翻下来。也不会被小猫小狗碰撞倒下。pla 30%填充强度没有问题。建议用petg打印。如果摩擦阻力太大，可往横杆上抹润滑油。 Simple and stable, with the consumption of printing, it will not flip off the bracket due to the material tray being too light. It won't be knocked down by kittens or puppies.There is no problem with the 30% filling strength of pla. Suggest printing with petg.If the frictional resistance is too high, lubricating oil can be applied to the crossbar.