Qidi X-Max Spool Holder Improvement

prusaprinters

The standard Qidi X-Max spool holder is unfortunately uncomfortable to use and creates a lot of friction when unwinding, for example because the axle diameter is much smaller than the inner diameter of the spool. I have tried to improve all the problems and now it works very well for me.The design is fully printable, easy to assemble and does not require no modifications to the printer itself. No other parts are necessary. I made sure to use as less material as possible and design everything printable without support.First, I designed an adapter that increases the diameter of the axle so that the spool can roll radially. This is the 52.8mm outer diameter version, which works very well with my spools from eSun. I'm sure it will fit with many other brands as well. I have provided a clearance between the axle and the inner diameter of the adapter so that the adapter can rotate on the axle. This minimizes the friction surface and makes it very smooth.Then I was annoyed by the stoppers on the side, which have to be loosened with an hexagon socket wrench. My design is now fully hand operable. I have designed the thread according to ISO standard without additional offset. Please scale the screw in your slicer in the X/Y plane so that your printing accuracy fits the thread. I scaled the screw to 98% in X/Y and 100% in Z and it fits very well. If you don't do this, you will have a hard time getting the screw in.Since the spool always moves slightly to the left and right when unwinding, they stupidly sometimes "jammed" on the old side stoppers. This caused it to unwind with great friction. To prevent this, I have constructed a disc. This also reduces the friction between the spool and the holder by its design, because it minimizes the contact surfaces to the spool. The raised edge on the outer diameter must face to the spool to reduce friction.