Bộ dẫn sợi (Filament Guide) dạng đứng độc lập

Some of my printers are top-feeders (An Flsun T1 Pro, and an Flsun SR). One doesn't have a heated chamber and another isn't enclosed. For those printers I have creality filament dryers sitting on the top. The problem is that the angle the filament comes out at creates a lot of drag to pull into the printer. I added PTFE tubes which helped, but not enough. Due to the design of the printers, the box has to sit very close to the feed hole, which creates that drag-inducing sharp angle.

As a result, I created this free-standing filament guide. It has a telescoping inner shaft which allows the height to be adjusted as needed. I designed this to be used with or without a PTFE tube, so I ran to the local DIY store and picked up some sliding door screen rollers: they were cheap, perfectly-shaped with a channel around the rim of the wheel, roll very easily, and easily installed.

I probably over-engineered this, because I printed with 4 walls just to give it strength. I printed it in PLA, though it may need PETG -- I'll find out through use. I had PLA on the printer, so I went with it.

On the telescoping shaft, the pin can be used in either direction: using the smooth end makes changes super-easy, but using the ball end locks it in place. If the ball end is a little difficult to put in, a quick shot of lubricant will do the trick.
Assembly is pretty self-evident: 

1. Glue the wheel brackets into the top plate.

2. Glue the top plate to the top of the inner shaft (the top end is the end closest to the holes)

3. Mount any wheel to the brackets

4. Put the inner shaft into the base and set the height with the pin.