Ikea Lack Filament Guide - Friction Fits Polymaker Drybox Bowden Tube

I recently purchased several Polymaker dry boxes (PolyDryer Box). These boxes come with a bowden tube that is meant to be pushed in the seals of the boxes to print. After trying a couple of different methods to get this to work with my printer, I eventually created this small filament guide that will allow for a friction fit installation of the bowden tube. 

I removed the original filament guide that I created based on these instructions: https://blog.prusa3d.com/cheap-simple-3d-printer-enclosure_7785/

After several prints, I felt like the dimensions were pretty accurate and then printed it in black PETG to match the rest of my parts that are exposed to the heated chamber. I used silver PLA for my test prints. The PETG bowden tube hole was a bit too tight, so I updated the model to have a 6.2mm hole for my final model. I have included 3 versions. 6mm, 6.1mm, and 6.2mm. I then created a test print so you can print it out to determine what tolerance is needed in your final part. 

Test Print 

• Small end is 6mm
• Middle is 6.1mm
• Big end is 6.2mm

With this filament tube, the bowden tube stretches between the Polymaker drybox and the top of my enclosure. The filament runs naked between the top of the enclosure and the extruder. 

I used the following print settings:

• .20mm Quality - modified
  • Layers and Perimeters:
    • Perimeters - 4
  • Infill:
    • Fill Density - 15%
    • Fill Pattern - 3D Honeycomb
  • Support Material:
    • Generate Support Material - yes
    • Auto Generated Supports - no
    • Style - Organic
• Supports - For support enforcers only

Paint on supports - Highlight overhang by angle: 10 degrees, then click enforce. 

Now slice and print. 

This prints a small amount of support right in the middle of the print in order to ensure that there is a good ledge on the bowden tube port. I reached in with a small pair of needle nose pliers and was easily able to remove the supports. I was able to print it without supports but the print was a little stringy and needed to be cleaned up with my needle nose pliers. 

Like the original filament guide I was using, I put a small amount of superglue between the model and the Lack to hold it in place.