Biqu Panda Shelter Tube Jointer Replacement

Biqu Panda Shelter Tube Jointer 

Notes: This is re-upload of my original content on makerworld

A replacement tube jointer for the Panda Shelter enclosure frame, with a snug fit on my existing tubes. Includes a print-ready version oriented at 45° with a sacrificial fin support.

Included versions

• Panda Shelter Jointer: original jointer.

• 45deg Triangular Fin: 45° print orientation with a breakaway fin and modeled brim.

• 45deg Triangular Fin with Object Brim: adds extra modeled adhesion around the jointer's bed-contact area.

STL files are included for each version.

Choose your print orientation

• Straight/upright version: choose the original jointer for a simpler setup without the custom fin. Check bed adhesion and any support needs in your slicer.

• 45° fin-supported version: choose this for an angled print with a built-in sacrificial support. Keep the supplied orientation and relative part positions.

Printing at 45° places the tube axis across the layers rather than perpendicular to them. This can help resist bending-related separation along a single layer compared with an upright print, although strength still depends on load direction and layer bonding. The fin helps stabilize the angled part during printing; it is removed afterward. The angled version requires more cleanup and is not guaranteed to be stronger in every direction.

 Recommended print settings

• Material:PETG

• Layer height: 0.24 mm

• Orientation: choose straight/upright or 45° fin-supported. For the angled version, keep the jointer and support together as positioned; do not auto arrange their individual parts.

•  Support: on the fin-supported versions, the fin is already modeled. Check its connections and remaining overhangs in the slicer's layer preview before printing.

• Bed adhesion: use a raft. I use 2 raft layers with 2 mm expansion. An earlier print lost bed adhesion partway through, so I recommend the raft even with the modeled brim.

 After printing, let the part cool. For the fin-supported versions, carefully cut the small breakaway connections and remove the fin. Remove any brim and raft, then lightly deburr the contact points as needed.

Fit notes
On my printer, 0.20 mm layers gave a slightly loose fit, while 0.24 mm layers produced a snug fit with my tubes.

 Layer height can affect the printed fit, especially in the angled orientation, but results depend on your printer, filament, and tube dimensions. Treat 0.24 mm as a starting point and test one jointer before printing a full set. Do not force the jointer onto the tube.