MMU Spool Box Setup

prusaprinters

I tried using the spool stands that Prusa supply with their MMU's … not a great experience.  So I grabbed a cheap large plastic tub and lid from a hardware store that would hold 5 spools side by side.  I then cut 12mm plywood that fitted the sides and then measured height and screwed in the PVC pipe holders.   I cut some PVC pipe to length and drilled holes in it for the paracord in the ends to lift it all out of the box easily and to stop spools sliding off the end.  I've added some pass through nut and bolt for the PC4-M10 Festo connectors that pinch together on the plastic wall.  Thread sizes same as the Rep Box one. Use a stepped drill bit to drill the holes at regular intervals through the plastic box without cracking the plastic.  Don't apply too much pressure and they drill perfectly.  Stop when the hole is just big enough to screw in the RepBox pass through.  Add the Festo connector for quick disconnectons.  I used PTFE tube with a 3mm ID and 4mm OD.I then printed the spool centers for the Tecor filament I use from InkStation.  Feel free to adjust sizes in the included FreeCad model for your type of spool.  This produces almost no drag on the filament as it goes to the buffer, but just enough to stop it unwinding the spool.  You can also stack these boxes on top of one another to use filament from multiple boxes.  Note: For Openscad file just change the part name to work on that specific part, if you needed to adjust for different sized pipe for instance.  Openscad requires the Polyround library because it is so awesome I use it in all designs.STL's work for Tecor filament sold by InkStation. PVC Pipe used for the STL/AMF's was 22mm.