WinchRack-Box

prusaprinters

This is a filament rewind spool box, with two independent drive rollers to allow filament retraction during filament changes.Full documentation for the build can be found here: https://github.com/robandwend/winchrackboxA video showing the box can be found here: WinchRack-Box V1.1 (WRB)About See the readme.pdf for full detailsMulti filament printers such as ERCF & MMU require some way to store the filament that is retracted during a filament swap. Various 'buffer' implementations exist for this purpose, however they occupy much space, and make loading / unloading filament more difficult.The AMS implementation is much neater, rewinding the filament automatically back onto the spool.This box design allows the spool to be neatly stored, with no need for 'buffers' when used in filament swappers.The rewind mechanism inside the box is based on this original design by 'Mr Goodman' LINK TO ORIGINAL WINCHRACK. Although I did made a number of small changes to this design (see MY CHANGES ) which I would recommend for the WRB.The mechanism now has both rollers motor driven to improve the functioning with light (near empty) filament rolls.The BOM below however is a full component list for the box and mechanism.Total cost of building a WRB excluding plastics should be less than $17US (plus any shipping costs).BOMWago 5pin x 2Opto endstop x 1 (https://www.aliexpress.com/item/1005005304758202.html)n20 gear motor 300 rpm 5v ~ 6v x 1 (https://www.aliexpress.com/item/32910935772.html)Solenoid 5v/3kg x 2 (https://www.aliexpress.com/item/32575060483.html)mosfet switch 1ch x 1 (https://www.aliexpress.com/item/1005006165294338.html)608zz Bearings x 4 (https://www.aliexpress.com/item/1005005321486587.html)623zz Bearings x 8 (https://www.aliexpress.com/item/1005005480256021.html)silicon ring x 1 (https://www.aliexpress.com/item/1005005445878990.html)PTFE tube 3x4 or 2x4 (https://www.aliexpress.com/item/1005001408141263.html)m3 insert nut (OD 5mm, L 4mm)m3 bolts (get a selection pack if you've not already got one)m2 self tapping screw 8~10mm x 46mm collet for 4mm PTFE Tube x 1 (https://www.aliexpress.com/item/4001119588533.html)D2F Micro switch (https://www.aliexpress.com/item/1005004693669754.html)4mm Bearing ball (https://www.aliexpress.com/item/1005003377385833.html) (Or these can be taken from inside a 608zz bearing)12V 3A DC Power Connector (https://www.aliexpress.com/item/1005005610836339.html)Assorted wego style connectors (https://www.aliexpress.com/item/1005007090402568.html)5V power supply (plugged for your country)FULL BUILDING INSTRUCTIONS CAN BE FOUND HERE https://github.com/robandwend/winchrackbox