Kompaktkossel Evolved

thingiverse

This is an update to my Kompaktkossel build. A few things were off with the original version: With the carriages, the belt positioning was a bit off so there were binding issues. The new carriages fix this. Note that the horn distance is 40mm, but I'm using a washer and an extra M3 nut to extend it a little, so the diagonal arms have enough free space and don't collide with the carriage. Also, the "Squirrel" effector could collide with the diagonal rods at certain bed positions. The new "Turbosnail" effector does not reach over the edges of the triangular borders. Then, the diagonal rods were too short to reach every point on the plate. The new beams are 185mm hole-center to hole-center. With the new rods, it has to be a little taller, with these measurements, it will work with both 450mm or 500mm tower beams. It also got a heated bed, the purple 170mm hexagonal bed you can acquire at various Chinese sources. New heat bed holders were designed for this. A stronger PSU was in order for the heated bed to work. Luckily, the "100W" heated bed had a resistance of 4 Ohms, which only makes it a ~40W bed at 12V which doesn't blow the PSU. Finally, it now works with a Duet Maestro board. It barely fits, but it fits. I had to use a short ethernet extension with a socket on one end to put the RJ45 socket between the beams. New BOM, this might be incomplete: *Hardware* 3x Alu Extrusion 2020 450mm 9x Alu Extrusion 2020 200mm 1x Kossel Corner set for 2020 extrusions 3x MGN12H Linear Rails + Carriages, 300mm 3x Cherry End Stop Switches 3x E3D 0.9 deg Slim Line Steppers 3x GT2 pulleys, 16 tooth 150x3mm round glass plate 3m 6mm GT2 belt 170mm 100W heated bed MeanWell 12V 12.5A PSU Power switch with fuse Duet Maestro Board lots of M3, M4 screws, M4 in-slot nuts *Hotend and Extruder* E3D V6 (Lite) or a clone Tevo Titan Extruder PTFE Tube 1x 4015 radial fan *Diagonal Rods* Traxxas 5347 rod ends (pack of 12) 12x 150mm 6mm OD, 4mm ID carbon fiber tube 12x 20mm M4 threaded rod epoxy glue Hole center to hole center distance AKA DELTA_DIAGONAL_ROD should be 185mm. I printed a helper rod with two long M3 screws at that distance with my other printer. *Electronics* Duet Maestro *Printed Parts* 3x schlitten_v3 1x druckkopf_v5 1x druckkopf_v5_bracket 1x druckkopf_v5_nozzle 3x endstopholder 3x heat bed holder 1x psu_holder_top 1x psu_holder I used a stick-on-nozzle pressure sensor for auto calibration, but will upgrade to an IR Z-probe mounted to the hot end cooler soon.