umo mod: IRobertI's feeder on UMO v4.0

youmagine

Human: inspired by: https://www.youmagine.com/designs/um2-feeder-on-um1 for use with: https://www.youmagine.com/designs/alternative-um2-feeder-version-two---UPDATE (v4.0): this version is even more silent than version 2.0, requiring only 4 fan dampeners like those found at: http://www.amazon.com/GELID-Solutions-Silicone-Vibration-Dampening/dp/B003Q5GI2U ---UPDATE (v2.0): the design has been updated and a new model with dampers uploaded; three dampers 15x15mm - M4 and three screws PH2 M4x10mm are needed, it works pretty well so far i also added a picture comparing noise before and after damper installation, it's not much but it is and it's way more silent than the original feeder i recommend 1.2mm walls and infill around 25%, no support is necessary since it is integrated into the model files (only true for damped version) ---since the original version didn't fit for me, i redesigned the um2 feeder adapter for the um original this one fits perfectly at mine - it's also super rigid as shown in the following video (printed with 0.8 shell, 30% infill, "support everywhere"!!!): i can reach up to ~12mm³/s without any underextrusion (see picture above) update: since i now calibrated my feeder i reach now up to 18mm³/s , didn't tried more so far... the e-steps per mm for an mk8 drigear should be around 365 as i read, since i am still waiting for my 400steps/rev. motor i cannot confirm that at the original stepper it is much lower (but the original motor does not work for high quality prints - 1.8° steps are just too unprecise!) update: the stepper arrived and 340 works very fine for me! (see here for more information: http://reprap.org/wiki/Triffid_Hunter%27s_Calibration_Guide/de) update2: i was still extruding way too much! 302 is perfect now, to calibrate for the first time do the following: - pop the bowden tube out the hotend - preheat pla (to activate the extruder motor) - extrude a bit until you can mark the filament at the bowden end - let it extrude 10mm - mark again and measure as accurate as you can - new e-steps = old e-steps * (10/measured mm) i also recommend some rubber washers between motor and the adapter to further minimize noise (it is very quiet compared to the original!) you can also use a selfmade silicone-damper as me: https://www.youmagine.com/designs/nema-17-silicon-damper-stencil as an umo-user you will not have an clamp for the feeder, i suggest that one:http://www.thingiverse.com/thing:46318