ipcalit

Just some heads-up on the work posted on reprap forums. We are making great progress on a less than 30g extruder. Best design so far has 15g and 2kg pull force, perfect for 0.4mm nozzles. Commercial 3d doodlers use similar setups so we are definitely on the right track. http://forums.reprap.org/read.php?1,661444 A pair of these can easily drive a dual-head Um2 without Bowden drawbacks. Sounds great! Curious to hear more about this :)Should it need its own topic? Not sure it needs its own topic as there's one on reprap and it would fragment the ideas and community. Just head there and voice your opinions.

Just some heads-up on the work posted on reprap forums. We are making great progress on a less than 30g extruder. Best design so far has 15g and 2kg pull force, perfect for 0.4mm nozzles. Commercial 3d doodlers use similar setups so we are definitely on the right track. http://forums.reprap.org/read.php?1,661444 A pair of these can easily drive a dual-head Um2 without Bowden drawbacks.

Here is another attempt for a 30g ultralight extruder using a geared DC micro-motor instead of stepper. Pulling 2.7kg from the first try is great news for such a tiny setup. http://forums.reprap.org/read.php?1,661444

Did anybody try the tiny geared DC micro-motors from Pololu? https://www.pololu.com/category/141/micro-metal-gearmotors-with-extended-motor-shafts Some of them come with built-in encoders and between 30 - 120rpm should provide enough torque to drive 1.75mm filament. Other commercial product seem to use similar micro-motors for compact extruders: http://nscrypt.com/docs/nScrypt-nFD-Brochure.pdf At ~10g motor + 5g for bearings + 5g whatever spring/hardware you add, the package would be adequate for deltas directly on the effector.