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People building or using RepRaps.
Re: small printer, runs off of 5v, fits in a backpack. - 10 years ago
Someone finally made a cute delta printer using these 28byj-48 tin-can motors at $1 apiece.;-)by vn - General
Re: Stepper motor alternative ? - 10 years ago
Just saw some one did it nicely on a Prusai3by vn - Developers
Re: RepRap using DC Motors! - 11 years ago
QuoteVDX ... the controller generates only the STEP+DIR-pulses with adjustable settings for max speeds and acceleration ... the drivers 'reads' the encoder and performs the closed loop on their own ... There are some Japanese made controller chip which can generate the pulse up to Mhz. Do you have the info of those drivers?by vn - Reprappers
Re: RepRap using DC Motors! - 11 years ago
QuoteVDX ... the motors are direct connected to spindles with 5mm travel and 2000 'encoder-steps' per turn, the drivers can handle up to 300 kHz, but the controller (a generic STM32) with the actual (proprietary) firmware can only handle 100kHz max ... Does the controller perform the closed loop control for the motor? Or it just generates the step+dir for all drivers?by vn - Reprappers
Re: RepRap using DC Motors! - 11 years ago
QuoteVDX ... I have the guts from several inkjet-printers lying around somewhere (salvaged them for this sort of tinkering) - but got/found then all sorts of high quality gear around steppers, servos, encoders and such ... Snd so I've refurbished a CNC-mill with servos+encoders for laser-engraving -- it's much more accurate and fast now, compared to stepper motors ... but compared in costs, thiby vn - Reprappers
Re: RepRap using DC Motors! - 11 years ago
There are several similar threads on RepRap forum. People tried this many times before. However, I haven't seen any real success even though recently there have been several crowdfunding 3D printer projects deploying DC motors -- e.g Rappy, Micro, MOD-t and upcoming ServoStock. The truth is that, with existing technology, it is not possible for dc motor driven 3D printer to have the same performaby vn - Reprappers
Re: Stepper motor alternative ? - 11 years ago
Is it true that the recent Kickstarter project The Micro 3D Printer uses DC motors instead of steppers?by vn - Developers