3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
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Just to add on to this, I understand the technical benefits to steppers, but surely a stepper motor could be given some servo-like functionality by simply adding encoders to the stepper shafts. You can get rotational hall sensors with diametric magnets for a couple bucks each. Even if you weren't using the encoders to operate the motors directly, you could use them for fault detection. An encoder with 10 bit accuracy could just about match the substeps of stepper motors for resolution.
Now, most of the time when a stepper gets out of, well, step, it's because something's gone wrong and you wouldn't necessarily want the printer to correct it directly, but simply being able to pause on a fault and record the fault' time and direction would make a big difference to troubleshooting.
Doesn't the "missed step detection" on the Prusa printers already achieve a lot of that? I think it monitors the current to the motor and flags any abnormal behavior, without needing extra hardware on the motor.
That's not to knock the value of positional feedback, which is clearly superior, but just to say that I don't think this idea has been entirely neglected.