Marlin Firmware and Closed Loop Stepper Motor

This is my first time on this forums and this might be a dumb question, but does Marlin Firmware supports Closed Loop Stepper Motor control?

... if your CL-driver is controlled by STEP+DIR, then it's no difference to normal steppers -- have a CNC-mill with CL-servos, controlled by a "normal" stepper-controller without any further modifications ... the controller are UHU-drivers, reads the encoders from the brushed DC motors, and control them corresponding to the received "step-pulses".

Got recently some mechaduinos, what's too a CL-driver fors steppers, with a magnet on the axis ... and can be controlled either by software, or by "STEP+DIR" ...

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Well, I don't have closed loop driver .. I was thinking in using an optical encoder .. And then make some modifications in the firmware if it is not supported

Edited 1 time(s). Last edit at 06/19/2019 03:12PM by delfindelfin.

... look a bit closer into "closed-loop drivers" - it's mostly a microcontroller, reading the optical encoder and moving/holding the motor (stepper by stepping or DC-motor by voltage controlling) to or at a defined position.

The "STEP+DIR"-types of CL-drivers (as the Mechaduino) behaves identically to a common stepper-driver (as Pololu) -- you only have to wire the optical encoder to the CL-board ...

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So, do I need both? The closed loop driver and the optical encoder? I have just bought one optical encoder like this:

I don't know anything about closed-loop drivers, tough .. But I have heard about mechaduino

Edited 2 time(s). Last edit at 06/19/2019 04:46PM by delfindelfin.

... an optical encoder generates pulses when rotating - in my CNC-mill with STEP+DIR-servocontrollers are optical encoders with 500 lines/rev, so 2000 pulses per full turn on 5mm-spindles, what's enough for a "step-resolution" of 0.0025mm and speeds of up to 150mm/s.

The mechaduinos have a "magnetic sensor" and a magnet fixed to the motor shaft to get the angular position ...

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Viktor
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Call for the project "garbage-free seas" - [reprap.org]

Can I use mechaduinos with any stepper motor? I am using Nema 17

hello !, this is my first post in this forum, I wanted to ask about if you managed to implement the encoders and if marlin allowed you to modify the firmware easily, my final project will deal with this, thank you very much for your answers.

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marcos.santiago.de
hello !, this is my first post in this forum, I wanted to ask about if you managed to implement the encoders and if marlin allowed you to modify the firmware easily, my final project will deal with this, thank you very much for your answers.

I've been using the closed loop steppers from Misfittech for a few years already, with Marlin on a Mega2560 with RAMPS1.4. They don't require to modify the firmware. They work with any board having STEP and DIR pins. It's a great way to get rid of layer shifting problems !

Edited 1 time(s). Last edit at 05/18/2020 06:08PM by kr_.