Servo Motor on Marlin

Curious if its possible to run Servo motors instead of Steppers with Marlin on a 3D printer.
using a Rambo control board or something else similar.

I realize that it may be a pointless idea. but im just curious if you wanted to do it. what you would need to do

These Teknic Clearpath Nema 23 sized servos seem perfect.

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Makerparts.ca
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Marlin does not support servo motors. It wouldn't be that hard to implement, except for the fact that there's no hardware for reading 4 or 5 encoders.

... I'm using UHU servo drivers on my lasercutter - this drivers are controlled like steppers with STEP+DIR only and handles the encoder on their own.

They runs happy with 48 Volts and up to 150mm/s, but can be upped to 150 Volts max. with up to 450mm/s -- but then the machine with roughly 80kg weight has to be clamped to the table. or it will jump off

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

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

Yes since the servo handles the encoder. seems like perhaps marlin wouldnt know any different from a stepper
you can assign the servo a predetermined step amount , using servo firmware

but how would you connect the servo to the actual arduino board.. stepper has a 4 wire connection. not sure if servo is the same.

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Makerparts.ca
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... the stepper-driver too has only two pins STEP+DIR (you can skip ENABLE), so simply wire the two pins together with GND (and maybe +5V for optocouplers) to the corresponding pins on the servo driver.

It's in fact simply exchanging the stepper driver for an appropriate servo driver ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

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

So you can just plug it into the same port on a Rambo? as the stepper does?

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Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
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... you have to find the corect pins from the controller -- I did this for RAMPS or RADDS shields with "pololu-replacement"-sockets, connecting the 3 pins STEP, DIR, GND ... but sometimes too with a 'blank' ArduinoMega-shield only, when there's no need for the other parts on a RAMPS or RADDS.

For my old CNC this are the wires to 3 of the Pololu-sockets and to the min-endstop-pins - so (with common GND) minimum 10 pins needed ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

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

Quote
VDX
... you have to find the corect pins from the controller -- I did this for RAMPS or RADDS shields with "pololu-replacement"-sockets, connecting the 3 pins STEP, DIR, GND ... but sometimes too with a 'blank' ArduinoMega-shield only, when there's no need for the other parts on a RAMPS or RADDS.

For my old CNC this are the wires to 3 of the Pololu-sockets and to the min-endstop-pins - so (with common GND) minimum 10 pins needed ...

hi can you share the wiring schema? looking to the clearpath's manual is not clear enough for me... pleeeeeease

... look here - I've simply made three "plugs", that wired the signals "STP", "DIR", and "GND" from each of the X/Y/Z-sockets to the corresponding inputs of the servo-drivers:

[www.dr-henschke.de]

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Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

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