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gin66 / FastAccelStepper

A high speed stepper library for Atmega 168/328p (nano), Atmega32u4, Atmega 2560, ESP32, ESP32S2, ESP32S3, ESP32C3 and Atmel SAM Due
MIT License
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Will the library work with AC Servo Motors? #230

Closed programmeddeath1 closed 4 months ago

programmeddeath1 commented 5 months ago

I wanted to know if the library will work with AC Servo Motors?

I have this servo motor - https://pdf.indiamart.com/impdf/27505187955/9355230/ac-servo-motor.pdf.

It possibly runs with the same Direction/Pulse logic. Will I be able to run it with the same library?

Thanks for your help in Advance!

gin66 commented 5 months ago

FastAccelStepper does not drive any stepper directly. It still relies on a stepper driver, which translates step/dir/enable into the phased voltages to control the actual stepper motor. Glancing over the linked site, I could not find any info, that step/dir is supported by the electronics controlling that motor.

programmeddeath1 commented 5 months ago

RS Series Servo System Start Guide.pdf

Hi you can check this file.

For your reference page number 5 shows the Pul/Step control terminals for the driver.

gin66 commented 5 months ago

the spec is not really clear for step interface. Is it now 24V ? must it be be a differential signal? is the step on positive or negative edge.

programmeddeath1 commented 4 months ago

image

It shows control through differential 5V input. I can just confirm if its step on rising or falling edge, but the rest seems like it could work with the same setup right?

petmakris commented 4 months ago

The Differential input 5V most probably means the inputs are opto-coupled so a floating 5V pulse between PUL+ and PUL+ will activate the input.

You can try and generate some pulses with an arduino or a square wage signal generator into them pins. If this will work, the library will work too.

Your question is not really relevant to this project though

gin66 commented 4 months ago

In case you can connect the PUL- to GND and PUL+ to output of the uC, then it should be ok for an avr. For an esp32, which does not output 5V, still a level shifter is needed.

programmeddeath1 commented 4 months ago

Hi yes thank you for your input guys, I understand its not really a library specific question but a more general hardware compatibility query, it should ideally work, but just wanted to confirm. I am running even the esp32 on Hybrid Drivers with 5V triggers, because usually for some 5V systems the HIGH trigger is at 2.8V and thus the esp32 with 3.3V is also able to provide the pulse triggers properly, else ofcourse I have level shifters for relay's etc which require higher min voltage more than 3.3V.