NodeMCU step rate

[Miguel Sánchez]

Hi all,

I am new to this group. I was testing how far NodeMCU (ESP8266) processor could go with AccelStepper at 160MHz. It seems it can reach the 37Khz of step frequency, which is amazing.

I have selected 1 microsecond pulse-width time for that, that seems to work nicely with my DRV8825 board. 

I am planning to use if with a CNC shield and a Wemos D1 (Arduino-like board that features a ESP-12E) for controlling a couple of steppers. Of course if using the built-in wifi I would expect any sort of timing artifacts.

And in case that you wonder, yes, AccelStepper library runs unchanged on the ESP (using Arduino IDE). 

It is interesting to note that from 20.000 steps/second on the real step frequency lags behind the programmed value, till it reaches what it seems the 37Khz limit. 

Cheers,

misan

[Mike McCauley]

Thanks for the report 

Cheers

Sent from my iPhone

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[Mikolaj Kostuch]

Why stepper motor doesn't run with my ESP8266  and AccelStepper 

I use commands 

stepper.moveTo(6600);

stepper.run();

With arduino uno, mega and due work fine

any idea ?

[Mike McCauley]

You will need to post your code before anyone can tell you the problem.

Perhaps you should read:

http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/
How_to_ask_a_software_question
http://catb.org/~esr/faqs/smart-questions.html
http://www.chiark.greenend.org.uk/~shgtatham/bugs.html

Cheers.

On Wednesday, 1 March 2017 3:08:50 PM AEST Mikolaj Kostuch wrote:
> Why stepper motor doesn't run with my ESP8266 and AccelStepper
> I use commands
>
> stepper.moveTo(6600);
> stepper.run();
> With arduino uno, mega and due work fine
> any idea ?
>
>
> W dniu poniedziałek, 26 września 2016 19:51:35 UTC+2 użytkownik Miguel
>
> Sánchez napisał:
> > Hi all,
> >
> > I am new to this group. I was testing how far NodeMCU (ESP8266) processor
> > could go with AccelStepper at 160MHz. It seems it can reach the 37Khz of
> > step frequency, which is amazing.
> >
> >

> > <https://lh3.googleusercontent.com/-H5ep2eSrbsw/V-lem1FR9PI/AAAAAAAApto/o2
> > Cq-t5U-zwtKyijzTiCGpNplf1xoCgvACLcB/s1600/NewFile1.png>

> >
> >
> > I have selected 1 microsecond pulse-width time for that, that seems to
> > work nicely with my DRV8825 board.
> >
> >
> > I am planning to use if with a CNC shield and a Wemos D1 (Arduino-like
> > board that features a ESP-12E) for controlling a couple of steppers. Of
> > course if using the built-in wifi I would expect any sort of timing
> > artifacts.
> >
> >
> > And in case that you wonder, yes, AccelStepper library runs unchanged on
> > the ESP (using Arduino IDE).
> >
> >
> > It is interesting to note that from 20.000 steps/second on the real step
> > frequency lags behind the programmed value, till it reaches what it seems
> > the 37Khz limit.
> >
> >
> > Cheers,
> >
> >
> > misan

--
Mike McCauley VK4AMM mi...@airspayce.com
Airspayce Pty Ltd 9 Bulbul Place Currumbin Waters QLD 4223 Australia
http://www.airspayce.com
Phone +61 7 5598-7474