Theo  wrote:
> Gerhard Reithofer  wrote:
>> as this is Raspberry newsgroup I would also be interested which
>> controller you use for these steppers.
>>
>> There are simple and cheap controllers for servos (e.g. a 16-channel
>> conroller for ca. $10) and I think it is far more expensive to use
>> steppers for several axes, like a robot arm (6 axis).
>>
>> And how do you program the stepper controllers?
>
> The stepper motor controllers like this one:
>
https://www.ebay.co.uk/itm/4-Channel-HG7881-DC-2-5-12V-Stepper-Motor-Driver-Con
troller-Board-for-Arduino/292584679609
> typically use a few GPIOs for STEP, DIRECTION and so on.
>
> The CNC folks typically have multi axis stepper controllers with support for
> limit switches, spindle control etc:
>
https://www.ebay.co.uk/itm/3D-Printer-Kit-for-Arduino-CNC-Shield-V4-Nano-3-0-A4
988-Driver-GRBL-Compatible/152897481604
>
> There's a variety of firmware for running such controllers on Arduino and
> similar, doing closed loop control.

###>>>>> "as this is Raspberry newsgroup" <<<<<###

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