Hi,

unfortunately the pluto-p board is the poor relation of interface boards in 
lcnc.
But anyway I have fixed some bugs in the pluto-servo driver.
Due to lack of stepping equipment I have not yet done for pluto-step.
I've also made a pluto-servo-spi driver for raspi.
If I could spent more time for hacking I could try to make a pluto-step-encoder 
version for you.

Cheers.


<http://dict.tu-chemnitz.de/english-german/relation.html>
On 2013-08-18 22:07, tuxcnc wrote:
> Hi.
>
> There are available cheap stepper motors with encoders, for example
> 86HS80-EC-1000.
> And there are also a cheap cards Pluto-P.
> Pluto-P has two modes, first PWM and encoders and second  stepgen ie
> STEP/DIR
> There are two firmwares, one for servos, one for the stepper motors.
> It is not possible to use encoders simultaneously with the stepper motors.
> There are stepper drivers with a closed loop, but they are expensive and
> only work on one axis.
> It would be better to move the loop to LinuxCNC, then, when one axis
> stops or slows down , the others axis can operated synchronously, slows
> and waits for the slow axis will move.
>
> And now the question:
>
> For the Pluto-P are available sources of firmware and modules for LinuxCNC.
> In directory src/hal/drivers.
> Could someone find the relevant parts and write firmware and module for
> the Pluto-P, supporting both encoders and stepgen?
> In my opinion, in stepgen and PWM are the same number of pins, so may
> be, it just should be replaced code of PWM by the code of stepgen, in
> servo program.
> But I don't know this device and its programing language.
>
> Regards.
>
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