Hi Bas,

  I was able to find some sample code in the museum piece by Matthew Venn.  
The encoders used on the MaslowCNC are built into the motors but
all the parts are there to get started with.  That is if the Maslow 
developers are interested. I think one of them is but it's a big step up 
from the current
Arduino and custom Ground Control software(python).  They already have 
built a custom driver shield for the Arduino so they would probably look
to make a new custom board for whatever is next.

But the information provided here will allow them to better evaluate the 
task of porting to Machinekit.  Thanks everyone!

Doug

On Sunday, August 11, 2019 at 11:50:41 PM UTC-7, Bas de Bruijn wrote:
>
> Hi Doug,
>
>  
>
> As others have said, there seems to be a similar configuration. But if 
> it’s not perfect then it’s relatively simple to create your own kinematics 
> for your setup.
>
> You also mention encoders, since you seem to want to use a beaglebone, you 
> can have a look into the eQEP encoders. There are 3 of them, you seem to 
> need 2. http://www.machinekit.io/docs/drivers/hal_arm335xQEP/
>
> Not sure what this means for your hardware connection, going from whatever 
> voltage the encoders use to the BeagleBone voltage.
>
>  
>
> You can also look into the driver you’re going to use. If it’s a driver 
> which accepts your encoders and can drive your motors, then you could 
> provide the driver with pulse/dir signals. This is not a closed loop back 
> towards the beaglebone, although with the correct settings you won’t loose 
> pulses.
>
>  
>
> Or if you can do some electronics (power to the motors), you could think 
> about driving the motors with 2 PWM outputs and reading the encoders 
> directly back. Nice closed loop setup.
>
>  
>
> Bas
>

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