[Grbl_Esp32 Issue#287] Pcb for 4axis (not spi) with external drivers

#1 – shreeramlive 于 2019-11-12

You can use this 2019-09-24T165618 820Z-v1p2p1_pcba

This board was designed for MPCNC (only 3 axis). So you can configure an extra Step pin for the 4th axis DIR signal, This board already has Step signal pin for 5 steppers. You can modify the pin map to support the 4th Axis.

#2 – bdring 于 2019-11-12

You cannot use the MPCNC for 4 axis. The (2) X axes and the (2) Y axes share a direction pin. They cannot move in independent directions.

The cpu map you are talking about is for this controller. I do not have any available for sale, but you could build your own from the source files.

#3 – karoria 于 2019-11-12

Hi Barton.. I am also interested in 4th Axis (A Axis). Can you share an example cpu map file? BTW, I am not using memory card pins if they can be used.. I am sure such example will be useful to other fellows also. I have noticed that all the examples with more than 3 axis are for hobby servo and not for stepper.

#4 – shreeramlive 于 2019-11-12

> You cannot use the MPCNC for 4 axis. The (2) X axes and the (2) Y axes share a direction pin. They cannot move in independent directions.
>
> The cpu map you are talking about is for this controller. I do not have any available for sale, but you could build your own from the source files.

@bdring Thanks for correction. I referred MPCNC board since @aldanstar mentioned to use external stepper drivers.

#5 – bdring 于 2019-11-12

I also have this design. I do not sell it, but the 20191112_103907