Pinout

[revenador]

Seeing as this seems to be the only repository of knowledge about this board I thought I'd provide the pinout I've probed from my board. Labelled as Developower V2.0. Has a transistor output rather than a relay for the spindle output.

Stepper Drivers
Enable all drivers D8

X axis
Step D2
Dir D5

Y axis
Step D3
Dir D6

Z axis
Step D4
Dir D7

Spindle/Laser D11

Limits
Each direction shares a pin for + and -
X+/X- D9
Y+/Y- D10
Z+/Z- D12

Probe is on A5 on my board. Can't remember if that was stock or if I changed it

[revenador]

It appears this is completely stock for grbl so only useful in that it confirms the board is a stock configuration.

[leoheck]

Oh, haven't seen this issue before. @revenador this is my work trying to reverse engineer as much as possible this board. Have you found any issues or you were just sharing your measurements? My works is may not be complete, and my also have issues, so feel free to give your inputs. Thanks.

[revenador]

Just sharing my measurements. Hopefully it will save someone else some time in future. Looks like you've got a lot further along now than it was when I last commented.

[leoheck]

I see. Cool, thank you.