I have a new project, a simple / small CNC platform, based on the following:
1.1- three NEMA17 stepper motors.
1.2- three A4988 Stepper drivers.
1.3- an Arduino UNO board Rev.3.
1.4- a CNC arduino shield V3
1.5- A 24V 10Amp Power supply.
2.1- GRBL 0.9j.
2.2- Universal G-Code Sender V2.
When I assemble the shield, Arduino, Drivers, Steppers & power supply, All seams good, nothing smoking...
The G-Code sender performs a perfect response, all parts are OK. BUT... oh BUT...
Axes X stepper is working perfect (as expected), Axes Z stepper is working perfect, and Axes Y Doesn't response at all...
I changed the Arduino... same default.
I changed the Shield... same default.
All steppers are working perfectly when installed at the X or Z ports...
All drivers are working perfectly when installed at the X or Z ports...
The PIN mapping is correct (physically at the shield, and by the GRBL mapping)...
My collage project is at held for that, and I am stuck... badly
Using the Multimeter,
Port X produces 1Amp when in RUN
Port Z produces 1Amp when in RUN
Port Y produces NO Amp when in RUN, but reads -0.81Amp if either X or Z in RUN