Doe's Arduino require setting of pin modes to work with grbl and g code sender? If so where? I have enclosed a couple of photographs to show what I'm working with. I can run the stepper just fine using the Arduino code, but I can not get any communication to the motor using universal G code sender.
What sketch are you running on the Arduino? Pin modes on Arduino specify if a specific I/O is either an input or an output. So yes, pin modes are necessary to let the Arduino drive the stepper motor but usually this is already handle by the corresponding software, that interprets the G code.
I can run Arduino sketches just fine that's not my problem, when I use universal G code sender to send the code to grbl I can watch it run on the XYZ monitor in universal G code sender and grbl is detected by universal G code sender, however I am getting no response from the stepper motor. I can make the stepper motor work just fine using only the Arduino and Arduino code and the stepper controller.
If you are using GRBL on your Arduino all the necessary pinmodes should be taken care of by the GRBL program.
If you plan to write your own Arduino program rather than use GRBL then you need to tell us.
...R