I managed to flash Grbl 1.1 into the Arduino Uno, Install and move all three axis, they work perfect, g code sender can run the nc files im uploading. Im just stuck with the spindle.... Here is what i ...

i have a problem in y and z axis. ı am using arduino uno+cnc shild with GRBL compiled. .If send command to move only the y axis in both(+/-) directions, z axis goes + direction too at the same time ...