Recently purchased the Shapeoko 2 and finally got it put together. While testing a 3d model, the Z-axis began losing its position and would gradually cut deeper into the material without being commanded. The g-code sender program says the machine is still at its original position though it is definitely not. By the time the code finishes, my project is ruined and my wasteboard is cut clear through. It's like the Z-axis is losing its zero position.
Anyone else had this problem? What is the fix?