I am encountering a problem with this ID3 printer using ABS -- at some point during the print the print head displaces on the y-axis by 2-3 centimeters. I cannot pinpoint how or why it is doing this. It has displaced in the positive Y direction and in the negative Y direction on separate runs of the same piece (which is just a poker chip I found on Thingiverse). 

Is this a software issue (Simplify3D) or a hardware issue? Can anybody suggest a fix?

See the following photos:

[![3D print exhibiting positive Y displacement mid-print](https://i.stack.imgur.com/b9Kyv.jpg)](https://i.stack.imgur.com/b9Kyv.jpg)

[![Close up of 3D print exhibiting positive Y displacement mid-print](https://i.stack.imgur.com/1yH40.jpg)](https://i.stack.imgur.com/1yH40.jpg)