Z axis suddenly runs at a very reduced speed

Just finished building the Altmill and it seemed to be running great. Did my homing and all was well. On my next project the X speed has reduced to a crawl in comparison to the Y and Z.
Any ideas?

Thanks in advance
Stan

Found my answer.
Very loose dip switch on the back of the x axis motor.

Hope this helps someone else that may have a similar problem.

Thanks Stan