What are you printing with?
a printer or the mpcnc?
Your stepper driver vales are way off, try .7V not 1.7V. You are probably going into thermal shutdown.
You speeds are kind oall over the place as well completely wrong if you are using the mpcnc, could be right for a printer.
Some pictures and more info would help.
What size steppers, why not repetier? If you are lost you should stick to the recommended build and software where all the info is already laid out including speeds and accelerations.