2. **edit - possibly a one off with the print, check how hot your stepper motors are also, if they are really really hot to touch the pot's need to be turned down on the ramps board, which is easy to do.
for you maybe lol
But that entire sentence probably needs explaining.
Basically I think you're saying turn down the electric current going to the motors ?

That said - the issue is pretty much certain to be communication.

Ended up with half a bowl last night because I forgot I'd switched the monitor off and was printing direct from the computer. So when I went to turn the computer on - I inadvertently switched it off and got half a bowl :-)

Printing from the card is so much better and probably essential for larger prints.