Both Y motors spin clockwise. Hence, each side of the gantry travels in a different direction

I have just set up my 1000mm X-carve and I’m having trouble with the Y axis traveling synchronized. Has anyone else dealt with this issue?

from the instructions

With two motors on the y axis facing each other, you’ll need to flip one of the y pairs for the motors to move in the same direction. The diagram above shows the black and green wires flipped on Y2.

notice the “GREEN and BLACK” wires are reversed on Y1 as opposed to Y2

Great! Thank you very much.