that each motor has four wires: blue, yellow, green, and red, in that order. Plug the motors in as
such:
X Axis:
RED
WIRE UP
Y Axis:
BLUE
WIRE UP
Z Axis:
BLUE
WIRE UP
If for some reason when you run the machine, movements turn out opposite the way they
should (for example if an X+ movement were to move to the left or a Y+ movement were to
move the table away from you), then the plug on that axis is backwards. On rare occasions, the
direction settings on the stepper drivers are reversed, so you should just be able to power
everything off and flip the plug.
Note that it is important that the fan blow directly on the stepper motor drivers when the
machine is powered on. The drivers come with small heat sinks that can be attached with
thermal adhesive (not included). If attached properly, they can help wick heat away from the
driver, but the fan blowing directly on the stepper motor drivers keeps things adequately cool,
even on long jobs. The fan need to be blowing onto the drivers, not away from them. Starting in
January 2017, some kits shipped with a 3D printed standoff for mounting the fan to the left
frame. If you d
on’t have this piece, it’s not considered “missing” as January 2017 began with just
a limited number being packed. If you don’t have a 3D printed standoff, you might wish to fab
up a mount as a first project, but you can also simply let it sit unmounted next to the board. For
those with the 3D printed standoff, you will mount it by screwing it into the left frame piece with
the short wood screws then affixing the fan to the standoff using the long machine screws. The
machine screws will cut threads into the 3D printed piece to hold it in place. See the below
picture.
TEST MOVEMENTS
This step will just test some movements. Very slowly manually push the X axis Bearing Plate to
the center of the X Axis V Rail. Center the Y axis (moving bed) up as well. Be aware that motors
create a voltage when turned. If you push things around quickly, you could create enough
voltage to blow the electronics. Pushing slowly by h
and is OK, just don’t zip things around.
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