The electronics that take the impulses from the computer and make the motors turn.
By Woodie1949
#824
I'm have trouble finding the Test points for testing the Controller prior to installing the stepper motor control chips
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By AJ Quick
#829
I had replied to your email, but I'll post this here in case anyone else is having trouble spotting them.

I have marked the testpoints with arrows in this diagram:

Image

TP1 for X Axis,
TP2 for Y Axis
TP3 for Z Axis
5V for testing 5V rail.

Test with a multimeter between the test point and the ground screw terminals.

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Testing the 3 Axis Controller

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