How do I slave 2 external stepper drivers together?

Controllers Smoothie
,
1

How do I slave 2 external stepper drivers together? I have 2 Y axis steppers, and they are running on external stepper drivers. How would I configure them to act as a single axis?

2

OK, figured it out, just run them in parallel.

3

Just be aware that in parallel, you’ll double the current need.

This is one way of doing it
http://reprap.org/mediawiki/images/b/b1/Reprappro-huxley-z-motor-wiring.png

4

I have a driver for each Y axis stepper.