Help!

I.am building larger 3D printer and like to now how to connect external motor driver 3128A to my welleman controller (K8200).

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Here you have the complete manual for the K8200 Velleman.

I hope this helps you in your quest

http://www.vellemanusa.com/downloads/files/k8200/manual/en/assembly_manual_k8200_uk.pdf

gr

steve