Motion Control drivers and motors

[irving2008]

I am using a similar BOB but was half the price and made by a CNC user, the board is milled on a CNC machine itself and comes with 4 PCB stand-offs.

http://www.cncdoctor.co.uk/ParallelP...ard(P.004).pdf

Bruce. That BOB MUST be used driving the opto's in ACTIVE LOW configuration. Its half the price because it has no active drive components, its just a connector. The PC on its own will not have enough output drive to drive the optos in active high mode. The signals on the MDSxxx are labeled thus Step+, Step- and Dir+, Dir- The - connections need to go to your driving signals and the + connections to a source of +3.3 or +5v power. This can be got off a USB connector, off a spare disc power connector inside the PC or via a cheap 5v regulated wall-wart. See pic.