Motion Control drivers and motors

[bruce_miranda]

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

[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.

[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. It 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 - connectoins neednto 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.