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Stepper driver connections

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John Rudd:
Chris,
Yes that is correct.....Don't let the magic smoke out.... :zap:

awemawson:
You're welcome - let us know how you get on.  :zap:

Noitoen:
Those +/- signals are differential signals more immune to noise. You can use ttl to rs485 converters to adapt the signal such as http://www.ti.com/lit/ds/slls101d/slls101d.pdf This is a transceiver chip and you can use the transmit side to convert the single line to double. There are more chips for this in the market. Industrial encoders use the same system.

Hope this helps  :beer:

Dawai:
Very neat, you do understand "THOSE connections are for the polarity" of the signal you are supplying? probably opto isolated LED-transistor inside it, so you can use a positive signal and a negative on the other side, or a positive pwr and a negative (sinking) Signal on the other side. Think of a opto-diode as a one way switch, power flows through in one direction only, and "if you have a negative (sinking) signal, or a Positive (sourcing signal) it will work with either by routing the proper "other pwr" to the other terminal.

I want one too.. my problems.. well.. the arduino "reprap" code I downloaded has a 1ms signal length, a "geckodrive" from www.geckodrive.com has a desire for a 6ms signal.. so.. I was going to go in and alter the wavelength in the arduino code.. but the new "look ahead software" is so complicated I need a school sized chalkboard to keep track of what goes where,when and how.

I want to see this project work, as I am hard on your heels with one of my own.
I ran the 3d printer drives (geckos from my cnc mill) with the 2amp motors in Mach3 just the other day (pc based).. I have had more trouble with the WINDOWS on the cnc than the cnc.. even with the dog pulling cables out the side.. (+300 wires going to shop automation)

THIS arduino has been a new interesting journey for me.  It kicks the basic stamps butt that turned me off on micro-controllers for sure.

I do not mind sharing anything I have figured out.

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