hi i have a couple questions i can't figure out, i have two airpax 4shg-060a-46s Unipolar Stepper Motors 6v 7.1 ohms 1.8/step. first problem is i know the 3 wire groups and i know the center tap of each coil (5&6) i just don't know what wire is 1,2 and 3,4 am i going to have to take one of them apart?
pink-------------------| |>7.1 ohms black = center tap-----| |>7.1 ohms blue-------------------|
brown------------------| |>7.1 ohms white= center tap------| |>7.1 ohms yellow-----------------|
my next question is from all the reading i'v been doing, 6v divided by 7.1 ohms is going to give me .84 amps but from the code it looks like two coils will be pulled in at the same time, and i'd like to use a computer power supply 5v is this possible on a 6v motor? or will i have to use a mosfet and use the 5v from the chip to switch 6v to each stepper coil ?
i would like to be able to control the cw and ccw rotation and speed if possible, i have an uno and a duemilanove so output pins are a concern.
On this page there are two different wiring diagrams the first only uses two output pins where the second uses 4 of the arduino. what is the advantage to using one setup over another?
As for the airpax motors i'm unable to find a pdf file for them because airpax merged with another company and i guess the documentation is gone.
In the end i'd like to run 3 motors off one uno if possible, i did see some where there was a shield that goes on the uno that would extend the i/o to 48 through flat ribbing cable or ide cable but i can not find the web sight again to save my life. does anyone know the web page?
thank you for taking the time to answer my questions