avr_fred:
Going lower in pot resistance makes the problem of end resistance worse, not better. In addition, most references top out at about 10ma of source current so a lower resistance pot is really not practical nor desired.
You are correct I was meaning 20k - 50K Ohm
avr_fred:
That make no sense to me. Unidirectional convention is that zero volts is zero speed and +10 volts is max speed. What does 7.87 volts have to do with stopping or min speed?
You asked what what voltage I had from S0 to S2 I'm getting 7.87v. my blabbering was more about I know I have 10v coming into the digipot if I have 7.87 going to S0 (ground) then the other 2.13v must be going to S1 possibly causing the motor to idle.
avr_fred:
S0 is ground, it has nothing to do with a brake. Did you have this drive configuration running with analog pots first? If so, please post a drawing of how things are wired as this discussion is now at a stage where you statements are no longer matching up with the original description.
When I wire the drive exactly as the datsheet illustrates using a 10K ohm potentiometer the motor works perfectly (see the attachement) turn the pot one way I get full speed, the other direction stops. my issue is I am trying to automate this 10K ohm pot. This may be the wrong way to do this, if there is a better way I am open to it.
Thank you for your help
