Hey, I was hoping to get just a bit of support on this topic.
Pololu SMC 18v7 fully assy
Linear Actuator (12 v)
National Instruments - NI 9074 cRIO w/ analog Input, analog output, digital I/O available
Pololu SMC Windows 7
I can move the linear actuator using the USB.
I have setup my lab view with conditional statements so that a temperature range is exceeded, the analog output supplies 1v or 3v, to cause the retraction or extension of the linear actuator. 1v = -100% and 3v = 100%, there is also a condition for acceptable range temperatures to output 2v, which i hope should be 0%. With the supplied voltage, my intent is to use the analog input and cause action using the emulated potentiometer readings. (1 or 3v)
Right now, when I go to LEARN - i get an error that says, “Analog 1 (Invalid connection)” or something similar.
-I’m not really sure what the minimum amount of wires I need to connect to the SMC from the cRIO to get this working. I feel like I am most of the way there on my concept, but I am just unfamiliar with the wiring. I have tried putting the analog output on the pot(-) and pot(+) connections, as well as a few other configurations with the two wires. I am wondering If I need to supply a 3v DC to the Analog Input (Yellow in manual) and then commonly ground the connections? Do I need to put the jumper somewhere on the board? What is the correct wiring?
Keep it simple, I don’t know how to do the TTL / serial connection, so I was hoping to use the analog control.
Thanks for your help.