The only thing I can think of to try right now is doing a fresh firmware install, since it seems like something's screwy on the controller.
That did the trick! My plunger is now working. Thank you very much for the help.
Glad to hear it! I still have no idea what the actual problem was, but hopefully whatever it was won't come back.
I have a PC I hook up the boards to via USB, but it's a test system and my main PC. I am going to hookup the power to the main expansion board via a power supply I have and am going to hook the 5v and 12v to the main board from that one power supply. Any concerns with this? I assume not.
Right - that's fine. You can use separate power supplies for the "PC power supply" and "Secondary PSU" inputs if you want, since the two sections are isolated on the boards, but it's also okay to power everything from the main PC power supply.
The main reason to use two separate power supplies is that it gives you more power overall, to ensure that any heavy-duty feedback devices (particularly solenoids and motors) don't cause brownouts (supply voltage reductions) on the main PC power supply. It also helps reduce the amount of electrical noise transmitted from the high-power devices into the logic circuitry.
I am going to hook two contractors up to the power board and have a 24v PSU for it. I assume I need to combine the grounds from the above PSU and the 24v PSU?
Correct. If you haven't read through it already, my recommendations for the feedback power setup are covered here:
http://mjrnet.org/pi...d=powerSupplies




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