Router turns on when 5v applied
I received my Super-PID a few weeks back and hooked it up to power as soon as I could just to see if it would work. All went well and I was able to control the speed of the PC7518 router using the provided pot. I really like this unit so thanks a lot for developing it.
However, I want it to be controlled by my computer using EMC2 so I have now attached it to 5v via a USB port on the back of the PC and I have connected it to a PWM signal and on-off control on the parallel port thru a breakout board. Mains are also on. I have unhooked the pot so as to be PC control only and I have put in the necessary jumper wire in the pot's place as shown in the manual.
As soon as I turn on the PC, the USB gets power and turns on the Super-PID. That's good, but then the router spools up and settles pretty quickly on 5000 RPM. I am not expecting the router to run yet. Once I boot up EMC2, I am able to use the virtual buttons in EMC2 to toggle the router off and on, but it's the opposite of what it should be. Off is on and on is off. This also keeps me from being able to control the speed because the virtual buttons for that grey-out when you depress "off" which actually turns it on.
Like most of the things I have messed up on this machine build, this seems like a pretty simple problem, but I am new to soldering and working with electronics so I wanted to know what the likely cause is before I try anything on my own and risk making smoke. Does crossing the 5v and ground wires have this affect?
I am really close to "done" with this build after about 18 months of work and I want to do this as right as I can. (My machine build is here: http://www.cnczone.com/forums/diy-cn...cnc_beast.html )
Thanks,
Andy