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SmartBOB controllers and dedicated accessories / PMDX416 Limit Switch & Probe Input Wiring Voltage troubleshooting
« on: February 09, 2021, 11:15:07 PM »
Windows 10 64bit, Mach4 4.2.0.4300 PMDX 0.53.263 Firmware 0.60.208 No errors in Mach4.
I am using the PMDX 416 with the PMDX 407 Spindle Speed Controller to drive a homebrew version of the CNCRouterParts 5x10 machine. Using NPN 12v limit switches powered by external supply with the AvidCNC corner finding touch plate. Motion works. XYZ all happen, can drive the machine by jogging, etc. The worst part is this machine was functional in the prototype phase but by moving the electronics into a proper grounded enclosure, using proper wiring and cable management, upgrading the computer, something broke and no longer works.
I cannot figure out why Pins 10-15 are non functional and always are high (+5v). Not sure if the board isn't working correctly, etc. If measure voltage from ground to +5v on J5 or J7 connectors, I don't get anything, and if I use a jumper wire to jump ground to a pin or 5v to a pin (10-15), nothing changes in the real time monitoring, in the mach status window, etc.. I've enabled them in Mach Settings as inputs, and no dice. What's the best way to troubleshoot this? See attached screenshot of the I/O status to see that the pins are all high.
My current testing (no pun intended) is to enable Mach4 and start things running, jog the machine to verify everything is connected and working, and then start trying to measure voltage across pins etc. All of my output signals in the I/O status window work properly, but i can't get the inputs to show anything. I have tried connecting the probe to +5v and pin 15, gnd and pin 15, and configured it both active low and high and still nothing.
I am using the PMDX 416 with the PMDX 407 Spindle Speed Controller to drive a homebrew version of the CNCRouterParts 5x10 machine. Using NPN 12v limit switches powered by external supply with the AvidCNC corner finding touch plate. Motion works. XYZ all happen, can drive the machine by jogging, etc. The worst part is this machine was functional in the prototype phase but by moving the electronics into a proper grounded enclosure, using proper wiring and cable management, upgrading the computer, something broke and no longer works.
I cannot figure out why Pins 10-15 are non functional and always are high (+5v). Not sure if the board isn't working correctly, etc. If measure voltage from ground to +5v on J5 or J7 connectors, I don't get anything, and if I use a jumper wire to jump ground to a pin or 5v to a pin (10-15), nothing changes in the real time monitoring, in the mach status window, etc.. I've enabled them in Mach Settings as inputs, and no dice. What's the best way to troubleshoot this? See attached screenshot of the I/O status to see that the pins are all high.
My current testing (no pun intended) is to enable Mach4 and start things running, jog the machine to verify everything is connected and working, and then start trying to measure voltage across pins etc. All of my output signals in the I/O status window work properly, but i can't get the inputs to show anything. I have tried connecting the probe to +5v and pin 15, gnd and pin 15, and configured it both active low and high and still nothing.