If you cannot see the signal on pin 17 of your parallel port using an real oscilloscope, then you may have issues with your HAL file bringing the signal to the actual output pin.
Also, I would caution that the signal should be somewhere between 100 Hertz and 10 kHz in frequency. Normally the EMC servo thread defaults to 1 kHz which is fine, but since this is a stepper based system, are you sure that you don't have your charge pump signal generator running at the much higher base thread rate? Regards, Steve Stallings -----Original Message----- From: Mike Cinquino [mailto:mcinqu...@gmail.com] Sent: Saturday, May 21, 2011 2:58 PM To: emc-users@lists.sourceforge.net Subject: [Emc-users] Charge Pump on PMDX-131 Hello, I am attempting to get the charge pump on a PMDX-131 working. I have had this board for years and am just getting around to trying to get this working. I have a charge pump output setup on pin 17 as described in the PMDX-131 manual. Because I was unable to get this to work I also attempted to use a CNC4PC external charge pump board through a PMDX-131 output (Pin 16). This did not work either. I used Halscope to watch the output pin signal and I am getting a signal from EMC2 as expected (at least internally). I then hooked an oscilliscope to the output and did not get a matching signal. I have no signal at all. I connected the CNC4PC charge pump to a signal generator and it worked as advertised. I also have a spindle motor working through PMDX output 1 relay K1. Has anyone used the charge pump on the PMDX-131 with EMC2 successfully? Is there anything obvious that I am missing? My thought is that maybe the buffer on the PMDX can't handle the HZ. I am basing the signal off my servo thread and have manipulated that up and down to but see no output. I changed parallel port cables also. Thanks, Mike ---------------------------------------------------------------------------- -- What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
