Hello, all, I'm running a pretty stock 2.5.4 version of LinuxCNC on my Bridgeport. The only thing I have changed is to add the camera tab to Axis with camview. The motion system is my PPMC analog velocity board set. I have lately started getting following errors during slow motion. I at first suspected a chip in the ballscrew, but then it started happening on different axes. I lately have left Halscope running, hoping to trap what is going on. Well, I finally got it, and it is really strange!
See http://pico-systems.com/images/false_error.png for the Halscope trace. The selected trace is in white, the X axis following error (pid.0.error). Trace 4 (purple) is amp-enable, and triggers the capture on the falling edge. You can see the X following error is quite small, and actually decreasing. It is well below the following error threshold in the ini file. I did get the "following error on axis 0" message on the Axis screen. This can happen several times during a machining session, seemingly at random. Has anyone seen this before? I have no idea what is happening, but clearly the PID component is not sending out any indication of a large following error, but whoever reads that and declares a following error thinks that it has! Thanks for any insight anybody can offer! Jon ------------------------------------------------------------------------------ Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical & virtual servers, alerts via email & sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
