> On May 23, 2012, at 2:01 AM, Claude Froidevaux wrote: > > >> 1) make a hal check, that disable drive if more than 5-10 consecutive >> sample period with maximum drive output without any encoder change >> >> This won't work in Jeshua's setup. When coming out of E-stop, there is no commanded motion, and the positioning loop has not yet started. So, LinuxCNC doesn't expect any movement. The G320 drive commands movement to null out the position error, which may only be one or two counts. If the encoder does not provide feedback, there is no indication that a runaway is happening.
LinuxCNC never sees the drive command, it just sends step pulses to the drive. If it could compare the commanded position to the actual position, that might be helpful, but the hardware doesn't allow this. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
