as far as I know - the component time is in clock cycles - not us... sam
On 05/15/2016 06:54 PM, Jon Elson wrote: > I've been having small jumps in position for a long time on > my Bridgeport with my PPMC boards. Couldn't quite be sure > it wasn't operator error, but it seemed to be getting more > frequent. Today I had more of it, and I was really sure I > didn't hit any wrong buttons or anything. > > I've just replaced the encoder counter card in the PPMC, and > so far it is always returning to the same coordinate. > I'll have to keep checking for a while to make sure it > continues to position reliably. > > Anyway, I had a really weird thing happen. I just swapped > the card and started LinuxCNC, and when I was jogging, I > noticed the jog continued after I released the keyboard jog > key. Trying a few other things, I noticed the GUI was > really sluggish, too. So, then I checked the show hal > config parameters, to see if any tasks were running long. > The hal_ppmc component was running vastly long, overrunning > the whole servo thread. It was running a very steady 1.3 ms > for that component only! I thought if the real time tasks > overran their period, you'd get a warning, at the least! > But, I didn't see a thing. (Hmm, I wonder if a thread > overrun could foul up the GUI so badly that it lost the > message that there was an overrun? Is that possible?) > > I couldn't find anything wrong with the board, put it back > in, and the ppmc run time was back to normal. Must have > been a dirty contact in motherboard. > > I'm running2.5.4 with Axis. > > This coordinate jumping can be really hard to find. I'd > think if it happened all at once, I'd get a prompt following > error. So, it must be happening a little at a time, > although when I notice it, it seems to have happened all at > once. > It appears to have happened on all axes, and maybe happens > to two axes at about the same time. > > Well, any comments would be welcome. > > Jon > > ------------------------------------------------------------------------------ > Mobile security can be enabling, not merely restricting. Employees who > bring their own devices (BYOD) to work are irked by the imposition of MDM > restrictions. Mobile Device Manager Plus allows you to control only the > apps on BYO-devices by containerizing them, leaving personal data untouched! > https://ad.doubleclick.net/ddm/clk/304595813;131938128;j > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
