I tried also with 25% more on stepgen_maxvel and maxaccel. Not better. I checked the enable, it works fine. Pncconf was generating a different named net. Once fixed at least the axis moves. But I get following errors and occasional grinding if I increase the MIN_FERROR
I rechecked within pncconf just to make sure I was not dreaming, it works great in there. I can let it go back and forth over 100mm at 2800mm/min (1/8 microstepping, 0.2 inch per turn leadscrew => scale of 314...something...) for as long as I want. Very nice movement, no grinding, no missed steps, it stops and reverses smoothly without problems. then I finish pncconf, let it write the configuration, startup linuxcnc and get a following error if I get past like 1mm/min... So I would say pncconf testing is definitely using something different from linuxcnc. How can I check what pncconf is using ? Another experiment I just did that gives some interesting results: I went back to my stepper driver specs and found I was using values for dirhold, dirsetup, steplen and stepspace that were way too small. After adjusting them, I can jog an axis up to 2800mm/m, no problem ! however: - if I stop the movement and continue in the same direction : no problem, it will start moving (and stop) smoothly - if I stop the movement and go jog in the opposite direction, I immediately get a following error. Bruno On 2/9/14 8:43 PM, emc-users-requ...@lists.sourceforge.net wrote: > Message: 3 > Date: Sun, 9 Feb 2014 17:08:01 +0000 > From: Chris Morley<chrisinnana...@hotmail.com> > Subject: Re: [Emc-users] Emc-users Digest, Vol 94, Issue 17 > To: EMC<emc-users@lists.sourceforge.net> > Message-ID:<blu174-w8a58134e0528b672702bac0...@phx.gbl> > Content-Type: text/plain; charset="iso-8859-1" > > > > >seems like it would be best to specify 0 for both of those as the per > >axis limits would still be in place ? > >I am going to play with that and see... thanks for the reply > > > Don't set them to 0. It doesn't work reliably. > Pncconf sets them to 25% more. > > Does your drives require an enable ? I would check that signal with > halmeter or a real meter. > > While pncconf uses the same numbers as it tunes ( as long as you clicked > accept) > It doesn't use the same HAL code in the test as in linuxcnc so problems can > creep in and bugs are always possible. > > Chris M > > ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
