On Sun, 9 Feb 2014, bruno wrote: > Date: Sun, 09 Feb 2014 21:52:52 +0100 > From: bruno <br...@tinkerbox.org> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] mesa 5i25, pncconf working but not linuxcnc (bruno) > > I tried also with 25% more on stepgen_maxvel and maxaccel. Not better.
stepgen_maxaccel needs to be about 25% more than the maxaccel for each axis or you _will_ have following errors > > 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 ? > halcmd show param > 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 > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ 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
