On Sat, 6 Jul 2013, andy pugh wrote: > Date: Sat, 6 Jul 2013 20:43:53 +0100 > From: andy pugh <bodge...@gmail.com> > Reply-To: EMC developers <emc-developers@lists.sourceforge.net> > To: EMC developers <emc-developers@lists.sourceforge.net> > Subject: Re: [Emc-developers] "Open" Development > > On 6 July 2013 20:32, Chris Morley <chrisinnana...@hotmail.com> wrote: > >> infinite jerk is impossible for a machine to produce movement for. > > I am not sure that is necessarily true. (unless you really are talking > about elastic deformation of the machine parts) >
Practically its not possible to provide infinite jerk with drive systems because of the delay in changing current in the drive motor. For full scale current changes this will typically be in the 1 to 10 ms region, depending on motor inductance and (bus voltage = motor back EMF). This implies that you will get spikes in following errors (that you cannot tune out) at torque reversals and that these spikes will get larger at higher speeds. > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Windows: > > Build for Windows Store. > > http://p.sf.net/sfu/windows-dev2dev > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
