On Tue, 13 Nov 2012, Viesturs L?cis wrote: > Date: Tue, 13 Nov 2012 22:12:33 +0200 > From: "[UTF-8] Viesturs L?cis" <viesturs.la...@gmail.com> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Floating plasma torch - asking to share experience > > 2012/11/13 Peter C. Wallace <p...@mesanet.com>: >> >> It should be noted that this should be possible with any torque mode servo >> and some HAL magic. > > Peter, could You, please, explain in little more detail, how do You intend > that? > This machine has 4 servos, including Z axis, driven by 2 pieces of 7i39LV. > > The way I see is that there are 2 setting for PID loop - one should be > relatively soft (command for probing move would be "select" for mux2 > components, which would change the PID parameters) and Z axis ferror > pin should be watched and "torch has touched material" event would be, > when ferror exceeds a certain value, for example, 0,5 mm. Or am I > thinking in wrong direction? > > -- > Viesturs > > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto
You can sense ferror or PID output (on a torque mode drive) on a voltage mode drive like the 7I39, ferror (and a slow move against a resiliant stop) is probably the best route for "switchless" limit sensing > > ------------------------------------------------------------------------------ > Monitor your physical, virtual and cloud infrastructure from a single > web console. Get in-depth insight into apps, servers, databases, vmware, > SAP, cloud infrastructure, etc. Download 30-day Free Trial. > Pricing starts from $795 for 25 servers or applications! > http://p.sf.net/sfu/zoho_dev2dev_nov > _______________________________________________ > 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. ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
