> > Message: 3 > Date: Tue, 25 Aug 2015 19:57:24 -0400 > From: Tom Easterday <tom-...@bgp.nu> > Subject: [Emc-users] motor to spindle gear ratio > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Message-ID: <df6fad10-15e8-4920-87e6-c1d25b652...@bgp.nu> > Content-Type: text/plain; charset=utf-8 > > I was working on some issues with the lathe today and discovered that what > I thought was a 1:1 relationship between the pulley on my spindle motor and > pulley on the spindle head - is not. The diameter of the spindle pulley is > 4.2125? while the spindle itself is 5.175? (they are probably actually > 107mm and 130mm or thereabouts). This give a 0.833 ratio and explains why > 3500rpm is actually spinning at about 3000rpm according to my tach. I am > wondering the best way to let Linuxcnc know that this is the case so that > commanding 3000 gives me 3000. > > -Tom > > Tom,
On my mill, my GS2 VFD speed was 'off' (not to mention backwards), and I used the loadrt scale count=1 in my cutom.hal file to accommodate for that. You can read about it here in the docs: http://linuxcnc.org/docs/html/examples/spindle.html Not sure that's what you're looking for, but maybe it helps. Good luck, Mark ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
