Re: [Emc-users] losing encoder counts
Lol.. I remember Chris R was working on rigid tapping at one of the fests in galesberg.. He was using the mazak which had been converted to linuxcnc.. (I think it had been worked on over a couple fests. ). Anyway - it didn't seem to be tracking the correct pitch.. (Tapping in plastic). Chris was trying to think what could be wrong with his code and johnk walked over and listened.. Then said 'could the z axis scale be off?'. It was.. I could see that situation cause you to go down a lot of rabbit holes before thinking about the z axis scaling (At least that is how I remember it..). :) On Wed, Oct 5, 2022, 9:59 PM Jon Elson wrote: > Wow, it gets deeper! > > It is NOT the encoder, or anything in the encoder-reading > process. > > I marked the motor shaft, and the motor is returning to the > exact same position every cycle. > > Well, I tried a different indicator and mount, and the > problem was in the indicator mount! I was using an old > knock-off of an IndiCol that clamps around the spindle nose > or end mill holder and has several rods with locking > thumbnuts on them. These swivel joints were slipping just a > tiny bit each time the vise touched the indicator, even > though they were PRETTY tight! Ugh, 3 days of going around > in circles trying to tell where the issue was! > > Jon > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] losing encoder counts
You must be a happy camper other than the lost time. In my case the DRO was telling me things were off. And of course holes in the wrong place. John > -Original Message- > From: Jon Elson [mailto:el...@pico-systems.com] > Sent: October-05-22 7:54 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] losing encoder counts > > Wow, it gets deeper! > > It is NOT the encoder, or anything in the encoder-reading > process. > > I marked the motor shaft, and the motor is returning to the > exact same position every cycle. > > Well, I tried a different indicator and mount, and the > problem was in the indicator mount!� I was using an old > knock-off of an IndiCol that clamps around the spindle nose > or end mill holder and has several rods with locking > thumbnuts on them.� These swivel joints were slipping just a > tiny bit each time the vise touched the indicator, even > though they were PRETTY tight!� Ugh, 3 days of going around > in circles trying to tell where the issue was! > > Jon > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] losing encoder counts
Wow, it gets deeper! It is NOT the encoder, or anything in the encoder-reading process. I marked the motor shaft, and the motor is returning to the exact same position every cycle. Well, I tried a different indicator and mount, and the problem was in the indicator mount! I was using an old knock-off of an IndiCol that clamps around the spindle nose or end mill holder and has several rods with locking thumbnuts on them. These swivel joints were slipping just a tiny bit each time the vise touched the indicator, even though they were PRETTY tight! Ugh, 3 days of going around in circles trying to tell where the issue was! Jon ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
