FWIW Marius, my index seems to be working fine, I did the test Peter suggests below when I got the encoder wired to see if my index was working. And at 300 rpm (the speed at which my G76 is failing) the pulse should come every 200ms, well within the servo period. I am traveling so haven't yet checked the polarity of the pulse as someone suggested in the other thread.
But the thing I am suspicious of is why my lathe suddenly changes the plane to G17 when my threading fails. Does your lathe do this? -Tom > On Jul 5, 2015, at 9:03 AM, Peter C. Wallace <[email protected]> wrote: > >> On Sun, 5 Jul 2015, Marius Liebenberg wrote: >> >> Date: Sun, 05 Jul 2015 11:28:07 +0000 >> From: Marius Liebenberg <[email protected]> >> To: "Enhanced Machine Controller (EMC)" <[email protected]> >> Subject: [Emc-users] Index pulse on 5i25 with 7i76 >> >> I have the above installed on my lathe and I am having problems with >> getting threads cut. In a previous discussion someone mentioned that >> their lathe just sits and waits for something when using G76. I have the >> same. So I put Halscope on the 5i25.encoder.index-input to see what is >> coming out. Not surprising I only get an index pulse every couple of >> turns and it is erratic to say the least. >> I have a 1:1 AMT201 encoder on the spindle. >> Is there anything special to be done to get the index pulse to be >> present? > > > You should not expect to see a consistent index signal from > 5i25.encoder.index-input as this is simply the real time index input > state. Since this is only sampled at the servo thread rate and the index > pulse > can be much shorter than the thread period, you may only see this > occasionally > when moving at medium to high speeds > > > To test index operation, you can "sets" the index-enable signal (not pin) > manually and see if the signal gets cleared at the index position. > > >> >> >> ----------------------------- >> Regards / Groete >> >> Marius D. Liebenberg >> +27 82 698 3251 >> +27 12 743 6064 >> >> ------------------------------------------------------------------------------ >> Don't Limit Your Business. Reach for the Cloud. >> GigeNET's Cloud Solutions provide you with the tools and support that >> you need to offload your IT needs and focus on growing your business. >> Configured For All Businesses. Start Your Cloud Today. >> https://www.gigenetcloud.com/ >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> 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. > > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
