Actually, isn't that 5V output derived from the 24V field power input anyway?
------Original Mail------ From: <p...@wpnet.us> To: <emc-users@lists.sourceforge.net> Sent: Wed, 29 Oct 2014 14:50:02 -0500 Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 The encoder is powered from TB3 pin 21 and 23 since it's 5V and field power is 24V. Is it safe to tie the grounds together? ------Original Mail------ From: "Peter C. Wallace" <p...@mesanet.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Wed, 29 Oct 2014 12:45:32 -0700 PDT Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 On Wed, 29 Oct 2014, p...@wpnet.us wrote: > Date: Wed, 29 Oct 2014 14:42:34 -0500 > From: p...@wpnet.us > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 > > Both show good in the Tek 'scope with the probes clipped onto the little bit > of wire accessible from the screw terminals on the 7i76. Hard to imagine the > wire clamped in the screw terminal but not making contact. With LinuxCNC > running doesn't it reset that count with each read so it only will show the > counts since the last read? > A likely culprit is this: The MPG common must connect to the field power ground (the counter will not be reset unless you specifically clear it) > > ------Original Mail------ > From: "Peter C. Wallace" <p...@mesanet.com> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Sent: Wed, 29 Oct 2014 12:39:08 -0700 PDT > Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 > > On Wed, 29 Oct 2014, p...@wpnet.us wrote: > >> Date: Wed, 29 Oct 2014 14:04:00 -0500 >> From: p...@wpnet.us >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: emc-users@lists.sourceforge.net >> Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 >> >> Ok, I verified the pin and changed the line in the HAL to: >> >> net mpg_count hm2_5i25.0.7i76.0.0.enc0.count => axis.0.jog-counts >> axis.2.jog-counts axis.1.jog-counts >> >> With halcmd I can show hm2_5i25.0.7i76.0.0.enc0.count and see it go to 1 >> briefly when spinning the MPG, so it looks like the signal is getting in ok >> but I'm still not getting any axis movement. >> > > if it does not count beyond 0,1 that indicates that either A or B is not > being seen (either a wiring or level issue) > >> >> >> ------Original Mail------ >> From: "Peter C. Wallace" <p...@mesanet.com> >> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >> Sent: Wed, 29 Oct 2014 11:13:06 -0700 PDT >> Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 >> >> On Wed, 29 Oct 2014, p...@wpnet.us wrote: >> >>> Date: Wed, 29 Oct 2014 12:57:50 -0500 >>> From: p...@wpnet.us >>> Reply-To: "Enhanced Machine Controller (EMC)" >>> <emc-users@lists.sourceforge.net> >>> To: emc-users@lists.sourceforge.net >>> Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 >>> >>> hm2_5i25.0.encoder.00. is the hardware high speed encoder? >>> hm2_5i25.0.encoder.01. is not the low speed encoder? >> >> hm2_5i25.0.encoder.01 is the spindle encoder for the second 7I76 (assuming >> you >> are using a 7i76x2 config) >> >> hm2_5i25.0.7i76.0.0.enc0 >> >> is the first MPG encoder (it may have a different name in master) >> best thing for checking is to list all the pins with >> >> halcmd show pins > pinlist.txt >> >> when linuxcnc is running >> >>> >>> I've been looking through all the HostMot2 docs I can find including the >>> section on encoders and it's not very clear to me. >>> >>> http://www.linuxcnc.org/docs/2.6/html/drivers/hostmot2.html#_encoder >>> >>> The PNCConf seems to think hm2_5i25.0.encoder.00. is the high speed spindle >>> encoder input, so i presumed that when set to mode2 the low speed encoder >>> inputs GPIO 16..19 would occupy the next two encoder instances. >>> >>> The only reference to the low speed encoder inputs I've found is the >>> sentence or two on pg.18 of the 7i76man.pdf you pointed out. Surely there >>> is a more detailed explanation of this somewhere? >>> >>> >>> >>> ------Original Mail------ >>> From: "Peter C. Wallace" <p...@mesanet.com> >>> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >>> Sent: Wed, 29 Oct 2014 10:43:46 -0700 PDT >>> Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 >>> >>> On Wed, 29 Oct 2014, p...@wpnet.us wrote: >>> >>>> Date: Wed, 29 Oct 2014 12:29:53 -0500 >>>> From: p...@wpnet.us >>>> Reply-To: "Enhanced Machine Controller (EMC)" >>>> <emc-users@lists.sourceforge.net> >>>> To: emc-users@lists.sourceforge.net >>>> Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 >>>> >>>> http://wpnet.us/Harrison2.ini >>>> http://wpnet.us/Harrison2.hal >>>> >>> >>> The problem I see is the the mpg is connected to the spindle encoder on P2 >>> (channel 1) not the mpg encoder on the 7i76 field I/O >>> >>> >>> >>> Peter Wallace >>> Mesa Electronics >>> >>> (\__/) >>> (='.'=) This is Bunny. Copy and paste bunny into your >>> (")_(") signature to help him gain world domination. >>> >>> >>> ------------------------------------------------------------------------------ >>> _______________________________________________ >>> 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 >>> >> >> Peter Wallace >> Mesa Electronics >> >> (\__/) >> (='.'=) This is Bunny. Copy and paste bunny into your >> (")_(") signature to help him gain world domination. >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> 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 >> > > Peter Wallace > Mesa Electronics > > (\__/) > (='.'=) This is Bunny. Copy and paste bunny into your > (")_(") signature to help him gain world domination. > > > ------------------------------------------------------------------------------ > _______________________________________________ > 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 > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. 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