--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Troy,
>
> It depends.  The normal thing about an index pulse is that the pulse happens every revolution of the encoder.  So if you just move to the index pulse you could still be anywhere in the range of motion depending on where you started.  So some additional means of getting close within one rev of the encoder is needed.  That could just be manual jogging.
>
> Regards
> TK
>
>
>
> ________________________________
> From: tmday7 <brotroy7@...>
> To: DynoMotion@yahoogroups.com
> Sent: Wednesday, July 4, 2012 1:19 PM
> Subject: [DynoMotion] Re: Absolute or Incremental
>
>
>
>  
> :) Nice, I got one right for a change.
>
> Could the index be used without a switch? Reason is, this encoder would be on a rotary 4th axis, and it would be nice if there was a way to reference the axis, other than lineing up 2 marks.
>
> Thanks again Tom,
> Troy
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi Troy,
> >  
> > That is all correct.  The A+ and B+ signals would be connected to IO0 and IO1 signals (Pins 7 and 8 on JP7) for encoder input channel 0.
> >  
> > You might also consider adding termination resistors of ~120 ohms between each signal (A+ and B+) to ground.   This will reduce signal ringing and noise that might be picked up on long cables.  Also consider using shielded cables where the shield is connected to KFLOP DC Ground near the KFLOP end of the cable.
> >  
> > The Index signals are not required to be connected.  An Index signal can be useful in improving the accuracy of homing.  The Home routine can be written to move until a switch is connected and then move until the Index pulse is detected.  Because this is all done in a User C Program (software) any spare input can be used.
> >  
> > HTH
> > TK 
> >
> > From: tmday7 <brotroy7@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Wednesday, July 4, 2012 4:46 AM
> > Subject: [DynoMotion] Re: Absolute or Incremental
> >
> >
> >  
> > Hmm,ok. So if i have a differential encoder that has following pins, this is how i would use wires with KFLOP?
> >
> > Pin1:Ground (Both pins 1&2 to a digital ground at header JP7)
> > Pin2:Ground
> > Pin3:Index- (Leave off or to an input?)
> > Pin4:Index+ (Leave off or to an input?)
> > Pin5:A- channel (Leave off?)
> > Pin6:A+ channel (To Input on header JP7)
> > Pin7:+5V Power (Both pins 7&8 to +5V pin on JP7)
> > Pin8:+5V Power
> > Pin9:B- channel (Leave Off?)
> > Pin10:B+ channel (To Input on header JP7)
> >
> > Thanks again,
> > Troy
> >
> > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes wrote:
> > >
> > > Hi Troy,
> > >  
> > > No KFLOP itself does not have any differential encoder inputs (LV (low voltage) differential is something completely different).  Only single ended encoder inputs are available on KFLOP.  I recommended getting differential encoders because differential encoders can be connected to either single ended inputs or differential inputs.  For single ended inputs just connect one of the signals (either + or -) and leave the other unconnected.  Because encoder signals are handled in hardware they have dedicated pins.  The exception to this is an MPG encoder.  Those are often slow enough that they can be handled in software so can be connected to any KFLOP inputs.  See also
> > >  
> > > http://tech.groups.yahoo.com/group/DynoMotion/message/5345
> > >  
> > > http://tech.groups.yahoo.com/group/DynoMotion/message/5086
> > >  
> > > Regards
> > > TK
> > >  
> > >
> > > From: tmday7
> > > To: mailto:DynoMotion%40yahoogroups.com
> > > Sent: Tuesday, July 3, 2012 7:23 PM
> > > Subject: [DynoMotion] Re: Absolute or Incremental
> > >
> > >
> > >  
> > > Tom,
> > > Is the JP5 - GPIO #1 / LV Differential Connector on the KFLOP board the only place to wire in a differential encoder?
> > > Or can any Gen Purpose LVTTL I/O (5V Tolerant)pin be used for differential encoder channels?
> > >
> > > Thanks,
> > > Troy
> > >
> > > > --- In mailto:DynoMotion%40yahoogroups.com, Michael
> > > > <mrosenfield@> wrote:
> > > > >
> > > > >
> > > > > That is correct. See http://usdigital.com/products/cables-connectors/cables/10-pin/CA-FC10L-SH-NCI guess I got it backwards - Avago is now Agilent, which used to be HP.
> > > > Michael
> > > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > >
> > > >
> > > > > So it still works as any other Differential, its just Avago (HP) made a type of "proprietary" pinout connection?
> > > > >
> > > > >
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Troy
> > > > >
> > > > >
> > > > >
> > > > > --- In mailto:DynoMotion%40yahoogroups.com, Michael Rosenfield <mrosenfield@> wrote:
> > > > >
> > > > > >
> > > > >
> > > > > >
> > > > >
> > > > > > Yes, that is what it is. Avago used to be HP. You can find the pinouts on the USDigital website, too. They make encoders and line drivers/receivers, and they are available Avago compatible.Michael Rosenfield
> > > > >
> > > > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > >
> > > > > > From: tk@
> > > > >
> > > > > > Date: Tue, 3 Jul 2012 12:57:26 -0700
> > > > >
> > > > > > Subject: Re: [DynoMotion] Re: Absolute or Incremental
> > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > >
> > > > > > I think that may be the pinout and connector type, but I'm not sure.
> > > > >
> > > > > >
> > > > >
> > > > > > TK
> > > > >
> > > > > >
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> > > > >
> > > > > > From: tmday7 <brotroy7@>
> > > > >
> > > > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > >
> > > > > > Sent: Tuesday, July 3, 2012 10:51 AM
> > > > >
> > > > > > Subject: [DynoMotion] Re: Absolute or Incremental
> > > > >
> > > > > >
> > > > >
> > > > > >
> > > > >
> > > > > >
> > > > >
> > > > > >
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> > > > >
> > > > > > Ok, thanks Tom. Do you know what is a Avago Compatible Differential?
> > > > >
> > > > > >
> > > > >
> > > > > > Troy
> > > > >
> > > > > >
> > > > >
> > > > > > --- In mailto:DynoMotion%40yahoogroups.com, TK <tk@> wrote:
> > > > >
> > > > > > >
> > > > >
> > > > > > > Incremental with differential outputs.
> > > > >
> > > > > > >
> > > > >
> > > > > > > TK
> > > > >
> > > > > > >
> > > > >
> > > > > > > On Jul 3, 2012, at 9:16 AM, "tmday7" <brotroy7@> wrote:
> > > > >
> > > > > > >
> > > > >
> > > > > > > > Tom,
> > > > >
> > > > > > > > Which type of encoder do you prefer for KFLOP? Absolute or Incremental?
> > > > >
> > > > > > > > Or is there more to it than that?
> > > > >
> > > > > > > >
> > > > >
> > > > > > > > Thanks,
> > > > >
> > > > > > > > Troy
> > > > >
> > > > > > > >
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> >
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