Searching \ for '[PIC]: [OT]:Quadrature decoding' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/ios.htm?key=quadrature
Search entire site for: '[OT]:Quadrature decoding'.

Exact match. Not showing close matches.
PICList Thread
'[PIC]: [OT]:Quadrature decoding'
2000\07\25@144822 by Randy A.

picon face
It isn't very hard to write the code but I have had some problems with the
Microcontroller reading the code unless it is dedicated to that task alone.
However I have found that using a custom IC just for the decoding and putting
it into a Microcontroller/Microprocessor controlled system it is possible to
decode the signals.  Again tho, at the higher optical dick resolutions some
pulses tend to get dropped.  I have concluded that a dedicated
Microcontroller is best and then interface it with the main system.  That is
pretty much what a commercial PLC does such as an Allen-Bradley or Omron or
GE-Fanuc etc.  They have axis counting modules that are quite expensive for
this purpose and I know why since they are pretty much a stand alone module
that is a virtual dedicated controller for this.

Randy

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements

2000\07\25@165246 by Reginald Neale

flavicon
face
   Randy said:

>It isn't very hard to write the code but I have had some problems with the
>Microcontroller reading the code unless it is dedicated to that task alone.
>However I have found that using a custom IC just for the decoding and putting
>it into a Microcontroller/Microprocessor controlled system it is possible to
>decode the signals.  Again tho, at the higher optical dick resolutions some
>pulses tend to get dropped.  I have concluded that a dedicated
>Microcontroller is best and then interface it with the main system.  That is
>pretty much what a commercial PLC does such as an Allen-Bradley or Omron or
>GE-Fanuc etc.  They have axis counting modules that are quite expensive for
>this purpose and I know why since they are pretty much a stand alone module
>that is a virtual dedicated controller for this.


   HP makes some dedicated chips to do this: HCTL20XX series.
   See http://www.semiconductor.agilent.com/motion/hctl2000.html

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements

More... (looser matching)
- Last day of these posts
- In 2000 , 2001 only
- Today
- New search...