Post by thread:[PIC]: [OT]:Quadrature decoding

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

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