Hello Kirk, last week, I made a little circuit board using the HCTL 2032 and an ATMega 32 for a DRO unit (4 axis). It has not been tested yet. I am not using the index track of the encoders. But, as far as I understand the technical data sheet, the index pulse is not available as an output. It can only be used to reset the X and Y axis counters after one turn of the encoder. This makes it useful as an angle indicator.
If you want to use the index pulse externally, it would be easy to attach a CMOS or TTL chip to bypass the HCTL 2032 and obtain the angle information without resetting the XY counters. Best regards Peter Blodow Kirk Wallace schrieb: > On Mon, 2010-12-20 at 13:34 -0800, Kirk Wallace wrote: > >> On Mon, 2010-12-20 at 15:11 -0600, Jeff Epler wrote: >> >>> My first impression is that there is no "an index occurred" output, so I >>> don't see how you would make it work with emc's index-enable model for >>> threading and home-to-index. >>> >>> Jeff >>> >> A brief look doesn't indicate (to me) what it uses the index for (reset >> the internal counter?). My first guess is that I would leave it >> unconnected and route the index to EMC2 on another path. The index >> question seems to be the only deal breaker. >> > > It appears that is what the index does, it resets the X and Y counters. > I am realizing that this isn't as simple as I assumed going into it. I > assumed that "somehow" I would convert the counter data into pulses then > feed that to EMC2. My next guess is that I should figure out how the > EMC2 position counters work and see if I can amputate them at a > strategic point and insert my hardware counter, moua ha ha ha. But I'll > need to have an index enable pin to control the HWcounters index? I need > to do some reading. > ------------------------------------------------------------------------------ Forrester recently released a report on the Return on Investment (ROI) of Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even within 7 months. Over 3 million businesses have gone Google with Google Apps: an online email calendar, and document program that's accessible from your browser. Read the Forrester report: http://p.sf.net/sfu/googleapps-sfnew _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
