Gene Heskett wrote: > On Saturday 04 August 2007, Jon Elson wrote: >>The rotary coils are your resolver. Your resolver should be >>built at the factory so there is no need for diddling. > I'm pretty sure the 2S1200 needs no coils > > Maybe, maybe not. I have wound coils before, and it would be a learning > experience. > But, you are going to spend the rest of your life trying to make a resolver that works as well as a commercial one. That doesn't make sense. I have looked at both the chip and the eval board data sheets, and the only inductors I see are some simple filter inductors on the power supply nets. > >>>Then the question is, can emc2 interface, via a separate parport, the >>>rather copious amount of data this thing can produce on demand, and make >>>use of it at usable spindle speeds? That would appear to be easier on the >>>software than trying to use the quadrature signals since their rep rate >>>can get well into the megahertz range, pushing the interrupts right over >>>the edge. >> >>Yes, you skip the absolute output and just use the A and B >>outputs that look just line an encoder. Don't try to interface >>something like this in software. Use a hardware encoder >>counter. You'd never use the quadrature signal to cause interrupts. > > > Another accessory board? Whose would you suggest? And which .ini file? >
Umm, well, you could use my universal PWM Controller board. It has quadrature counters and PWM generators for servo amps for up to 4 axes, and digital inputs and outputs, too. See http://jelinux.pico-systems.com/univpwm.html for more info on it. There are other choices, too. But, this replaces just about everything else you would need, such as breakout boards, SSR mounting panels, cables, etc. A similar product is the Universal Stepper Controller, for any servo or stepper drive that takes step and direction pulses. For old versions such as EMC1 and BDI, suitable .ini files are on my web page. For all EMC2 versions, they are part of the list of configs directories that come with the EMC2 distribution. Specifically, univpwm for the PWM controller, and univstep for the stepper controller. I have some other versions that support the spindle DAC option, spindle-synced threading and such. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
