What about using some chips like these for the TC interface and then tie these into a Pokeys via the Pokeys analog inputs.
http://www.analog.com/static/imported-files/data_sheets/AD594_595.pdf If you use EMC2 and keep the Gcode interface you could sell it as the ideal programmable smoker for CNC machinists!! ;-) Dave On 12/21/2010 2:46 AM, Dave wrote: > That is some sophisticated smoker control.. :-) > > Seems to me that the hard part is getting the thermocouple inputs into > the PC without going bankrupt. > > Did you see this ?? > > http://www.circuitcellar.com/library/print/0503/moyer154/3.htm > > Perhaps something like this but instead tied an Arduino or a Pokeys > which is then tied to your PC via USB? > > Dave > > > On 12/20/2010 5:33 PM, John Thornton wrote: > >> Jon, >> >> It's not just a simple temperature control... It needs some smarts, >> that's why ATM I'm using a PLC with a dual thermocouple input and a >> touch screen to and several SSR's perform the tasks. I need two or more >> temperature probes (thermocouples not thermisters) one controls the >> cabinet temperature via the recipe or the conditions I have set up and >> one or more monitors the internal temperature of the food and the >> "smart" part figures out what to do based on the recipe and the current >> temperatures. >> >> What I want to do is move the "smarts" from the PLC to a PC as everyone >> seems to have a laptop laying about somewhere and I don't know many >> people that even know what PLC means. >> >> One recipe might look like this >> Cabinet temperature 120F, Circulation Fan On, Vent 100% open time 1:45 >> add smoke generator heat time 0:20 >> close vent to 50% >> ramp cabinet temperature from 120F to 145F over a 2 hour period >> smoke generator off >> cabinet temperature 160F until internal temperature reaches 145F >> >> >> Thanks >> John >> >> Jon Elson wrote: >> >> >>> Dave wrote: >>> >>> >>> >>>> Depends on what you want to do. If John wants to run some type of >>>> temperature vs time profile then something smart makes sense. >>>> >>>> >>>> >>>> >>>> >>> In that case, buy a ramp-and-soak temperature programmer on eBay, and >>> add a thermocouple and a power solid state relay. I did this for the >>> toaster oven I use to reflow solder circuit boards. It cost less than a >>> data acquisition board. >>> >>> Jon >>> >>> ------------------------------------------------------------------------------ >>> Lotusphere 2011 >>> Register now for Lotusphere 2011 and learn how >>> to connect the dots, take your collaborative environment >>> to the next level, and enter the era of Social Business. >>> http://p.sf.net/sfu/lotusphere-d2d >>> _______________________________________________ >>> Emc-developers mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/emc-developers >>> >>> >>> >> ------------------------------------------------------------------------------ >> Lotusphere 2011 >> Register now for Lotusphere 2011 and learn how >> to connect the dots, take your collaborative environment >> to the next level, and enter the era of Social Business. >> http://p.sf.net/sfu/lotusphere-d2d >> _______________________________________________ >> Emc-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-developers >> >> >> > > ------------------------------------------------------------------------------ > Lotusphere 2011 > Register now for Lotusphere 2011 and learn how > to connect the dots, take your collaborative environment > to the next level, and enter the era of Social Business. > http://p.sf.net/sfu/lotusphere-d2d > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > > ------------------------------------------------------------------------------ Lotusphere 2011 Register now for Lotusphere 2011 and learn how to connect the dots, take your collaborative environment to the next level, and enter the era of Social Business. http://p.sf.net/sfu/lotusphere-d2d _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
