> > The hardware plan... > > I'll start with a stock Makergear M2, which seems to be the most solid > and well-designed DIY printer currently available. I'd prefer an > enclosure to stabilize the ambient temperature, but that's basically a > big box. > > Once the stock M2 works well enough, replace its RAMBo controller with > Mesa 5i25 + 7i76. > > The 7i76 has enough robust digital outputs to drive SSRs for heaters and > whatnot, with HAL components closing the temperature loops. The thermal > time constants seem long enough to not require high-frequency PWM > proportional control, which should simplify things. > > It also has sufficient digital inputs for home switches, probe contacts, > and stuff like that. > > However, the printer controller also needs multi-channel thermocouple > inputs, because thermistors seem underqualified for long-term > measurements at 200+ C. I'd like to use a Mesa 7i87 for analog input, > but it appears unsupported by the HostMot2 driver: > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Mesa_Cards >
The 7i73 card pendant card has up to 8 0-3.3v analog inputs. For about $50 it can be added to the 5i25/7i76 combo I was sure one of the other cars could sense analog as well - Peter will surely pipe up. or I see in the wiki someone added a USB themometer: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ContributedComponents#USB_thermometer_Microdia_TEMPer1V1_2 It's apparently about $15 on the internet: http://pcsensor.com/index.php?_a=viewProd&productId=7 http://www.pitt-pladdy.com/blog/_20110824-191017_0100_TEMPer_under_Linux_perl_with_Cacti/ I would love to see linuxcnc's horizons be broadened. It would be nice to such up some more talented people from other projects. Good luck! Chris M ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122412 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
