On 6/4/2012 7:20 AM, Ed Nisley wrote: > The slicing software can produce different extrusion temperatures for > different layers (or classes of layers), so the printer needs > programmatic control over*everything*.
I did not know that. Some PID controllers (maybe some cheap ones??) have Modbus interfaces which could be tied into Classic Ladder so you could change setpoints on the fly. The I/O is the price issue for analog control. If you do thermocouples, you need cold junction compensation which adds to the complexity. RTDs don't need that but they are a lot more expensive. I believe that normal thermistors (RTDs are part of the same family-but much more linear over a temp range) tend to be non linear. If anyone has a cheap way to do effective - accurate temperature measurement - on the cheap, I'd like to know about it. :-) Dave ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
