On Mon, 2012-06-11 at 22:07 -0600, Jeshua Lacock wrote: > it supports two extruders
It has only one thermocouple input, so I'm not sure how you'd control the second extruder head temperature. Being an Arduino, it does have half a dozen analog inputs for thermistors. I don't know whether the stock firmware supports more than one input for the build platform temperature. > the 2nd link you provided fixes that issue? Alas, not at all. Beefing up the traces reduces the power loss on the board and eliminates some of the glitching. It's apparently one of those weird firmware issues that's ascribed to a myriad causes. All I know is that after improving everything, non-MBI firmware on the Motherboard still occasionally kvetches about the extruder controller being nonresponsive. It recovers, though, which suggests the EC firmware gazes into its own navel for a while. The power MOSFETs could be driven by three parallel port pins and a dab of HAL code. Hand-wiring transistors on a protoboard would actually give you enough copper to handle the current. There's been some work on reading analog values from various microcontrollers into HAL through USB. That'd be the hard part of the job, as the MAX6675 seems to be obsolescent, but hand-rolling another thermocouple input is required for a second extruder head, anyway. Note that the EC is "out of stock", which seems to be the fate of backlevel electronics everywhere. Good luck ... -- Ed http://softsolder.com ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
