On Tuesday 05 June 2012 02:28:48 Jeshua Lacock wrote: > Personally what I would like to see is: > > • Compatible with existing popular slicing software, filtering with a script > is acceptable (but of course not ideal), for instance using the python script > at: > http://www.thingiverse.com/thing:5233 Yes, but in the long run the scripts functionality is integrated into the slicing software.
> • Compatible with "off the shelf" components such as MakerBots newest > extruder the MK7: My setup for 3mm wire is similar: http://dl.dropbox.com/u/18713924/IMG_3032.JPG You see the stepper and the driver board connected to the parallel port. Notice the changed position of the temperature sensor near to the nozzle. This effects measurement accuracy. The motor axis has a second axis end for mounting a encoder (not visible). The flat front face is for a cpu-cooler (maybe with a peltier in between). I am wondering this reprap wire feeders are running without any monitoring: my suggestion is a encoder driven by the wire. My summary of electronics needed: • Stepper driver (nothing to do, use lcnc usual parts, movement is lcnc driven!) • Encoder interface (maybe 2x, nothing to do) • 3x temperatur measurement, 12bit resolution (2x nozzle, 1x feader housing) • 3x pwm (nozzle, peltier, fan) My suggestion: something like pmod's: http://www.digilentinc.com/Products/Catalog.cfm?NavPath=2,401&Cat=9 and a avr/arm board with eth. You use what you need (price/accuracy). For cheap temperature measurement with 1n4148 up to 400 °C see Bild2 from: http://thomaspfeifer.net/laminator_temperatur_regelung.htm > • And their controller card. If we could eliminate the card with standard CNC > hardware, that works too. But this card looks like it essentially just > controls the power of the extruder heater. > http://store.makerbot.com/extruder-controller-v3-6.html This controller does not fullfill all my requierements. But have thermocouple support. But this is only an advantage, if you use a better ad converter. > Note the CNC conversion at: > http://www.thingiverse.com/thing:5233 I am working on a very similar setup. Have you seen a extruder with MK2-M10 taper? And the electronic board has 2 connectors: power and eth. Easy to change. > I am not sure how the slicing software handles the extruder stepper motor, > but I would guess it is with G Code. http://www.reprap.org/wiki/EmcRepStrap My suggestion: we change the postprocessor of the slicing software to fit lcnc gcode requirements. > • Multiple extruder support would be great too, either for increased print > speeds and/or different material. That of course can come later. You can use multiple boards of the above described type or use more pmod's. My suggestion is to use a pcb board mechanically attached to the extruder with a cpu and eth/rs232. Alternatives to avr based boards are: - Raspberry Pi - OLINUXINO (https://github.com/OLIMEX/OLINUXINO from http://www.olimex.com/dev/index.html) - ? Cpu power is sufficient to run termperature controll. Cheers, Joachim ------------------------------------------------------------------------------ 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
