Well I think Ive got it now. The new Direct-DualExtrusion-X-Carriage for my Printer. What do you think? The carriage is essencially the same now but with an e3d v6 and a geared nema17 right now. Any suggestions?
That’s going to be one heavy carriage.
@Mark_Rehorst @Greg_Nutt
Thats why Ive asked of how much torque is needed in a previous thread. Most of the people claimed that 16Ncm would be too weak. No ive got two 36Ncm 0.9° Nema17. Yes this will be about 0.5kg. But Ive seen some dualextrusionsystems this big. Hope this works well…
@ Mark: The yellow ball shaped thing is the coupler for all wires. Worked out well for the old carriage but Iam concerned about double the wires. Need to rethink/redesign it to be bigger.
In my 2 in 1 extruder I use NEMA 14 steppers with 5Ncm and 4-1 gearing which gives 20 Ncm minus a little effect losses in the beltdrive and it works great. Printing 100mm / s with 1mm nozzle and 0.6 layers.
@Jan_erik_Halvorsen well seems great. but using a smaller nozzle makes it harder. At least thats my experience 
@VolksTrieb Yes you are right about that. I have not tried smaller than 0.35 mm nozzle with this extruder and it worked well.
@Jan_erik_Halvorsen
Ok. e3d Titan uses a 40Ncm Nema17 with 3:1 gear reduction! Dont know what to believe xD
Tom indicated in his review that a much smaller pancake NEMA17 will work just fine with the Titan. Officially, I don’t know, but he said it worked fine for him.
@Greg_Nutt
Gotta watch it again then Thx!
It’s probably more because of price. pancake steppers are twice as expensive as a regular NEMA 17.
NOPE. They are cheaper ;D
So @Thomas_Sanladerer what is your experience/suggestion on how big a 1.75mm directdrive extruder motor without gearing should be?
40Ncm should be enough. I’ve printed a lot with that using 0.3 nozzle on a Witbox, mostly ColorFabb XT-CF20 carbon material. Also used 13Ncm pancake steppers with Titan extruder (which got the stepper up to 90C until I changed the idler to a ballraced one. BUt now it’s OK)
The Witbox is a fully enclosed design, with the case fans disabled on mine, so it’s much harder on the steppers than open design printers.
Also If it’s not too late I’d suggest to use Hexagon A0 instead E3d V6. It’s a better design, better quality, better print quality and the same or a bit lower price tag.
@VolksTrieb That is not a pancake stepper it is a regular NEMA 17.
@Jan_erik_Halvorsen
The weight is the critical factor here
This stepper motor I would like to try.
http://www.omc-stepperonline.com/9deg-thin-stepper-motor-125mm-05a-7ncm10ozin-14hr050504s-p-88.html
@Jan_erik_Halvorsen
Nice thing but 7Ncm lol I can stop it at the shaft with my fingers ;D
it is stronger than the one I use now.
Link
http://www.banggood.com/2-Phase-4-Wire-35-Stepper-Motor-0_9-degree-20mm-3D-printer-Stepping-Motor-p-1042693.html
@Jan_erik_Halvorsen
for what?