Originally shared by Björn Marl
https://www.youtube.com/watch?v=wf0lRwz0y9U&feature=autoshare
Hi, could you please explain what is we’re looking at? Thank you
Dual, independent extruders.
Very sweet dual extruder setup!!
1 stepper motor (17, 19, 23?).
@ioan_dascalescu For in depth questions please get with @Bjorn_Marl Marl… But this is like @Christopher_Gaul said, a dual EXTRUDER(s) setup.
I think this is the type of growth that it’ll take for 3d printing to really make the move into the home. This way of multiple material/colors/whatever is capable of removing many of the issues that currently exist with “common” dual extrudes setup (even though there isn’t that big of an issue with any of the current methods).
Nice one. Nice m/c
I like this!
@ioan_dascalescu Sorry for the late reply.As @Jason_Ray pointed out, the main thing are the independent X Carriages. They allow for completely independent extruders. The big plus for me is that if you mix different materials, like FPE or Ninjaflex and ABS, you don’t have to wait for one hotend to cool and the other to heat up before you can continue to print. Most elastic material will just run out of a hot nozzle when not in use. With this setup you can park the unused hotend in a safe position and keep it hot. Another advantage is the low moving mass of each carriage. it allows for high acceleration and good precision.
For the X Axis i use two Nema 14 0.9° stepper, for Y and Z NEMA 17 0.9°.
The two sides of the X bridge are identical, you can rotate the complete axis if you want. The whole design is pretty< modular so you can easily adjust it for different rods or different endstops. Even a complete exchange of the X setup isn’t very difficult, the mounts for it on Z are pretty simple.
@Bjorn_Marl Thank you for your time. I like this setup and it’s advantages, clever idea. Any more pics with the hole m/c? Please.
There is some more on the Hack FFM WIKI http://www.hackerspace-ffm.de/wiki/index.php?title=Community_3d-Drucker_2.0
I just did some major additions to the X carriages and will try to post stuff later today. If i can make it i would love to see this machine print in 2014 
Thanks and good luck.