How many Extruders possible on a RepRap?

[BurnItDownBaby]

What's the most extruders that anyone has jammed into a RepRap? I'm now strongly considering building one. Is it possible to build a monster of a printer with a ton of Extruders? I'm very unfamiliar with RepRaps, so please forgive me.

I know it's probably possible to have 4 extruders. Can you have more than that?

[KDog]

It seem to me that there isn't any physical limit. Probably is a practical limit though. There are a few four nozzle extruders coming to the market now. Not sure how they work but might give you some ideas. The Kraken (http://e3d-online.com/The-Kraken) is a bowden fed four nozzle hot end. I guess you could put two of them on a reprap fairly easily to get eight different colors.

[NJ_Lifer]

I honestly don't see a need for more than 4 extruders (at least not yet with current technology).

[BlackDragon]

Part of it depends on your electronics. The current RAMPS board (1.4) has hookups for two extruders. I'm not sure about other controllers.

If you're handy as circuit work, you *could* add more extruder controllers. Then, you'd have to modify your code for extruder selection and offsets.

I agree with NJ. There really isn't a practical need for more than three or four heads.

[KDog]

I think that the Azteeg x3 controller will do four extruders now. Personally, I've never felt the need for more than one extruder but I can also see the cool factor in having more.

[ronnytedeski]

I like the idea of 4 extruders, but never really have a need for them. Why would you want more than 4? I don't really see any reasonable explanation.