@button said in Dual motor extruder with 1 nozzle:
@deckingman
I was thinking about loosing sync between both motors and eg. building pressure in bowden tube because one motor will be going faster (steps set correctly)
Well for sure, if you set different steps per mm for each extruder, then bad things are going to happen. But if the steps per mm are set correctly for each extruder, and there is no extruder slippage, then you shouldn't have a problem.
In your opening post you asked the question " Is the Duet 2 WiFi powerful enough to run 2 extruder motors simultaneously...." and the answer is yes. But if you don't set the extruders up properly, so that they both feed at exactly the same rate, then you will have problems - that's a mechanical or tuning issue. From a Duet perspective, both the firmware and hardware are capable of doing what you want to do. But there is no easy way to compensate for mechanical or tuning errors that you might introduce when setting it up.