Has anyone looked at how the prusa multi material mux works?
This is the best image I have so far found of it
I'm looking for details. Yes I want to build my own, as far as I can tell no details are public.
The principle of how it works is simple enough
The e0 stepper wires (yes after the stepper driver) are muxed by 3 control lines to e0 threw e3 extruder steppers motors
From the firmware the control signals are
default 1 2 3
E_MUX0_PIN low high low high
E_MUX1_PIN low low high high
E_MUX2_PIN low low low low
So from this we can see is a binary sequence and potentially there is room for another 4 extruders
From the image we can see a what is probbaly a 1-of-8 decoder but any idea's on what they use to actuly switch the lines?
Would need to be stepper voltages... 12v , does it do 24v?
Im also fairly sure the 4 pin chips are opto isolation
Anyone know anything? (I only started looking about an hour ago)
Edited 2 time(s). Last edit at 08/21/2017 11:33PM by Dust.