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Re: Heatbed output 0Volts

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yes.

**
* "Mixing Extruder"
* - Adds a new code, M165, to set the current mix factors.
* - Extends the stepping routines to move multiple steppers in proportion to the mix.
* - Optional support for Repetier Firmware M163, M164, and virtual extruder.
* - This implementation supports only a single extruder.
* - Enable DIRECT_MIXING_IN_G1 for Pia Taubert's reference implementation
*/
#define MIXING_EXTRUDER
#if ENABLED(MIXING_EXTRUDER)
#define MIXING_STEPPERS 3 // Number of steppers in your mixing extruder
#define MIXING_VIRTUAL_TOOLS 16 // Use the Virtual Tool method with M163 and M164
//#define DIRECT_MIXING_IN_G1 // Allow ABCDHI mix factors in G1 movement commands
#endif

But I suspect your going to be disappointed..

The diamond is deigned for mixing not really for selecting 1 of 3 filaments.

Since all 3 filaments are in the hot zone, if you don't keep moving them all, then the ones that are not moving tend to get clogged. This is my experience anyways...

NB you always have to have 3 filaments loaded. If you don't when you try and extrude it will extrude from any opening, include any non used inputs. This will make a hell of a mess and take many hours to clean up...

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