Hi,
I am trying to configure a dual extruder / dual heater / single carriage printer.
On DWC heater control is ok, I am able to control each heaters individually, but not "Extrusion control". I can control one of the extruders, but not the other.
What am I missing?

Config.g:

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"bobo" ; set printer name

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0 S0 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes backwards
M569 P3 S1 ; physical drive 3 goes backwards
M569 P4 S1 ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E3:4 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
M92 X80.00 Y76.824 Z640.00 E690.00:690.00 ; set steps per mm
M566 X900.00 Y900.00 Z840.00 E600.00:600.00 ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z900.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z10.00 E10000.00:1000.00 ; set accelerations (mm/s^2)
M906 X1400 Y2000 Z2000 E850:850 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X000 Y0 Z0 S1 ; set axis minima
M208 X500 Y500 Z450 S0 ; set axis maxima

; Endstops
M574 X2 S1 P"!xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin !xstop
M574 Y1 S1 P"!ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin !ystop
M574 Z1 S2 P"^zprobe.in" ; configure Z-probe endstop for low end on Z

; Z-Probe
M558 P9 C"zprobe.in" H5 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds
G31 X30 Y-3 Z2.75 P25 ; increase Z makes the head go lower
M557 X30:490 Y30:490 S92:92 ; define mesh grid

; Heaters
M140 H-1 ; disable heated bed (overrides default heater mapping)
M308 S0 P"e0temp" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin e0temp
M950 H0 C"e0heat" T0 ; create nozzle heater output on e0heat and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H0 S280 ; set temperature limit for heater 0 to 280C
M308 S1 P"e1temp" Y"thermistor" T100000 B3950 ; configure sensor 1 as thermistor on pin e1temp
M950 H1 C"e1heat" T1 ; create nozzle heater output on e1heat and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S1 H0 T45 ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"fan2" Q500 ; create fan 2 on pin fan2 and set its frequency
M106 P2 S1 H-1 ; set fan 2 value. Thermostatic control is turned off

; Tools
M563 P0 D0 H0 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H1 F1 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C
; Custom settings

; Miscellaneous
;T0
T1
; select first tool
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss