Best posts made by jsinicro

so if I wanted to buy an industrial duet 3 printer any suggestions?

@o_lampe There are 2 motors on each z axis and 1 motor on each Y axis I actually got this to work as fine as homing and moving correctly. I found a way to home both Z axis by adding the commands to the homez.g. What it does is first map the first Z axis with the first 2 motors then it remaps the 2nd Z axis with the other 2 motors and after it's done it combines all the motors into one Z axis motor.

It would be my goal to have both tools to extrude simultaneously on the same part so that basically it would cut the print time in 1/2. The chassis that I need to build for autonomous vehicle is divided into 3 parts and 2 of these parts took about 4 days to print -this was on a printer I bought but was very disappointed with it. I then decided to build my own.

@nurgelrot to test it I cut the filament, activate and heat up the hot end, and then extrude till all filament runs out. which should pop up the message. I am using RRF3.3RC2.

@fcwilt Yes, both X axis can travel the full length of the Y axis bed. Currently I am focusing on getting one tower at a time to generate a relative good print, then I will try to get the other tower to do the same with different filament.

@fcwilt There can only be one independent Z axis at a time, that's why I switch the motor config to go to one or another. Would be sweet if two independent Z and X axis could work at the same time on the same print, thus cutting the print time in 1/2.

@fcwilt The macro switches between the two or joins them back:
Left Tower:

;

; switchLeftTower.g
; called to home the Z axis
;
G91
;M18 X Z                                ; disable Z motors before reassigning them                                 
;M350 X16 Z16 I1                        ; Z reassign microstepping
;M906 X800 Z800 I30                     ; Z reassing currents (mA) and motor idle factor in per cent
;T0 P0                                  ; Select Tool 1 and run tfree0 only to park T0

;home X first
;G1 H2 Z1 F6000     ; lift Z relative to current position
;G1 H1 X-685 F1100  ; move quickly to X axis endstop and stop there (first pass)
;G1 H2 X10 F6000    ; go back a few mm
;G1 H1 X-685 F360   ; move slowly to X axis endstop once more (second pass)
;G1 H2 X10 F6000  

;G1 H2 Z1 F6000    ; lift Z relative to current position
;G1 H1 Y-705 F1100 ; move quickly to Y axis endstop and stop there (first pass)
;G1 H2 Y5 F6000    ; go back a few mm
;G1 H1 Y-705 F360  ; move slowly to Y axis endstop once more (second pass)
;G1 H2 Y5 F6000    ; go back a few mm

M584 Z0.1:0.4                   ; Split the 2 Z towers for independent control. this will move right tower only

G1 H1 X0 Y250 Z1 F6000          ; lift Z relative to current position
G30 K0                          ; this will home and probe the left Z tower

G90

Right Tower
;
; switchToRightTower.g
; called to home the Z axis
;
G91
;M18 X Z                              ; disable Z motors before reassigning them
;M350 X16 Z16 I1                      ; Z reassign microstepping
;M906 X800 Z800 I30                   ; Z reassing currents (mA) and motor idle factor in per cent
;T0 P0                                ; Select Tool 1 and run tfree0 only to park T0

;home X first
;G1 H2 Z1 F6000     ; lift Z relative to current position
;G1 H1 U-685 F1100  ; move quickly to X axis endstop and stop there (first pass)
;G1 H2 U10 F6000    ; go back a few mm
;G1 H1 U-685 F360   ; move slowly to X axis endstop once more (second pass)
;G1 H2 U10 F6000  

;G1 H2 Z1 F6000    ; lift Z relative to current position
;G1 H1 Y-705 F1100 ; move quickly to Y axis endstop and stop there (first pass)
;G1 H2 Y5 F6000    ; go back a few mm
;G1 H1 Y-705 F360  ; move slowly to Y axis endstop once more (second pass)
;G1 H2 Y5 F6000    ; go back a few mm

M584 Z0.0:0.5                   ; Split the 2 Z towers for independent control. this will move right tower only

G1 H1 U0 Y250 Z1 F6000          ; lift Z relative to current position
G30 K1                          ; this will home and probe the left Z tower

G90