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I was wondering if is possible to send printing using the software MACH3 for CNC since this software can handle up to 3 axes: X,Y,Z,A,B and C. Of course the CNC needs an extra control for temperature which I already have it; My CNC handle a Z axis with 150mm height, so I could print higher parts than normal CNC.

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Well, few years ago I could set the software Mach3 for printing doing the next:

  1. Set a profile for 3D printing for the faster movements that your CNC can support; for example some CNC uses standard threads, others ACME threads and other GT2 belts like the 3D printers. If we try to use a feed rate too high the motors will shake. For this profile is not needed the torque for machining or routing, so we will sacrifice force to gain speed.
  2. Create the proper gcode. Mostly Gcode maker generate the code to send pulses to Extruder E but Mach3 takes as invalid E instructions, so the extruder will never move. To avoid this there are 2 modes:

a) Find and replace all E instruction with A to enable Motor A or

b) Create the Gcode with an interpreter to output A instead E like Slicer 0.71 as you can see in the image below. I haven't tried with other software

enter image description here

3.For controlling the extruder temperature is possible with any other controller like REX-C100/C400 any PIC or Arduino. The accuracy will depend on your design.

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