Spectrom - Turn Any 3D printer In Multi Color Printer

[Feign]

I believe he means a tube between the spectrom machine and your extruder weather or not the extruder has a tube after it. You'll notice that both the machines the Spectrom was tested on use direct extruders rather than Bowden tubes.

If you do have a significant distance between the extruder and the hot end (such as a Bowden tube), then the machine has to account for that extra length, I assume with some calibration process..

[Spectrom3D]

I believe he means a tube between the spectrom machine and your extruder weather or not the extruder has a tube after it. You'll notice that both the machines the Spectrom was tested on use direct extruders rather than Bowden tubes.

If you do have a significant distance between the extruder and the hot end (such as a Bowden tube), then the machine has to account for that extra length, I assume with some calibration process..

Exactly.

Also, yes, we are currently using 1.75mm PLA in our development.

[curious aardvark]

I believe he means a tube between the spectrom machine and your extruder weather or not the extruder has a tube after it. You'll notice that both the machines the Spectrom was tested on use direct extruders rather than Bowden tubes.

If you do have a significant distance between the extruder and the hot end (such as a Bowden tube), then the machine has to account for that extra length, I assume with some calibration process..

ultimakers are bowden - always have been.
Also 3mm :-)
Hence the questions.