RetractionTowerProcessor

Generate retraction test towers by varying retraction by z in G-code.

This is Poikilos' Python fork of logiclrd's C# tool (RetractionTestTowersGCodeGenerator).

Sourcecode: https://github.com/poikilos/RetractionTowerProcessor

You can calibrate further using my related projects:

• TemperatureTowerProcessor
• LinearAdvanceTowerGenerator

Differences in Poikilos' Python fork

• Change to a new more stable tower to facilitate many levels.
  • The base is still 25x10x2 (but not for the "arches" version--see Alternate towers).

Measurements

Cura

Cura places it at the center and changes the origin to the center. Therefore:

• To center the corner, set the position to 12.5,5
• To move the corner of a model to a given point:
  • Place the corner at 0,0 by subtracting 102.5,102.5 (or whatever is half of your bed size) from the numbers above but flip the sign of y afterward (in this case, set the coords to -90,97.5)
    • For CR-10, subtract 150,150 then flip y resulting in -137.5,145
  • Now take that position and add the position you want. For testing purposes only (or if you have a very large bed) to match the example G-code your desired position for the corner would be 182.7,190.2 but subtract in the case of y (in this case (-90+182.7),(97.5-190.2) and the result is 92.7,-92.7)
    • For CR-10, do (-137.5+182.7),(145-190.2) and the result is 45.2,-45.2
  • The example gcode uses:
    • layer height: .1
    • first layer height: .3
    • retraction 3 (Cura's default is 5)
    • retraction speed 40 (Cura's default is 45)
    • for other settings, see tests/data

Development

Alternate towers

The "arches" version has discreet levels:

• It has a 25x25x5 mm base.
• The code accounts for the extents automatically (See cls.MeasureGCode(reader)) but not the base height (and not top?).
• levels: 5 (height of the base; Use the /setat 5 option to account for this), 15, 25, 35, 45, 55, 65 (top of highest level)