diff --git a/calibration.html b/calibration.html index 07ea024..cf87fb7 100644 --- a/calibration.html +++ b/calibration.html @@ -17,11 +17,11 @@
  • Slicer Flow Calibration
  • Stepper Motor Driver Current
  • Temperature Tuning
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  • Retraction Tuning
    • +
  • Retraction Tuning
    • +
  • Speed & Max Flow Tuning
  • Acceleration Tuning
  • Linear Advance
  • XYZ steps Calibration
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  • Speed & Max Flow Tuning
    • @@ -848,63 +848,66 @@ M84 ; disable motors

    Lower acceleration and jerk will result in a slower print time, as the printer reaches top speed more gradually and corners at a lower velocity. This is easier on the printer, with potentially increased component lifespan and less need for regular maintenance. It reduces surface artefacts such as ringing/ghosting, unless it is far too conservative, in which case it may introduce bulging in corners.

    Calculating maximum feedrate - optional but strongly recommended

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    One strategy is to calculate the fastest your 3D printer can move while extruding cleanly, set this feedrate in the slicer, and then tune acceleration to meet this speed. If you are not interested in printing as fast as possible, skip to the next section.

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    This part of the guide and calculator is adapted from Martin Pirringer's tutorial. Please consider supporting him and his robotics team through paypal or you can also donate to team 1989 through their Team 1989 Web Site

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    The following calculator will assist you in determining the maximum feedrate your printer/extruder/hot end is capable of.

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    1. Clear debris from hobbed gear, bring nozzle up to normal printing temp and load filament.
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    2. Enter the following into pronterface. This will set movement to relative and then extrude 50mm of filament at a feedrate of 2mm/sec:
      3. - 
      G91
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      G1 E50 F120
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    3. Inspect extruded filament for consistency. If all is well, keep repeating with higher feedrate F, until extrusion is inconsistent, extruder stepper skips steps and/or hobbed gear starts eating into filament.
      - The following are examples of increasing the extruder feed rate by 1mm/sec each time, although you should stop when the extrusion becomes problematic. You may have more or less steps than this:
      4. - 
      G1 E50 F180
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      G1 E50 F240
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      G1 E50 F300
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      G1 E50 F360
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      ...
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    4. After you find the limiting speed, back off and repeat the test at a lower feedrate several times in a row until you are confident of reliable and repeatable extrusion.
      Don't forget to put the printer back into absolute movement mode:
      5. - 
      G90
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    5. Enter your reliable feedrate and filament diameter below:
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      Maximum feedrate calculator
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      Your maximum reliable extrusion rate is 7.22 mm³ per second.

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    6. Enter the following settings from your slicer:
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      Input setting:
      Quality > Layer heightLayer > Primary layer heightPrint settings > Layers and perimeters > Layer height > Layer heightPrint settings > Slicing > Layer height > Base Layer heightTemplate > Layer > General > Layer height
      Quality > Line widthExtruder > Extrusion widthPrint settings > Advanced > Extrusion width > Default extrusion widthPrint settings > Width & Flow > Extrusion width > defaultTemplate > Extruder > General > Extrusion width
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      Your maximum reliable XY feedrate is 90 mm per second.

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      Warning: This value is dependent on a number of variables such as filament type, brand, colour, ambient temperature, etc. Be conservative to ensure success.

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    This is simplified test that will not be as accurate as using the gcode generator on the Speed/Max flow tab. If you would like to see it, you can toggle visibility here.

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    Acceleration Tuning

    We will now produce an acceleration tower to conveniently test back to back settings in a single print. If you would like to slice the model yourself, here is the STL: accelerationtower.stl. It should be sliced with a normal base, but hollow, no top layers and only 2 perimeters.

    The only thing you need to know before this test is whether your firmware is set up for jerk (older) or junction deviation (newer). Entering M503 via terminal will give a list of printer variables:

    @@ -1116,7 +1119,7 @@ M84 ; disable motors
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    Speed/Feedrate/Max Flow Tuning

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    Speed & Max Flow Tuning

    Aim:

    To find the maximum feedrate suitable for the outer walls, in terms of surface artefacts, flow rate and reliable extrusion.

    When required: