02 August, 2020

Comparing Cura profiles

Today, I want to test the differences between the Cura 'Standard Quality' profile and Chuck Hellebuyck's profile 'Cura for Creality Printers'.

Plan

  • Load the build plate with a few simple models.
  • Slice with the default 'Standard Quality' profile.
  • Print the models
  • Slice with CHEPV4.6.x_0.20(Good) profile
  • Print the model
  • Compare results

Actual

  • Room
    • 22C
    • Humidity 52

Run 1 - Standard Quality

  • Preheat the hot end to 190C
  • Preheat the bed to 70C
  • Note: Took about minutes to get the hot end and bed to temperature.
  • Slice the models
    • Estimates 
      • time 1 hours 17 minutes
      • material PLA 10g - 3.34 m
    • hot end to 200C
    • bed to 60C
    • Notes: Cura gave warning about the model not being manifold. 
  • OctoPrint 
    • estimates a time of 50 minutes
    • Octolapse running
  • End of run 1 notes
    • Lots of blobs, zits, and stringing when the hot end moves away for a picture.
    • Little stringing between objects
    • Print Time
      • OctoPrint 1:25:21
      • Cura with OcotoPrint connection 1:25:21
      • Slack notifications 1:25
    • Raspberry Pi temperature ranged from 38C to 40C
    • No noticeable lifting of the model from the bed
    • skirt pulled away from the bed easily, Measured skirt thickness at several places. Values ranged from .19mm to .23mm.
    • Models popped off the bed with just finger strength. 
      • EasyCalib3.stl
        • slight rounding of the corners of the base.
        • little z banding


      • TESTBLOKJE.STL
        • blobs from where the hot end moved away from the model. Most noticeable blobs were pointing in the direction the hot end moves away for Octolapse to take a picture. 


      • OpenRC_Calibration_Cube.stl
        • The M3 nuts I have did not fit the holes. The holes are just too small. 
        • Some blobs from Octolaspe


      • CHEPCalibrationCube.stl
        • Some blobs from Octolaspe 
        • X face - 20.01 to 20.42
        • Y face - 20.10 to 20.34
        • Z face - 19.95 to 20.24


Run 2 - CHEPV4.6x_0.20(Good)

  • Preheat the hot end to 190C
  • Preheat the bed to 70C
  • Slice the model 
    • Estimates
      • time 1 hour 39 minutes
      • material PLS 13g - 4.29m
  • OctoPrint
    • estimates 1 hour
    • Octolapse running
  • End of run 2 notes
    • Lots of blobs, zits, and stringing when the hot end moves away for a picture. The amount of artifacts seems lower. 
    • Almost no stringing between objects. 
    • Print Time
      • OctoPrint 1:42:52
      • Cura with OcotoPrint connection 1:42:52
      • Slack notifications 1:42
    • Raspberry Pi temperature ranged from 39C to 42C
    • No noticeable lifting of the model from the bed
    • skirt pulled away from the bed easily, Measured skirt thickness at several places. Values ranged from .17mm to .22mm.
    • Models popped off the bed with just finger strength. 
      • EasyCalib3.stl
        • No Z banding


      • TESTBLOKJE.STL
        • very similar to run 1.
        • more blobs on the pyramid


      • OpenRC_Calibration_Cube.stl
        • I was able to fit a nut into a few but not all of the holes and slots.


      • CHEPCalibrationCube.stl
        • x face - 20.0 to 20.35
        • y face - 20.01 to 20.25
        • z face - 19.95 to 20.20





Resources

  • walls are exact 1.0mm to see eventual over- or underflow
  • a little 45° overhang with a 1.0mm platform that shows warping and if you probably need to change the filament-fan speed
  • stringing in the tube or between tube and platform
  • a 0.2mm space between the cube and the cylinder to check with a paper if needed
OpenRC Calibration Cube (OpenRC_Calibration_Cube.stl)
  • M3 nuts should fit    
CHEP Calibration Cube (CHEPCalibrationCube.stl)
  • 20mm by 20mm by 20mm

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