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vitalbir

Issues on my first 3DBenchy boat - PETG - Ender 3

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Posted · Issues on my first 3DBenchy boat - PETG - Ender 3

I bought an ender 3 Pro to learn to print and be able to help make face shields for my country. I've always worked with CNC Milling, so I have some notions about printing, but a lot is new to me.
After two days of doing many tests, attempts and reading a lot on the internet, I got a satisfactory result from the boat.

 

photo_2020-04-06_08-21-22.thumb.jpg.23bf67f5294e9680d10446638e908399.jpg

 

photo_2020-04-06_11-01-27.thumb.jpg.1a6b933120e7f558aae899604747c2ca.jpg

 

photo_2020-04-06_11-01-26.thumb.jpg.c0b17e7f0dbb8a87f6520dc9355ac546.jpg

the text below was not very good, it seems that the adhesion of the first layer was weak

 

 

But I wanted to understand what are the errors in it and how it could improve, I have no ideas to try (increase temperature, decrease fan speed, etc ...).

Printer: Ender 3 Pro

Filament: PETG

Bed: creality tempered glass (using the hairspray)

Nozzle: 0.4 (the standard that comes with ender 3)

Slicer: Ultimaker Cura 4.5

Settings:

  • Layer Height: 0.2mm
  • First Layer Height: 0.3mm
  • Line Width: 0.4mm
  • Wall Thickness: 1mm
  • Wall Line Count: 3
  • Z Seam Alignment: Random
  • Printing Temperature: 240 ºC
  • Printing Temperature Initial Layer: 235 ºC
  • Build Plate Temperature: 75 ºC (but after about 30 minutes of printing, I saw that the boat was detaching from the table, so I increased the temperature to 82 ºC and it seems that it helped not to come off completely, I a previous attempt the boat has completely pulled off from the bed)
  • Build Plate Temperature Initial Layer: 85 ºC
  • Print Speed: 40 mm/s
  • Infill Speed: 20 mm/s
  • Wall Speed: 20 mm/s
  • Travel Speed: 150 mm/s
  • Initial Layer Speed: 17 mm/s
  • Initial Layer Travel Speed: 200 mm/s
  • Retraction Distance: 6mm
  • Retraction Speed: 40mm/s
  • Fan Speed: 20%
  • Initial Fan Speed: 0%
  • Z offset: 0.05

 

I tried using Z Seam Alignment = Random, after I was using the default and got this result (which I didn't like):

photo_2020-04-06_11-08-26.thumb.jpg.3d042d1111ef2ba7d5b08f3ad1c1b011.jpg

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