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PrusaSlicer Setup for MY-Mini

PrusaSlicer is a powerful, open-source slicer that is highly recommended for your MY-Mini 3D Printer. It's known for its advanced features, regular updates, and excellent print quality. This guide will walk you through setting it up for your printer.

1. Setting Up the Printer Profile

First, you need to tell PrusaSlicer about your printer's hardware.

  1. Open PrusaSlicer and run the Configuration Wizard (Configuration > Configuration Wizard).
  2. On the "Prusa FFF" page, you can uncheck all printers.
  3. On the "Other Vendors" page, select Custom Printer.
  4. On the next screen, define your printer's profile:
    • Firmware Type: Marlin (Legacy)
    • Bed Shape: Set the dimensions to 180 x 180 mm. The origin should be at the front-left corner, so set it to X: 0, Y: 0.
    • Printable Height (Z): Set to 180 mm.
    • Nozzle Diameter: 0.4 mm (or your installed nozzle size).
    • Extruder Temperature: 215 °C (for PLA, can be changed later).
    • Bed Temperature: 60 °C (for PLA, can be changed later).
  5. Click Finish. You now have a basic profile for your MY-Mini.

2. Understanding Profiles

PrusaSlicer organizes settings into three main categories:

  • Print Settings: Controls the quality and speed of the print (layer height, infill, supports, etc.). You can have multiple print profiles (e.g., "0.15mm Quality", "0.25mm Draft").
  • Filament Settings: Controls filament-specific properties (temperatures, cooling, retraction). You should have a profile for each type and brand of filament you use (e.g., "MyBrand PLA", "Generic PETG").
  • Printer Settings: Defines the hardware of your printer. You will generally only have one profile here for your MY-Mini.

Here are good starting points for common filaments. You should create a new filament profile for each.

PLA

  • Extruder Temperature: 210-220 °C
  • Bed Temperature: 60 °C
  • Cooling: 100% fan speed after the first few layers.
  • Retraction: A good starting point is 0.8mm distance at 35 mm/s speed for a direct drive extruder.

PETG

  • Extruder Temperature: 230-250 °C
  • Bed Temperature: 70-85 °C
  • Cooling: 30-50% fan speed. Too much cooling can cause poor layer adhesion.
  • Retraction: PETG is prone to stringing. Try 1.0mm distance at 40 mm/s and consider increasing Z-hop.

ABS

  • Extruder Temperature: 240-260 °C
  • Bed Temperature: 95-110 °C
  • Cooling: Turn the part cooling fan off (0-10%). ABS needs to cool slowly to prevent warping and cracking.
  • Enclosure: An enclosure is highly recommended to maintain a stable ambient temperature.

4. Print Quality and Speed

  • Layer Height: For detailed prints, use 0.15mm. For faster drafts, use 0.20mm or 0.25mm.
  • First Layer Height: A thicker first layer, like 0.20mm, can improve bed adhesion.
  • Infill: 15-20% with the Grid or Gyroid pattern is a good all-around choice.
  • Speed: A general print speed of 40-50 mm/s for perimeters and 60-80 mm/s for infill is a good starting point.

5. Supports and Bed Adhesion

  • Bed Adhesion: For parts with a small footprint or sharp corners, use a Brim of 3-5mm to prevent warping and improve adhesion.
  • Supports: PrusaSlicer has excellent support options. For most models, Grid supports work well. For complex organic shapes, try Tree supports (Paint-on supports > Style > Organic). Set the overhang threshold to around 45 degrees.