Prusa Mini+ Settings Guide: Every Filament Covered

The Prusa Mini+ is a compact, reliable printer with a 180x180x180mm build volume that punches well above its size. With a Bowden-tube setup, SuperPINDA auto-leveling, and a 32-bit Buddy board, it handles PLA and PETG beautifully out of the box. With some tuning, it can also manage ABS (in an enclosure), TPU, and several specialty materials.

This guide provides optimized settings for every common filament on the Mini+, based on PrusaSlicer profiles with adjustments for real-world performance.

Prusa Mini+ Hardware Overview

Understanding the hardware constraints helps explain the settings:

• Hotend: PTFE-lined heatbreak (stock). Max safe temperature: 260°C. Above 240°C, the PTFE liner degrades over time.
• Extruder: Bowden tube (~380mm). Longer retraction needed than direct-drive.
• Bed: Removable spring steel sheet (textured PEI or smooth PEI). Max temperature: 100°C.
• No enclosure: Open frame. ABS requires an aftermarket or DIY enclosure.
• Build volume: 180 x 180 x 180 mm
• Max recommended speed: 80-100 mm/s (Bowden tube limits higher speeds)

PLA Settings

PLA is the Mini+'s sweet spot. The Bowden setup handles PLA perfectly, and the stock PrusaSlicer profile is excellent.

Nozzle Temperature: 210-215°C
Bed Temperature: 60°C
Print Speed: 60-80 mm/s
Outer Wall Speed: 40-50 mm/s
Travel Speed: 150 mm/s
Retraction Distance: 3.2 mm
Retraction Speed: 35 mm/s
Cooling Fan: 100% after first layer
First Layer Speed: 20 mm/s
First Layer Temperature: 215°C
Layer Height: 0.2mm (standard), 0.15mm (quality), 0.1mm (detail)
Infill: 15-20% (decorative), 40% (functional)

Tips:

• The stock PrusaSlicer "0.20mm QUALITY" profile is well-optimized. Use it as your baseline.
• On the smooth PEI sheet, PLA adhesion is excellent. No glue needed.
• The textured PEI sheet gives a nice matte bottom finish but requires slightly higher bed temp (65°C) for PLA adhesion.
• For silk PLA or specialty PLA, increase temperature by 5-10°C.

According to Prusa's knowledge base, the Mini+ is tested and validated with all Prusament filaments, making them the safest choice for guaranteed results.

PETG Settings

PETG is the second most common filament for the Mini+. The main challenge is stringing, which requires careful retraction tuning on the Bowden setup.

Nozzle Temperature: 230-240°C
Bed Temperature: 85°C
Print Speed: 40-60 mm/s
Outer Wall Speed: 30-40 mm/s
Travel Speed: 150 mm/s
Retraction Distance: 3.5-4.0 mm
Retraction Speed: 25 mm/s
Cooling Fan: 30-50%
First Layer Speed: 20 mm/s
First Layer Temperature: 235°C
Z Hop: 0.2 mm
Layer Height: 0.2mm (standard)

Critical tip: Apply a thin layer of glue stick to the PEI sheet before printing PETG. PETG bonds permanently to bare PEI and will rip chunks off your build plate. This applies to both smooth and textured sheets, though the textured sheet is more forgiving.

Stringing reduction:

• Start with retraction at 3.5mm and increase to 4.0mm if needed
• Enable Z hop at 0.2mm to prevent the nozzle from dragging through ooze
• Reduce temperature to 230°C if stringing persists (at the cost of some layer adhesion)
• Enable "wipe while retract" in PrusaSlicer

As Prusa's PETG guide explains, the Bowden tube setup on the Mini+ means retraction distances are higher than on direct-drive Prusa printers like the MK4.

ABS Settings

ABS on the Mini+ is possible but requires an enclosure. Without one, ABS will warp and crack on anything but the smallest prints.

Nozzle Temperature: 245-255°C
Bed Temperature: 100°C (max on Mini+)
Print Speed: 40-50 mm/s
Outer Wall Speed: 30-40 mm/s
Retraction Distance: 3.5 mm
Retraction Speed: 30 mm/s
Cooling Fan: 0-15%
First Layer Speed: 15 mm/s

Important considerations:

• The PTFE-lined heatbreak is the limiting factor. At 250°C, the PTFE liner slowly degrades. For occasional ABS prints, this is manageable. For frequent ABS printing, upgrade to an all-metal heatbreak like the Micro Swiss All-Metal Hotend.
• You need an enclosure. A simple box made from IKEA Lack tables (search 3DSearch for "Prusa Lack enclosure") is the most popular community solution. Alternatively, a cardboard box works in a pinch.
• ABS fumes are toxic. Ensure ventilation even with an enclosure.
• The 100°C max bed temperature is on the low side for ABS. Use a brim for adhesion on larger prints.

ASA Settings

ASA is similar to ABS but more UV-resistant. Same enclosure requirement.

Nozzle Temperature: 250-260°C
Bed Temperature: 100°C
Print Speed: 40-50 mm/s
Cooling Fan: 0-15%
Retraction Distance: 3.5 mm

Note: 260°C is at the very top of the PTFE liner's safe range. Prolonged ASA printing will accelerate liner degradation. The all-metal heatbreak upgrade is strongly recommended for regular ASA use.

TPU (Flexible) Settings

TPU on a Bowden printer is challenging because the flexible filament can buckle in the long tube. The Mini+ can handle shore 95A TPU (like NinjaFlex or Overture TPU) with careful settings, but very soft TPU (85A) is nearly impossible on Bowden setups.

Nozzle Temperature: 220-230°C
Bed Temperature: 50-60°C
Print Speed: 20-30 mm/s (slow is essential)
Outer Wall Speed: 20 mm/s
Travel Speed: 80-100 mm/s (slower than rigid materials)
Retraction Distance: 1.5-2.0 mm (much less than rigid materials)
Retraction Speed: 15 mm/s
Cooling Fan: 50-70%
First Layer Speed: 15 mm/s
Infill: 15-20% (for flexibility)

Tips:

• Reduce retraction to the absolute minimum that prevents stringing. Long retraction with TPU causes jams.
• Keep the filament path as short and constraint-free as possible.
• Use Overture TPU 95A for your first TPU prints — it is stiffer and more forgiving than softer variants.
• Do not use the filament run-out sensor with TPU — it adds friction.

According to Rigid Ink's flexible filament guide, Bowden printers need at least 50% speed reduction compared to direct-drive when printing TPU.

PVB (Polysmooth) Settings

PVB is Polymaker's smoothable filament that can be vapor-smoothed with isopropyl alcohol for a glossy finish.

Nozzle Temperature: 200-210°C
Bed Temperature: 60°C
Print Speed: 40-60 mm/s
Cooling Fan: 50-80%
Retraction Distance: 3.2 mm

PVB prints similarly to PLA but is slightly more sensitive to moisture. Dry before use if you notice stringing or popping.

Wood / Metal Fill PLA Settings

Composite PLAs with wood fiber, copper, or bronze fill use similar settings to standard PLA with key adjustments.

Nozzle Temperature: 200-215°C (wood fill), 210-220°C (metal fill)
Bed Temperature: 60°C
Print Speed: 40-50 mm/s (slower due to higher viscosity)
Retraction Distance: 3.0-3.5 mm
Cooling Fan: 100%
Nozzle Size: 0.5mm or 0.6mm recommended (particles can clog 0.4mm)

Important: Wood and metal fill filaments are abrasive. They will wear out a brass nozzle quickly. Use a hardened steel nozzle for composite filaments.

Layer Height Guide for Mini+

| Layer Height | Quality Level | Print Time | Best For | |---|---|---|---| | 0.30mm | Draft | Fastest | Prototypes, test fits | | 0.20mm | Standard | Balanced | Most prints | | 0.15mm | Quality | Moderate | Display models, detailed functional parts | | 0.10mm | Detail | Slow | Miniatures, fine detail | | 0.07mm | Ultra-detail | Very slow | Maximum detail, small models |

Use layer heights that are multiples of 0.04mm (magic numbers for the Mini+'s Z-axis: 0.04, 0.08, 0.12, 0.16, 0.20, 0.24, 0.28, 0.32) to avoid Z-banding from microstepping artifacts.

Upgrades Worth Considering

The Mini+ is great stock, but these upgrades expand its capabilities:

1. All-metal heatbreak — Print above 240°C safely for ABS, ASA, PA
2. Textured PEI sheet — Better adhesion for PETG, nice matte finish
3. IKEA Lack enclosure — Required for ABS/ASA, helpful for drafty rooms
4. LED light bar — See your prints better (printable mounts available on 3DSearch)
5. Octoprint via Raspberry Pi — Remote monitoring and control

Get Optimized Settings

For model-specific settings on your Prusa Mini+, use the AI Settings feature on 3DSearch. Select the Prusa Mini+ as your printer, choose your filament type, and get recommendations tailored to the model you want to print.

Final Thoughts

The Prusa Mini+ is a workhorse that rewards proper settings. PLA and PETG are its natural habitat — start there, master those materials, and then branch out. The Bowden tube setup means retraction tuning matters more than on direct-drive printers, and the PTFE heatbreak limits high-temperature materials, but within those constraints, the Mini+ produces excellent quality. It is the right printer for anyone who values reliability and print quality over raw speed.