Best PLA+ Settings for Prusa Printers?

Struggling with brittle prints, stringing, or poor bed adhesion when using PLA+ on your Prusa printer? PLA+ offers superior strength and flexibility over standard PLA, but it demands precise slicer settings to unlock its potential. Wrong temperatures or speeds can lead to failed prints, wasting time and filament.

In this guide, you'll learn proven filament settings tailored for Prusa printers like the MK3S+, MK4, or Mini. We'll cover everything from slicer setup to fine-tuning, so you can print reliable parts effortlessly. Expect 30-45 minutes for initial setup, plus 1-2 hours for a test print—perfect for intermediate users familiar with basic slicing.

By the end, you'll have a custom PLA+ profile ready to slice flawless models, reducing waste and boosting print success rates.

▸What You'll Need

• •Prusa 3D printer (e.g., MK3S+, MK4, Mini+ with latest firmware)
• •PrusaSlicer (version 2.7+), SuperSlicer, or OrcaSlicer (free download)
• •1.75mm PLA+ filament spool (measured diameter 1.75mm ±0.05mm)
• •USB drive or SD card for transferring G-code
• •Digital caliper (optional, for filament measurement)
• •Test print model like XYZ Calibration Cube or Benchy (from Printables.com)

Estimated Time: 30-45 minutes setup + 1-2 hours test print Difficulty: intermediate

▸Step-by-Step Instructions

Step 1: Understand PLA+ vs. PLA Differences

PLA+ is an enhanced PLA variant with additives for better toughness, impact resistance, and heat tolerance (up to 60°C vs. PLA's 50°C). It prints similarly but requires slightly higher nozzle temps (210-230°C) and can be more prone to stringing if not tuned.

Why it matters: Default PLA profiles often underextrude PLA+, leading to weak layers. Expect smoother surfaces and stronger parts once dialed in.

Download a calibration model from Printables.com to test later.

💡 Tips:

• •PLA+ absorbs less moisture than PLA but still dry it at 45-50°C for 4 hours if stored poorly.

⚠️ Warnings:

• •Don't confuse with PETG—PLA+ is not food-safe without certification.

Step 2: Install and Update PrusaSlicer

Download the latest PrusaSlicer from prusa3d.com (free). Install and launch it.

Select your exact printer model under Printer Settings > Machine (e.g., Prusa MK4 or MK3S+). This loads firmware-matched defaults.

Why it matters: Outdated slicers miss Prusa-specific optimizations like input shaping for faster speeds.

💡 Tips:

• •Use SuperSlicer or OrcaSlicer for advanced modifiers if PrusaSlicer feels limited.

Step 3: Load or Create PLA+ Filament Profile

Filament Settings > Create new filament named 'PLA+ Custom'. Start from 'Generic PLA' as base.

Key starting values:

• •Filament type: PLA
• •Diameter: 1.75 mm (measure 10 spots with caliper, average)
• •Extrusion multiplier: 1.00 (calibrate later)

Why it matters: Prusa's generic profiles are close but PLA+ needs tweaks for density differences.

💡 Tips:

• •Import community profiles from Printables for your specific PLA+ brand.

Step 4: Set Nozzle and Bed Temperatures

Extruder > Temperature: 220°C first layer, 215-225°C others (start at 220°C).

Bed > Temperature: 60°C all layers (Prusa stock beds handle up to 100°C but 60°C suffices).

Why it matters: PLA+ melts at higher temps for better flow; too low = underextrusion, too high = oozing. Expect glossy finishes at 220°C.

⚠️ Warnings:

• •Monitor first print—over 230°C risks nozzle clogs on brass nozzles.

Step 5: Configure Print Speeds

Print Settings > Speed:

• •First layer: 20-30 mm/s
• •Infill: 80-100 mm/s
• •Perimeters/walls: 50-70 mm/s
• •Travel: 150 mm/s

Enable input shaper if on MK4.

Why it matters: PLA+ handles speeds like PLA but faster reduces stringing; test at 60mm/s average.

💡 Tips:

• •Slow to 40mm/s for detailed models.

Step 6: Tune Retraction Settings

For Bowden (MK3S+): Retraction length: 6.5 mm, speed: 60 mm/s.

Direct drive (MK4/Mini): 0.8 mm at 40 mm/s.

Enable Z-hop: 0.4 mm.

Why it matters: PLA+ is stringy; proper retraction prevents blobs. Expect clean travels.

⚠️ Warnings:

• •Excessive retraction grinds filament—monitor wear.

Step 7: Optimize Cooling and Layer Height

Cooling > Fan speed: 100% after layer 2, 50-70% layer 1-2.

Layer height: 0.2 mm standard (0.15-0.3 mm range).

Why it matters: Strong cooling solidifies PLA+ quickly for bridges/overhangs; poor cooling warps tall prints.

💡 Tips:

• •Enclosure optional for temp stability.

Step 8: Slice, Test, and Iterate

Load test model (e.g., 20mm cube). Slice and preview layers.

Print and inspect: Measure walls (should be 0.4mm single wall), check adhesion.

Tweak: +5% flow if gaps, +5°C nozzle if dull.

💡 Tips:

• •Use PLA+ Calibration Profile Generator for auto-tunes.

▸Pro Tips

• •Always dry PLA+ before use—use a food dehydrator at 50°C for 4-6 hours.
• •Measure filament diameter precisely; variances over 0.05mm cause inconsistencies.
• •Calibrate e-steps first via Prusa's menu for accurate extrusion.
• •Print a retraction tower test from TeachingTech's models to fine-tune.
• •Use PEI bed with glue stick for adhesion; clean with IPA weekly.
• •For speed demons: Push to 120mm/s on MK4 with linear advance.
• •Save your profile and share on Prusa forums for feedback.

▸Common Mistakes to Avoid

• •Using stock PLA settings: Causes underextrusion and weak bonds—switch to custom PLA+ profile.
• •Ignoring filament diameter: Leads to over/under extrusion—always measure.
• •Too-low bed temp (<55°C): Poor first-layer adhesion, especially on glass beds.
• •Skipping drying: Moisture causes popping and stringing—dry every spool.
• •High temps without retraction tune: Oozing everywhere—start with 220°C max.

▸Troubleshooting

Problem: Stringing or blobs

Solution: Increase retraction length by 0.5mm or speed by 10mm/s; lower nozzle temp 5°C.

Problem: Poor layer adhesion

Solution: Raise nozzle temp to 225°C, slow first layers to 25mm/s, ensure bed level.

Problem: Warping or corners lifting

Solution: Bump bed to 65°C, add brim/skirt, use enclosure if drafts are present.

Problem: Underextrusion

Solution: Check diameter, increase flow 5%, clean nozzle, dry filament.

Overture PLA+ Filament 1.75mm 1KG

Consistent diameter, high toughness, low stringing—ideal for Prusa tuning.

Best for: Everyday prints needing strength; black/white spools for testing.

Price Range: $20.99

SUNLU PLA+ Filament 1.75mm 1KG Spool

Smooth flow, vibrant colors, Prusa-compatible—community favorite for profiles.

Best for: Colorful functional parts; great for calibration cubes.

Price Range: $21.99

eSun PLA+ Filament 1.75mm

Budget-friendly with excellent layer bonding and heat resistance.

Best for: High-volume printing on MK3S+; matte finish spools.

Price Range: $22.99

Creality Filament Dry Box

Keeps PLA+ dry during long prints—essential for consistent results.

Best for: Humid environments; holds 1KG spool with desiccant.

Price Range: $59.99

Neiko Digital Caliper

Precise 0.01mm accuracy for filament and nozzle measurements.

Best for: Diameter checks before every spool.

Price Range: $15.99