Material
PLA
Printer
Prusa Mk4

Short answer

The Prusa MK4 prints PLA at a 200 to 210 C nozzle and a 55 to 60 C bed, with a short retraction and full cooling after the first layer. The MK4 is direct-drive and runs PrusaSlicer, so it handles PLA clean and retracts short. Run the first-layer calibration, dry the filament, and these numbers give a strong first print.

Starting PLA settings for the MK4

These numbers suit a stock Prusa MK4 with the direct-drive extruder. The nozzle, bed, and fan values track the Prusament PLA datasheet, which lists a 210 C nozzle with a 10 C window, a 40 to 60 C bed, and full fan. The retraction baseline and the speed tuning are Marqilo starting points for the MK4’s direct-drive setup.

Starting PLA settings for a Prusa MK4
SettingRecommendedWhy
Nozzle temp200 to 210 C200 C is a safe start; 210 C helps the MK4 keep up at higher speeds.
Bed temp55 to 60 C60 C gives the strongest first-layer grip on the smooth or textured sheet.
Retraction0.4 to 0.6 mmDirect-drive baseline. Tune within 0.4 to 0.6 mm for stringing.
Part cooling100%Off or low for the first 2 to 3 layers, then 100 percent. PLA takes full cooling.
First layer200 C, 60 C bed, 20 mm/sSlow and warm, so the first layer bonds to the sheet.
Print speed80 to 200 mm/sMarqilo starting point. The MK4 prints PLA fast; the Prusament TDS allows up to 200 mm/s.

How to adjust PLA settings

  1. Run the first-layer calibration

    Use the MK4 calibration routine to set the Z-offset for a smooth, even first layer on the sheet.

  2. Set the temperatures

    Nozzle to 200 C and bed to 60 C is a safe start that melts PLA clean on the MK4.

  3. Run cooling low then full

    Keep the part fan off for the first 2 to 3 layers, then set it to 100 percent.

  4. Tune retraction

    Start at 0.5 mm. If fine strings appear, step toward 0.6 mm until they clear.

What goes wrong

Most failed PLA prints on the MK4 trace to the first-layer calibration and moisture. A Z-offset that is off lifts or ripples the first layer, so rerun the calibration. Wet PLA pops and prints rough, so dry the spool. A nozzle that is too cold under-extrudes at speed, which clears when you lift it toward 210 C. The first-layer adhesion guide covers the bed-side fix.

Frequently asked

What PLA nozzle temp for the Prusa MK4?
200 to 210 C. Start at 200 C and move to 210 C at higher speeds. The Prusament PLA datasheet centers on 210 C with a 10 C window.
Do I need to calibrate the first layer on the MK4?
Yes. The MK4 first-layer calibration sets the Z-offset, which does more for PLA adhesion than any temperature. Run it after any nozzle or sheet change.
How fast can the MK4 print PLA?
80 to 200 mm/s is a safe range, and the Prusament PLA datasheet allows up to 200 mm/s. Keep the first layer slow and the outer walls at 50 to 80 mm/s for finish.

For the material side, the PLA hub explains the filament in depth, and the filament storage guide covers keeping spools dry.

Related guides

Related

Cross-reference

Sources & methodology

3 citations · reviewed 2026-07-10
  1. 01Prusament PLA Technical Datasheet (TDS PDF): nozzle, bed, fan, and print speedaccessed 2026-06-29Tier 1
  2. 02Prusa Knowledge Base: PrusaSlicer print settingsaccessed 2026-06-29Tier 1
  3. 03Bambu Lab PLA Usage Guide (wiki): PLA bed temperature and handlingaccessed 2026-06-29Tier 1
How we vetted this: every claim traces to a tiered source, Tier 1 (manufacturer, slicer, standards) first. Read the full sourcing and conflict-of-interest policy.