Material
PETG
Printer
Creality K1

Short answer

The Creality K1 prints PETG at a 240 to 250 C nozzle and a 70 to 90 C bed, with low part cooling and a short direct-drive retraction. The K1 is a fast CoreXY with an all-metal hot end, so it takes the heat PETG needs, but PETG strings when wet, so dry the spool first. Slow the first layer and these numbers give a clean print.

Starting PETG settings for the K1

These numbers suit a stock Creality K1 with the direct-drive extruder. The nozzle and bed values track the Polymaker and Prusament PETG datasheets. The retraction and speed tuning are Marqilo starting points for the K1’s fast, direct-drive setup. Dry the PETG first.

Starting PETG settings for a Creality K1
SettingRecommendedWhy
Nozzle temp240 to 250 C240 C is a safe start; 250 C for faster speeds. The K1 all-metal hot end handles the full PETG range.
Bed temp70 to 90 C80 C gives strong grip on the textured PEI.
Retraction0.6 to 0.8 mmDirect-drive baseline. Tune within 0.6 to 0.8 mm for stringing.
Part coolingOff, then 30 to 50%Off for the first 2 to 3 layers, then 30 to 50 percent. PETG weakens under full cooling.
First layer240 C, 80 C bed, 20 mm/sSlow and warm, so the PETG bonds to the sheet.
Print speed80 to 200 mm/sMarqilo starting point. The K1 prints PETG fast; slow the outer walls for finish.

How to adjust PETG settings

  1. Dry the PETG

    Run the spool at 60 to 65 C for 4 to 8 hours, then print from a dryer if you can.

  2. Set the temperatures

    Nozzle to 240 C and bed to 80 C is a safe start that melts PETG clean on the K1.

  3. Keep cooling low

    Run the part fan off for the first 2 to 3 layers, then 30 to 50 percent.

  4. Slow the first layer

    Hold the first layer at 20 mm/s so it bonds, then let the speed climb.

What goes wrong

Most failed PETG prints on the K1 trace to wet filament and too much cooling. Wet PETG strings and prints cloudy, so dry the spool. Full part cooling weakens the layers, so cap it at 30 to 50 percent. A nozzle too cool under-extrudes at speed, which clears when you lift it toward 250 C. The PETG stringing guide covers the hairs.

Frequently asked

What PETG nozzle temp for the Creality K1?
240 to 250 C. Start at 240 C and move to 250 C at higher speeds. The K1 all-metal hot end handles the full PETG range.
What bed temp for PETG on the K1?
70 to 90 C. 80 C is a safe default on the textured PEI that grips without overheating the chamber.
Why is PETG stringing on the K1?
It is usually wet filament. Dry the PETG at 60 to 65 C first, then raise retraction toward 0.8 mm and keep part cooling low.

For the material side, the PETG 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. 01Polymaker PETG Technical Data Sheet (TDS V2.0 PDF)accessed 2026-06-29Tier 1
  2. 02Prusament PETG Technical Datasheet (TDS PDF)accessed 2026-06-29Tier 1
  3. 03Creality Wiki: Ender and K-series documentationaccessed 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.