“Temperature” on a CR-10 means two specific settings: how hot the nozzle runs, and how hot the bed runs. Get either one wrong and the same spool of filament that prints beautifully for someone else will string, warp, delaminate or refuse to stick for you. The old version of this page talked about keeping the machine itself at room temperature — that was never the real question. This guide answers the actual one: which temperatures to set for each material on a stock CR-10, how to find the sweet spot for your spool, and how to read the symptoms when a setting is off.
Hold one thing in mind: every range below is a working range, not a law. Filament brands — and even blends within a brand — differ. Start mid-range, then tune with the temperature tower method further down.
CR-10 temperatures at a glance (stock machine)
These ranges assume the stock CR-10 hotend — the PTFE-lined design the machine shipped with. That assumption matters: it caps how hot you can safely print, as the next section explains.
| Material | Nozzle temperature | Bed temperature | Notes |
|---|---|---|---|
| PLA | 190–220 °C | 50–60 °C | The forgiving material; most spools land near 200–210 °C |
| PETG | 220–245 °C | 70–85 °C | Stronger and more heat-resistant; watch the top of the range on a stock hotend |
| TPU (flexible) | 210–240 °C | 40–60 °C | Print slowly; temperature matters less than speed and retraction restraint |
| ABS | 230–250 °C | 90–110 °C | Needs an enclosure in most rooms — see the warning below |
A few qualifiers the table can’t hold. First layers often print 5 °C hotter, on both nozzle and bed, to help the plastic flow and grip; most slicers expose this as a separate setting. Bed temperatures assume the stock glass plate; other surfaces want slightly different values. And ABS deserves its caveat in full: the temperatures are correct, but an open-frame CR-10 in a cool or draughty room will warp and crack ABS prints regardless — the part cools unevenly in open air. An enclosure, or at minimum a draft-free corner, makes ABS realistic on this machine.
The stock hotend ceiling: the 240 °C PTFE limit
This is the fact spun versions of this topic leave out — and the most important one on the page.
On a stock CR-10, the Bowden tube is PTFE, and it runs down through the hotend until it sits directly against the back of the nozzle — the tube’s end lives at printing temperature. PTFE holds up fine at PLA and PETG temperatures, but sustained printing above roughly 240–245 °C breaks it down: the tube end softens, degrades and shrinks back from the nozzle, leaving a gap where molten filament collects — causing jams and inconsistent extrusion no slicer setting will fix. Degraded PTFE also produces unpleasant fumes, a second reason not to cook it.
Practical rules that follow from this:
- Occasional short prints near the top of the PETG range are normal use; long, sustained printing at 245 °C and above is where stock tubes wear out fast.
- Materials that genuinely need 250 °C or more — most nylons, polycarbonate, the hotter technical filaments — are not stock-CR-10 materials, whatever the product page implies.
- Printing them safely requires an all-metal hotend, where a metal heat break replaces the PTFE at the hot end. That is an upgrade decision, not a settings decision.
- Treat the tube as a consumable: if extrusion problems follow a spell of hot printing, inspect and trim or replace the tube end before blaming anything else.
Finding your filament’s sweet spot: the temperature tower
The range on the spool label is the manufacturer’s window, not your answer — the best temperature depends on your printer, your nozzle and your room. The reliable way to find it is a temperature tower: a single test print, sliced so the nozzle temperature steps down (or up) by 5 °C at each section. One print then shows you the whole range side by side, from your machine, with your filament.
Read each section of the finished tower for three things:
- Stringing: Fine hairs between the tower’s posts mean the plastic is still too fluid at that temperature. Stringing usually decreases as the steps go down — the coolest section with clean posts is a strong candidate.
- Layer adhesion and strength: Flex or try to snap the sections by hand. Layers printed too cold bond weakly and split cleanly along layer lines; the right temperature resists and deforms instead.
- Surface finish and detail: Too hot looks glossy and slightly melted, with drooping bridges and blurred detail. Too cold looks matte and rough, sometimes with gaps between lines. The sweet spot has sharp detail, tidy bridges and an even finish.
Pick the coolest section that still bonds strongly and looks clean — cooler printing generally means less stringing and better overhangs, as long as strength holds up. Our step-by-step calibration guide walks through the full calibration sequence, temperature towers included, in the order to run them. Once you have a number for a spool, write it on the label — the same brand and material will usually want the same setting next time.
Symptoms: too cold vs too hot
When a print looks wrong, temperature is a prime suspect — and the failure modes at each end of the range are distinct enough to diagnose from the part itself.
| Too cold | Too hot |
|---|---|
| Layers split or peel apart; the part breaks easily along layer lines (poor layer adhesion) | Fine strings and hairs across gaps and between features (stringing) |
| Extruder clicks or skips, struggling to push stiff, under-melted plastic through the nozzle | Filament oozes during travel moves, leaving blobs and zits on surfaces |
| Surface looks matte, rough and slightly under-filled, as if the lines never fully merged | Overhangs and bridges droop; corners and fine detail look melted or washed out |
| First-layer corners let go because cold plastic grabs the bed poorly | Long prints clog partway as heat creeps up the hotend and softens filament where it should stay solid (heat creep) |
| Fix: raise the nozzle in 5 °C steps and re-check; confirm the clicking isn’t a partial clog | Fix: lower the nozzle in 5 °C steps; check the part-cooling fan runs after the first layers, and that retraction is enabled |
Two habits prevent most misdiagnosis. Change one variable at a time — temperature, then speed, then retraction — never all three between two prints, or you won’t know which change did the work. And rule out simple mechanical causes too: a clicking extruder is at least as often a partial clog or a tangled spool as a cold nozzle.
Bed temperature on the CR-10’s big glass bed
The CR-10’s bed is a 300 × 300 mm glass plate, and its size changes how bed temperature behaves:
- Let it soak. The display shows the temperature at the sensor, under the plate. A large sheet of glass takes several minutes to reach that temperature at its surface — give the bed a few extra minutes before starting, and especially before levelling.
- Centre and edges are not the same temperature. Edges and corners lose heat to the room and run cooler than the middle — one reason large prints lift at the corners first, and why a centrally placed print is more forgiving than one pushed to an edge.
- Glass holds heat evenly but slowly. The thermal mass that keeps the surface stable also makes it slow to cool — prints often release on their own as the plate finally drops toward room temperature.
Temperature is only half of the sticking equation; a hot bed won’t rescue a dirty plate or a nozzle that starts too high. Our CR-10 bed adhesion guide works through the full ladder — cleaning, levelling, Z-offset and surface help — in the order to check them.
Frequently asked questions
What is the best temperature for PLA on a CR-10?
Somewhere in the 190–220 °C range, with the bed at 50–60 °C. Most PLA spools print well around 200–210 °C on a stock CR-10, but the spread between brands is real — run a temperature tower if a new spool strings or looks rough, rather than assuming the last spool’s setting carries over.
Can a stock CR-10 print ABS?
Yes, with conditions. The temperatures (230–250 °C nozzle, 90–110 °C bed) are within reach, but ABS warps and cracks as it cools unevenly, so an enclosure or a genuinely draft-free spot is close to essential. Keep prints at the lower end of the range where the filament allows it — long sessions at 250 °C are hard on the stock PTFE tube.
What is the hottest a stock CR-10 can print?
Treat roughly 240–245 °C as the practical ceiling for sustained printing: the PTFE tube sits against the nozzle and degrades above that range, causing jams and extrusion problems. Filaments needing more heat — most nylons, polycarbonate — need an all-metal hotend first.
Why does my extruder click while printing?
Clicking means the extruder is pushing filament faster than the hotend will accept it. Printing too cold is one cause — under-melted plastic is stiff and resists — and raising the temperature in 5 °C steps is a fair first test. But a partial nozzle clog, a degraded Bowden tube end, or an over-fast first layer produce the same sound, so check those before assuming temperature is the whole story.
Does room temperature affect CR-10 printing?
At the margins. A cold or draughty room steals heat from the bed’s edges and worsens warping, especially with ABS; a very warm room makes heat creep slightly more likely on long PLA prints. But it doesn’t change the settings themselves — the ranges here apply in any normal room.
