Pro PCTG is a co-polyester like PETG, so a working PETG setup is a reasonable starting point. But a few differences matter a lot, and PETG settings carried over unchanged are the most common reason first prints disappoint.
| Setting | PETG habit | Pro PCTG |
|---|---|---|
| Nozzle temperature | 230–250°C | 250–280°C |
| Part cooling | Moderate | As low as possible, at least 50% less than PETG |
| Speed and acceleration | High-speed profiles common | No feature over 150 mm/s; outer walls and top surfaces 100 mm/s or less; gentle acceleration |
| Pressure advance | Often left at default | Calibrate it every time; the right value is critical |
| Bed | 70–80°C | 80°C on textured PEI; avoid bare smooth PEI |
Why Pro PCTG needs slower speeds
Molten Pro PCTG is more viscous than PETG. It takes longer to melt fully, builds pressure in the nozzle more slowly, and drags on the nozzle if the toolhead changes direction hard. Slower speeds and acceleration give stronger layer bonding and keep plastic from collecting on the nozzle. In exchange, you get parts with much better impact, chemical, UV, and heat resistance. See How is Pro PCTG better than PETG?.
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