Print quality — which page
Print quality on the G1 goes wrong in a handful of recognisable ways. Find the one that looks like yours.
| What you see | Page |
|---|---|
| Corners or edges lift off the bed; top layers bow up on a tall part | Warping |
Layers offset or bumped against each other; the print stops with stepper too far in past | Layer shift |
| Blobs at corners or line starts; strings between parts; solid infill wrong while walls are right | Blobs and stringing |
| Walls rough or turbulent; horizontal stripes; a wavy first-layer edge; clear material not clear | Surface finish |
| First layer too squashed or too high, not sticking, nozzle scraping | Z offset and first layer |
| Foamy, bubbly, crackling extrusion | PETG foaming and moisture |
| Uneven colour, transparent streaks in coloured parts | Colour streaks and pigment dosing |
| Motor clicking, under-extrusion, nothing coming out | Extruder motor skipping · Nozzle and barrel clog |
Two things that are not faults: the first purge line is often thin or ragged while the barrel settles, and clears within a few lines; and visible layers in clear PETG are inherent to printing in layers.
The settings that decide quality before you start
Section titled “The settings that decide quality before you start”| Setting | What to do |
|---|---|
| Wall generator | Arachne, on every nozzle — Classic misbehaves when a wall is close to the line width |
| Layer height and line width | Take them from the process profile for your nozzle — roughly half the nozzle diameter, and a little over it |
| First layer height | The profile’s; about 1 mm on the large nozzles |
| First layer flow | +10–15% when adhesion is poor |
| Minimum layer time | Leave it on. It is what slows small parts down, and that slowing is the cooling |
| Slow down on overhangs | Off unless you need it — it causes speed drops that look like faults |
| Brim | Inner and outer on large flat parts |
Full reference: FGF-specific settings.
What prevents most of it
Section titled “What prevents most of it”- Rotation Volume calibration whenever the material or nozzle changes
- Dry material — Starting the dryer
- The right Z offset — most “adhesion” and “quality” complaints start at the first layer
- A layer height that matches the nozzle