Printing

Everything about selecting, starting, monitoring, and tuning your prints.

Selecting a File

Print Select Panel

From the Home panel, tap the print file area (shows “Select a file” when idle)
Browse your G-code files from Moonraker’s virtual SD card

View options:

Card View (default): Thumbnails with file info — estimated time, filament usage, slicer
List View: Compact view for browsing many files (toggle with the grid icon in top-right)

List View

List view shows filename, print status, file size, modification date, and estimated print time in a sortable table. Tap any column header to sort.

Sorting options (tap the sort button):

Name (A-Z or Z-A)
Modified date (newest or oldest first)
Size (largest or smallest)
Print time (longest or shortest)

File Preview

Tap a file to see the preview panel:

3D G-code preview: Rotatable with touch, showing the toolpath
Metadata: Estimated time, filament weight, layer count, material, and layer height
Pre-print steps: Shows which calibration steps will run before printing (e.g., bed mesh)
Timelapse toggle: Enable recording if you have the timelapse plugin installed

Pre-Print Options

Before starting, you can enable or disable:

Option	What It Does
Auto bed level	Run bed mesh calibration before print
Quad gantry level	Run QGL calibration (for gantry printers)
Z-tilt adjust	Run Z-tilt calibration
Nozzle clean	Execute your cleaning macro

These options modify the G-code on-the-fly — if you disable “Auto bed level” but your G-code contains BED_MESH_CALIBRATE, HelixScreen comments it out so it doesn’t run.

Tip: Pre-print options remember your preferences per slicer. If you always run bed mesh before PrusaSlicer prints, that preference persists.

Starting a Print

Select your file
Review and set pre-print options
Tap Start Print

The UI switches to the Print Status panel automatically.

During a Print

Print Status Panel

The Print Status panel shows:

Circular progress indicator with percentage
Time elapsed and time remaining
Current layer / total layers
Filament used — live consumption updated during printing
Filename and thumbnail

Print controls:

Button	Action
Pause	Parks nozzle safely, pauses print
Resume	Continues from paused state
Cancel	Stops print (confirmation required). By default, waits for the printer’s cancel routine to finish. If Cancel Escalation is enabled in Settings > Motion, an emergency stop triggers automatically after the configured timeout.
Tune	Opens Print Tune overlay for real-time adjustments

View Toggle (Progress / Complete)

When the G-code viewer is active during a print, a small floating button appears in the top-left corner. Tap it to switch between:

Progress view (default): Shows layers printed so far in solid color with a faded “ghost” preview of unprinted layers above.
Complete view: Shows the entire finished object with all layers solid — useful for seeing what the final print will look like.

The icon shows a cube (tap to see the complete model) or stacked layers (tap to return to progress view). The toggle resets automatically when a new print starts.

If the print contains multiple objects, an objects list button also appears in that corner; the view toggle shifts to the right to make room.

Timelapse Toggle

If the Moonraker-Timelapse plugin is installed, a timelapse button appears in the print controls. Tap it to enable or disable recording for the current print. The button shows a camera icon and toggles between “On” and “Off” states.

During printing, frame captures happen automatically based on your timelapse settings (per-layer or time-based). When the print finishes, the video renders automatically if auto-render is enabled.

Print Tune Overlay

Access by tapping Tune during an active print.

Parameter	Range	What It Does
Speed %	10-300%	Overall print speed multiplier
Flow %	75-125%	Extrusion rate multiplier
Fan %	0-100%	Part cooling fan speed

When to adjust:

Speed %: Slow down (50-70%) for intricate details or if you see layer separation. Speed up for large infill areas.
Flow %: Increase (105-110%) if you see gaps between extrusion lines. Decrease (95-98%) for blobs or over-packed lines.
Fan %: Increase for better bridging and overhangs. Decrease or disable for ABS/ASA to prevent warping.

Note: Tune adjustments are temporary and only affect the current print. The next print uses your slicer’s original values.

Z-Offset / Baby Steps

Fine-tune your first layer height while printing:

Adjustment increments:

-0.05mm / -0.01mm: Nozzle closer to bed (more squish)
+0.01mm / +0.05mm: Nozzle further from bed (less squish)

Signs you need to adjust:

Symptom	Problem	Fix
Lines not sticking, curling up	Nozzle too high	Tap -0.01 or -0.05
Rough first layer, scratching sounds	Nozzle too low	Tap +0.01 or +0.05
Gaps between lines	Nozzle too high	Tap -0.01
Elephant foot, ridges	Nozzle too low	Tap +0.01 or +0.05

Saving your Z-Offset:

Get the first layer looking good
Tap Save Z-Offset to write to Klipper config
Future prints use this as the starting point

Tip: Make small adjustments (0.01mm) and wait for the printer to complete a few moves before judging the result.

Pressure Advance Tuning

If your printer has Pressure Advance configured:

Tap Tune during a print
Find Pressure Advance section (only visible if PA is enabled in Klipper)
Adjust the value

Typical values by material:

Material	PA Range
PLA	0.02 - 0.06
PETG	0.04 - 0.10
ABS/ASA	0.03 - 0.08
TPU	0.10 - 0.20