How to configure wipe tower and flush volumes

Wipe towers and flush volumes help multi-color prints switch between filaments cleanly. The wipe tower gives the printer a place to purge, while flush volumes control how much material is purged when changing from one filament to another.

When the wipe tower appears

The Cloud Slicer shows a wipe tower helper when the active plate needs one.

The wipe tower or prime tower setting needs to be enabled, and the active plate needs to use at least two extruders or another mode that requires a tower. The Cloud Slicer also hides the wipe tower during paint mode and preview mode.

If the wipe tower does not appear, the current settings may not require it, the tower may be disabled in slicer settings, or the active plate may only use one filament.

Move the wipe tower

When the wipe tower is visible, drag it to a clear area of the active plate.

Keep it away from models. If the wipe tower overlaps models or generated paths, slicing can fail with a G-code path conflict or wipe tower overlap warning.

The slicer stores wipe tower positions per plate, so each plate can keep its own placement.

Why flush volumes matter

Flush volume controls how much filament is purged when switching from one filament to another.

Higher values can make color transitions cleaner, especially when switching from dark to light colors. Lower values can reduce waste, but may leave old color in the nozzle.

Open flush volumes

1. Configure at least two filament slots.
2. Use Bambu Studio or OrcaSlicer.
3. Open the Filaments sidebar.
4. Click the droplet button for flush or purge volumes.

Opening the dialog enables custom flush-volume values for the slice request. If you never open the dialog, the Cloud Slicer sends no custom flush matrix.

For useful values, select the real filament and slicer filament profile for each slot before recalculating. The table can fall back to slot colors and default settings, but it cannot know your intended material behavior if the filament setup is incomplete.

Edit the matrix

The flush-volume table is a from-to matrix.

• Rows are the filament you are switching from
• Columns are the filament you are switching to
• Same-filament cells are not editable
• Values are shown as effective purge volume in mm3

Change the value where the transition needs more or less purging.

Use the multiplier

The multiplier scales the effective values shown in the table. The multiplier is limited from 0 to 3.

Use a lower multiplier to reduce purge volume across the table, or a higher multiplier if multiple transitions need more purging.

Recalculate values

Use Re-calculate to rebuild the matrix from the current filament colors, filament profile settings, nozzle setup, and printer settings.

This is useful after changing filament colors, filament profiles, nozzle setup, or machine settings that affect flushing.

Related articles

• Multi-color and multi-material printing in the Cloud Slicer
• How to assign colors and filament slots to a model
• Fixing "G-code path conflicts" slicer errors
• How G-code preview works after slicing

Updated on: 26/05/2026