CNC Digital Knife & Acoustic Fabrication

Acoustic PET Felt Baffle & V-Groove CNC Vector Guide

Learn how to engineer multi-layer DXF vector toolpaths for CNC oscillating knife cutting and precision V-grooving of 9mm, 12mm, and 24mm acoustic PET felt panels, 3D faceted acoustic tiles, and suspended ceiling baffles.

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1. The Mechanics of Acoustic Felt V-Grooving

Recycled PET acoustic felt (polyethylene terephthalate) is dense, porous, and non-woven. Rather than milling with rotary endmills (which cause fiber melting and fuzzing), felt is processed using CNC oscillating digital flat knives and angled V-cut blades (Zünd, Kongsberg, Summa, Colex):

Hinge Skin Retention: A 45° double-bevel knife plunges to a precise depth leaving 1.0mm to 1.5mm of intact backing felt. This un-cut layer acts as a flexible, indestructible living hinge.
Origami 3D Folding: The panel can then be folded into hollow triangular baffles, rectangular ceiling clouds, or geometric acoustic wall facets with seamless razor-sharp outer corners.

Skin Thickness Rule: For 9mm felt, retain 1.0mm skin. For 12mm felt, retain 1.2mm skin. For 24mm felt, retain 1.8mm skin. Calibrate your Z-zero against the cutting underlay mat with a micrometer test strip.

2. DXF CAD Layer Hierarchy for Multi-Tool Cutters

// Standard DXF Layer Schema for Acoustic Felt Fabrication: Layer 1: LAYER_VGROOVE_90 (Color: Magenta) - 45° V-Cut Blade, Z-Depth: (Thickness - 1.2mm) Layer 2: LAYER_VGROOVE_60 (Color: Cyan) - 30° V-Cut Blade for triangular geometry Layer 3: LAYER_THROUGH_CUT (Color: Green) - Oscillating Flat Knife (POT/EOT), Full Z-Depth Layer 4: LAYER_MOUNTING_HOLES (Color: Red) - Router / Drill for ceiling gripper aircraft cables

3. Preventing Vacuum Table Lift & Fiber Drag

Cut Sequence Ordering: Always execute V-grooves first while the full felt sheet retains maximum suction hold-down. Execute perimeter through-cuts last.
Overcut Compensation: Digital knife blades have a physical heel and toe length. Enable knife tangential lift and heel compensation at internal corners to prevent corner notch tears.

Convert Acoustic Baffle & Wall Panel Sketches to CNC Vectors

Send us your architectural ceiling plans, baffle elevations, or faceted tile sketches. We deliver clean DXF files with dedicated V-groove and through-cut layer separation.

Order Acoustic Felt Vectors (29 DKK)