Needle Cutter Tool for CNC machine

This design is for a needle cutter for a CNC machine.

Needle cutters are useful for cutting accurate designs in 5mm thick paper-backed foam board commonly found in art and craft shops.
In the UK these sheets are commonly available at the Hobbycraft stores.

Foam board is especially useful for making cheap radio controlled aircraft.

In addition to foam board, I have tested this cutter on corrugated cardboard amd thin card as used for cereal boxes along with thin balsa sheets.

This needle cutter should fit in a standard CNC spindle holder but as the original design files are available you can modify it as needed for any machine.

The principle of operation is that a fine needle is moved up and down very fast as the head moves across a workpiece. You generally need a minimum of 10 to 15 strokes per mm of movement.

This design uses 0.6mm diameter piano wire.
In the UK, piano wire is easily obtained from B&Q stores and online.
Look for the Diall brand in UK hardware stores.
The exact