The 3D printed CNC Plotter Penholder is a specialized attachment designed to convert a CNC machine into an accurate plotting device. It mounts onto a 62mm spindle motor (2.2kW) and accommodates a standard ballpoint pen mine. The penholder features a spring-loaded mechanism using the ballpoint pen’s spring to maintain consistent pressure, even on uneven surfaces.

Key Features:

• Compatibility: Fits a 62mm CNC spindle motor, commonly found in 2.2kW systems.
• Pen Integration: Uses a standard ballpoint pen mine, ensuring easy replacement.
• Spring-Loaded Design: Provides consistent contact with the surface, compensating for unevenness.
• 3D Printed Construction: Features durable 3D printed components with threaded assembly for secure and adjustable fitting.
• Quick Installation: Enables fast mounting and easy adjustments, enhancing CNC versatility for plotting tasks.

This penholder offers a practical and efficient solution for precision plotting, enhancing the functionality of your CNC machine.

External Hardware:

• 2x M4 Nut
• 2x M4 x 20mm Screw
• Ballpoint pen mine + spring

Notes:
The mine of some ballpoint pens sometimes differ a little bit in diameter. The holes in the holder are tight for accuracy. So if the first one does not fit nicely, try another one. Or alternatively you can widen the hole a little bit with a drill.

For storing you can find the gridfinity insert here: