[Lab] Pen holder

[Adrian Jones]

Darcy,
The first thing that comes to mind is using an electromagnet in conjunction
with a small servo to secure the pen once it's been grabbed. So, the
sequence would be:
	- move the CNC head to just above the pen to use; 
	- activate the electromagnet to lift the pen into its holder; 
	- activate the servo to secure the pen in place;
	- release the electromagnet

Maybe, if the hook of one or more servos is strong enough, maybe you could
dispense with the magnetic attachment.

Regards,

... Adrian

PS. Here's my latest Spectralizer! Another excuse to use addressable LEDs.
http://woodsgood.ca/projects/