Check out these engraving cnc pictures:
Installed on eggbot 2

Image by oskay
Engraving tool for Eggbot. Related blog post right here.
Driver board with pen arm

Image by oskay
Engraving tool for Eggbot. Connected blog post here.
CNC Machining China Company
Check out these engraving cnc pictures:
Installed on eggbot 2

Image by oskay
Engraving tool for Eggbot. Related blog post right here.
Driver board with pen arm

Image by oskay
Engraving tool for Eggbot. Connected blog post here.