In this video I built a mini cnc kit and tested it with wood, acrylic, aluminium and fr4 pcb material.
Banggood 3018 Mini Cnc Router Kit https://www.banggood.com/custlink/K3mKbMkHyf
ER11 collet holder https://www.banggood.com/custlink/DDK32OntlI
(To install the collet holder, heat it up and tap it onto the spindle motor shaft)
End Mills 1 – 3mm https://www.banggood.com/custlink/KG33MjQ54p
22mm surface planing bit https://www.banggood.com/custlink/vGvE8OZoK2
(Use with an ER11 6mm collet for spoil board surfacing)
https://github.com/trasz/grblControl
http://easel.inventables.com/
http://flatcam.org/
Other mini cnc videos:
Eleksmill https://youtu.be/MG5BQI3h6Ek (Best for pcb milling)
3018-MX3 https://youtu.be/N2UOCccnewE (For Mach3 software)
source