Addressing the questions about what feeds to use when milling the boards, we decided to throw together a little table with feed recommendations for the tools Cirqoid uses to mill and drill PCB laminate. These are the values that worked well for us. Happy milling!

Drills

Drill bits are only used to drill holes. They are supplied with green stop rings.

Drill diameter	Feed
0.2-0.3mm	250 mm/min
0.4-4.0mm	300 mm/min
4.0-5.0mm	200 mm/min

 

15º milling end mills

These end mills are used for isolation milling.

End mill diameter	Feed XY	Feed Z	Feed arcs
0.1mm	75 mm/min	50 mm/min	30%
0.13mm	150 mm/min	75 mm/min	30%
0.18mm	400 mm/min	150 mm/min	30%
0.254mm	1000 mm/min	300 mm/min	30%

 

90º V-tools

90º V tools are also used for isolation milling. They come with orange stop rings.

End mill diameter	Feed XY	Feed Z	Feed arcs
0.10-0.15mm	300 mm/min	100 mm/min	30%
0.2-0.5mm	800 mm/min	300 mm/min	30%

 

Rub out end mills

As the name suggests, these end mills are used for rub out (removing large areas of copper). Their stop rings are purple.

End mill diameter	Feed XY	Feed Z	Feed arcs
0.4mm	800 mm/min	250 mm/min	30%
0.8-2.0mm	1000 mm/min	300 mm/min	30%

 

Contour end mills

And these end mills separate the board from the laminate panel. They have yellow stop rings.

End mill diameter	Feed XY	Feed Z	Feed arcs
1.0-2.0mm	300 mm/min	100 mm/min	50%