CNC

Security-rules

1. You must have taken the CNC-course by Chalmers Robotics to run the CNC-mill
2. Always follow the Checklist

Specification

Brand	Optimum
Modell
Max-X-travel	ca 480 mm
Max-Y-travel	ca 128 mm
Max-RPM	ca 3000 ( vid hög växel)
Max-Jog-speed	1500[mm/minute]

CNC Milling calculating-rules

RPM [Revolutions per Minute]

• RPM = M / Tooldiameter

Material	RPM
Polrycarbonate	20000
Aluminium	10000
Nylon	7000
Steel	5000

• A typical RPM could be 3000

Feed-rate [mm/minute]

• Feedrate = K * ToolNumberOfTeeth * RPM
• K is a teeh-strok in the material
• K is usally 0.05
• K is maximum of 0.2
• K defines how fine the cut should be
• A typical Feed-rate could be 300

Plunge-rate [mm/minute]

Små fräs (3mm)

Plunge-rate = 20% av Feed-rate

• No more than 100