Router speed?

[pixey]

Hi. I have a 1500w 1/2 inch router and intend to cut some masons mitre joints using a worktop jig.
Most of what I have read sounds pretty straightforward but one question I have is should the router be set at a very high speed to cut well or a slower speed?

Thanks.

Paul

 

[Jasonb]

Fast.

Jason

 

[pixey]

Thanks Jason.