Stuart wrote on 08/03/2010 09:32:
In ,
wrote:
which interestingly has a 0.8mm crown; I'm not convinced this is a good
idea - surely a flat table with a flat plate is the best??

The principle behind it is that when you have the weight of a heavy router
pulling down underneath it becomes flat. If you start flat you are likely
to finish up with a slightly dished effect unless you have a nicely ribbed
bit of cast iron or Al.

Yikes - that's a bit hit or miss then as it would depend on the weight
of the router; presumably there should be different amounts of crown for
different routers!
More importantly, with a 6kg router how much deflection should one
expect in a standard sized ~9"x12" insert?

thanks,
graham.