Machining Insulation foam

[Musht]

Compared to wood, how much should I increase the DOC, 40-50%?

Thanks

At risk of the blind leading the blind ;-) , am very much a beginner still, advantage of insulation foam is its dirt cheap,easily available and in case of error tool is liable to just rip through the foam rather than snapping in an expensive and frustrating manner...

Can also just surface down the foam sheet with a wide cutter if you have a foul up.

Remember to peel the foil off both sides.

Try going as deep as you dare to start with and backing off if its getting bogged down, foam dosen`t melt like plastics at the wrong speed , it just chunks and rips rather than cuts, beginning to understand what meant by cutting chips rather than bashing the material into submission.

Insulation foam is more at the aero side of bubbly than malteser grain, so a lot of what you are actually cutting is air.

hope this helps

Cheers
Adam