XY cutting problem/surface finish

I got problem on 4020 machine

This is finishing problem when I make a cut in straight line

The finish is o.k.

But when I make the cut with two axis together

I got wavy finishing
did somebody had problem like this

i checked resolver-borads-gibs
and tune amps!

What cutting parameters were you using?A light hobby machine can't be expected to operate at the sort of speeds and cutting depth that an industrial machine would be comfortable with.

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Originally Posted by routalot

What cutting parameters were you using?A light hobby machine can't be expected to operate at the sort of speeds and cutting depth that an industrial machine would be comfortable with.

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3500rpm
.1 amount
feed=850mm/min

The material is?

Quote:

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Originally Posted by routalot

The material is?

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i cleaning boards and reseating all boards
problems fixed
cutting is ok and mirror finish obtained