I need to cut irregularly shaped holes in plastic (probably polyethylene or flexible PVC).
The nasty thing is that the holes need to be 1 cm (1/3 inch) (ideally even 2cm) but sometimes as narrow in places as 0.5mm (a little more than 1/64 inch).
What kind of cutting bit could do this, and how?
I've seen drill bits this narrow, and I don't mind using an approach of drilling many contigous small holes instead of sideways routing. But I worry that because drill bits are conical at the tip, if the holes overlap too much the tiny drill bit will bend into the existing hole rather than cutting a new one.
I'm totally new to the world of cutting bits and CNC. If I knew the right terminology I could google more on what sizes were available, but I don't ...
Tiny, deep, cutting bits anyone???
LAser, except you don't want to do the PVC in a laser