I want to cut a nice looking round pocket in aluminium.
It's for my friends volume knob in a front panel of his HiFi equipment.... i'm not sure this is a good idea.
I think there is a little play in my Kress ball bearings, maybe because the upper part is made of plastic and it's not that stiff, but the spot, where the endmill is plunging into the material, is cutting a bigger hole then the diameter of the bit. It's like cutting a small "dog bone".
The pocket must be 32mm in diameter and 7mm deep.
I would like to cut first 31,8mm pocket and then remove the last 0,2mm at full depth.
But I don't want the endmill to plunge at 32mm.
Ramp is a vertical move, but I'm looking for something like " horizontal spiral ramp", cutting from inside and out, at full depth, as the last step.
Can VCP do that?
I was also thinking of using a fish tail bit. Maybe it's not dancing around so much when plunging, as an endmill which can not drill does.
I attach a picture. You can clearly see at which of the four corners of the rectangle the start point is.
Normaly the holes I'm cutting are not visible, but the volume knob pocket will be, because it's 2mm bigger than the knob.