What type bits for routing PCBs?

[cp8071]

What type bits should I be using for routing out Printed Circuit Boards? Currently I'm using an Engraving Spindle which uses 1/8" cutters. I've tried 0.005" and 0.010" bits and both have broken while cutting boards. These types of cutters have an angle to them (not like end mills) so setting the depth and width can also be difficult. I guess they are really only designed for cutting plastic, but I though that being carbide would be good enough for cutting copper/fiberglass.

What are you using?

CP

[alphatroniqu]

hi

check http://www.precisecut.com it have low cost pcb router bit ..

im use it every day and work verry nice

it also have pcb milling bit to

http://www.precisecut.com/products/f...I1.x=13&I1.y=8

[Jwallis]

Hello,

I use second hand dental burrs... They work really well and are plentiful at the local dentist. I have found that the trick is to plunge through the copper layer at a reasonable rate before giving any sideways motion. When I first started routing PCB's I had the bit skimming the copper and they broke without fail. Now that I plunge through the copper there is no problem. The most common bits I use are 0.6mm diameter and 0.8mm diameter and they work perfectly.

Hope you find some that work for you.

Regards,

Jayson
(Horsham, Australia)

[abasir]

Also make sure the spindle is running at high speed. Professional system runs in 20,000 rpm range.

[alphatroniqu]

hi

20,000 rpm is near of the minimum

on my system it set for 30,000 rpm

tool[14].name=Contour Router 2.0 mm (79 mil)
opt_rotation_speed=30000
opt_milling_speed=3 (one ink per 3 segond)

most of pcb shop run faster that this ...

for trace milling "Universal Cutter 0.2 mm"
opt_rotation_speed=40000
opt_milling_speed=0 (one ink per segond)

Ther tool data come from my Protomat C60 PCB milling

Marc Lalonde
Alphatronique