Electronics > Mechanical & Automation Engineering

Which bit to buy on Ali for PCB Engraving

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MacIntoshCZ:
Hello i would like to buy some bits for PCB engraving. I have found this V shape bits
https://www.aliexpress.com/item/32959720140.html?spm=a2g0o.cart.0.0.7acf38daF5IpIG&mp=1
This could be used for traces with low width isolation, but which bits shall i use for isolation of power traces on AC side? There should be a lot of isolation and engraving with 0,1mm will be time demanding. I am beginner into CNC. What do you use? Thanks for help

E-Design:
You will learn that for bits that last and have best performance, cannot be found on aliexpress. There is a direct correlation to cost and performance, keep this in mind.

also, its ok to isolate larger areas with a smaller bit. this may take less time than the act of changing out a bit for a larger one.

MacIntoshCZ:
I agree that quality cost more, but since i am newbie i am still learning.... I just crushed one bit when probing heightmap becouse i forgot to connect probe to the bit...  |O

beanflying:
Given you are sort of in the area take a look at https://wegstr.com/30-spiral-carbide-engraving-bit for a good choice of better quality ones.

The split dBit styles typically sold on AliX or Evilbay like you linked are not ideal for a quality result.

There are similar bits on AliX and I got a stash of these try initially or to tweak the grind on and try with a finer tip https://www.aliexpress.com/item/4000071321616.html?

E-Design:

--- Quote from: MacIntoshCZ on August 21, 2022, 08:02:38 am ---I agree that quality cost more, but since i am newbie i am still learning.... I just crushed one bit when probing heightmap becouse i forgot to connect probe to the bit...  |O

--- End quote ---

Yep, that happens! guess thats a  good use for the cheap bits.. learning the machine and process!

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