Follow

I bought a CNC mill recently to prototype PCBs with a turnaround time on the order of hours instead of weeks. But I've been having a hell of a time getting the isolation routing to come out clean.

After a long story, it turns out the V-bits I've been using are just poorly machined! Inspection under a microscope shows all kinds of issues. It's so bad I'm tempted to write a blog post about it, if anyone's interested.

· · Web · 1 · 0 · 0

On a related note, anyone have a good source for quality CNC tools in the US? 😀

Apparently the ones I bought off the internet are garbage. If I'm lucky, 3 out of the 10 bits will actually be usable for isolation routing.

@cuchaz From what I know the cheap ones online tend to be used ones from factories. Keep that in mind when searching.

@gudenau That would explain a lot.

Although the biggest defect I'm seeing is the bits aren't very true. Meaning the cutting tip of the V is very off-center and cuts a much wider and rougher path than it's supposed to.

Is that a typical wear pattern for a used bit?

@cuchaz I don't know, I have done very little research into the topic. Some of the cheap ones could just be rejects or poorly made as well. There is a lot of ways for things to get into the supply chain, especially for an individual consumer.

Sign in to participate in the conversation
Mastodon for Tech Folks

This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!