SGS 1/64 Carbide End Mill - PN# 30191
I bought one of these to day, and could not even sit it down flat on
the PCB. It snaped without even putting a mark on the board, and under
praticly no pressure, it cost me $23.00, and they said that I must have abused it because it broke.
What’s up with these things, I need to mill tight traces on a PCB, and it looks like this is the only thing I can use to go that thin.
Any advise ?
Thanks for the advise, I need small end mills so I can continue my project.
I'm new to this, and really don't know what to use.
I really beleve there was somthing wrong with the SGS, I know these are fragle but this one really broke way to easy.
I'm trying to mill PCB's that have small traces on them, and I need
an end mill that will hold up and not snap. (As much as possiable)
Last edited by deleteallusers; 06-20-2007 at 11:45 AM.
Harvey tool makes a couple of different endmills just for plastics both abrasive and non.
I can't say about carbide 0.0156" endmills but I can about 0.0156" carbide drill bits. They snap in half if you even look at them cross-eyed. They are extremely fragile parts that will break with only an ounce or so of side-load.
I have had great luck with these.
I oopsed it and did a rapid thru the circuit board.. Just cut a nice slot. at around 20Krpm and 100ipm.
Looks like you really have a nice CNC machine, mine is DIY.
What kind of machine do you have ?
Do you have sensors on the pressure foot, that feedback to
your software and autoadjust the depth of the cut ?
I would like to do somthing like that, but I dont have sensor feedback,
You can almost see through the board and read the computer screen.
The 0.015 ball endmill I used before was acutaly pretty tough,
but they all seem to break in the same place and snap completly off,
I have now purchased a few Robbjack SS-2-015 STUB length 2 flute
end mills, I hope they hold up as I set them down on the board.
I must set Z depth manualy as I dont have any sensors.
I'm using real thin copper stock, it seems like it should push through the
material before it would break, the material is FR4 - 014 THK PCB
ah - no.. The machine is a limp noodle. <- technical term. But it does ok. I am using emc2 and have a touch off switch for setting tool length.
It gets the job done.. I would love to get a smaller micromill or such to do my circuit boards.. being able to cut into the 20ipm range would be nice.
Wow, I wish I could get results like that.
I think I need to try that touch off switch idea.
I'm also thinking about a simple vacuum setup for holding my material.
I should say - I use the 1/16 end mills for clearing and Mechanical etch bit (0.0625" carbide spiral flute, 60 degree triangle tip
cutter) from the same company for isolation milling.
Ua... How do I setup a touch off switch ??
Is it hard, I can figure out how to setup my software,
but... how do I do the switch ?
Thanks much for all the help, I think I'm getting closer to success.
I need to... my boss is starting to show his fangs...
Update: I can't really find anything specific on a touch off switch setup.
Could someone advise me on adding this feature ?
Last edited by deleteallusers; 06-20-2007 at 11:21 PM.