Re: Vibrations during CNC
 

Yea, 30 minutes. After doing a bit of looking, I think the bit is either dull or isn't designed for fast cutting. It looks like a simple 2-flute square end bit. Any recommendations? I know he has a couple of bits hidden somewhere so maybe I can get him to leave them out for me Saturday.

And I want to keep at least some of the scraps simply because this is only a prototype and the rectangles are perfect for fixing up some minor problems on an old bot.

Re: Vibrations during CNC
 

What brand/model machine is this?

You've got the right type of end mill. 2 flutes with a square end will work fine. It may have been dull already, or you may have run it so slow that it dulled it just cutting out your pockets.

30 minutes seems absurdly slow. Even the smallest CNC mills I've ever seen (the little Taig/Sherline ones) wouldn't take 30 minutes.

Re: Vibrations during CNC
 

End of Weekend update:

A brand new bit was put on the CNC and we learned that the spindle speed had to be manually adjusted. So after some fine tuning of the machine and refinement of the drawings, the machine cut the rectangles in under 5 minutes each. We wound up bolting the middle rectangle on the opposite end from the final cut and it worked out beautifully.

Pretty sweet!

Now we're off to scavenge parts off of an older bot to fix the '08 bot's problems.