Machining odd shapes on a denford starmill

[FatFreddie]

trigger.cb (the .b1 file is just a backup) looks pretty good - have you tried machining it?

You could replace the two circles (imported as polylines) with CamBam ones but it should work ok as is.

The drill MOP needs to be deeper than the material by a couple of mm.

You might want to put some holding tabs in the profile.

The triangular pocket won't be too accurate with a 6mm cutter but it's probably only there to save plastic so I wouldn't worry about it.

The feed rates are very low - 25 for plunge is ok but 200 - 300 (or more depending on your machine) would be better for cutting otherwise the tool will rub and wear quickly. What are you using as a controller? It should allow you to alter the feed rate as you cut so you can start off slowly. It should also show you the tool path so you can check that it's sensible.

For test runs I often use MDF and a router cutter or an old slot mill. For the very first runs you can just cut in air with your finger on the emergency stop button if you're not too sure about it :)

You can get a better picture of the part by rotating the view in CamBam (alt + left mouse button by default)

I've attached a copy of the file that I've had a quick go at to demonstrate some of the above.

Mark