Its hard to beat this price for 3D Cad/Cam which is free for hobbyist and startups making less than 100K per year.
https://www.autodesk.com/campaigns/fusion-360-for-hobbyists

It requires Window, but its free!

I know of a shop that is using Inventor now and they are moving a lot of their work to Fusion 360. The cost is a fraction of the Inventor price per seat.  Something like $800 per year for a commercial business.

I used it a couple of years ago to do some lathe parts and it was really easy.   The parts were designed, and G code generated in a day, and this was the first time we ever used it.   Mill code is more difficult than lathe code typically, but still, one day.  There was a lathe post that worked perfectly with LinuxCNC.

I understand that they have improved it a lot in the last two years as well.

Dave

On 12/20/2018 12:46 PM, Chris Albertson wrote:
On Thu, Dec 20, 2018 at 2:19 AM Les Newell <les.new...@fastmail.co.uk>
wrote:

Can your cad/cam program do that in 300 LOC? 100k LOC maybe.
  Who knows.  No one EVER reads the g-code or counts the lines.  I have some
files with a few million lines.

But here is another question:  Can you hand code a DB9 cut out in less than
6 minutes?   THAT is what matters.

And can you hand code a compound curve, like a small part for a human-like
prosthec hand?






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