I don't think CNC is off-topic, but that question asked specifically:
My question is that is there a software that could read an AutoCAD design or any DWG file and produce a CNC program for 2D profiling? Preferably at free of cost. (Broke student here) Thanks in advance.
From the Q&A is Hard, Let's Go Shopping post that Ben linked (and is in the standard closing template):
Here’s one way to ask:
Q: What’s the best low light point-and-shoot camera?
A: Canon S90 and Lumix LX3.
Here’s another way to ask:
Q: How do I tell which point-and-shoot cameras take good low light photos?
A: I strongly recommend looking for something with
- a fast lens (2.0 at least)
- reasonable ISO handling (at least 400, but preferably 800)
- the biggest sensor available
The sum of these factors are really critical for low light situations.
The former question provides the path of least resistance: a laundry list of products I can buy without thinking about it too much. But that answer will only be valid for a year at best. The latter question may take some thinking, but its answer will be valid forever … or at least until camera technology somehow shifts beyond lenses and sensors as we know them today. Thus, when it comes to shopping questions, don’t ask us what you should buy — ask us what you need to learn to tell what you should buy.
If I had to summarize our network in a single word, that word is “learning”. People come to our sites to learn about topics they are passionate about. As the old Chinese proverb goes, “Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.” Every question and answer ultimately should be about teaching and learning — yes, even the shopping ones.
So it's not that questions about CNC are off-topic, but that the OP for that question asked for free software. It wasn't a question about how a CNC machine builds a command queue, or what kind of code runs a CNC machine, it was a question that OP could have just
googled instead. The number two result there for me is the list of free software you provided in your answer.