Question: I have seen videos related to cutting circles on a table saw. I would love to try this but I am hesitant to make a jig that, to me, seems to be extremely dangerous. [Here is a video](https://youtu.be/z-xhYnWDCd0?t=33) of Matthias Wandel using his jig to cut a rabbet into the circle, which seems like it'd be even scarier.

How does one make this jig and do so safely? Are there any gotchas that should be considered when executing this jig?

Answer: 
I'm of the same mind, Peter. All the plans I've seen require removal of too much safety equipment. 

There are too many other tools that would suffice- from a band saw for smaller circles to a jig saw or router on a commercial or shop made trammel for large ones.

e.g.

Band saw-
![band saw circle jig](https://i.stack.imgur.com/fyBVj.jpg)

Or router..
![Router circle jig](https://i.stack.imgur.com/gS2EE.jpg) 

Or for a jig saw..

![jigsaw](https://i.stack.imgur.com/hu0rj.jpg)
Trying to cut finished circles on a table saw is about as unsafe an idea as I can think of. The reason that the Wandel setup works is that the rabbet is not much deeper than the tooth depth on the blade. This means that any wood fed into the blade at an angle encounters teeth and gets cut.

For any cut deeper than the tooth depth, this invites disaster. Wood which is fed into the body of the blade at an angle will do one of two things: if the blade is moving downwards, the wood will burn due to friction and the piece will stall - if the blade is moving upwards, the piece will be picked up and thrown. 

Neither is a good idea.