How to make a Top Mount or Under Mount Joystick Jig

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mikevangels:
*The router base slides along the top of the jig. With the bushing installed in the base and the straight bit installed in your router, set the router on top of the jig at the edge of your piece. Adjust your router's cutting depth. I left 1/4" of material left.*

Okay... so I'm a router novice... but with using one of these jigs how do you adjust the cutting depth?

Most of my router bits have a bearing on the bottom or top of the bit (though I'll admit I don't have many). So as an example, if my router bit is 1" long and the bearing is at the top, it will cut a 1" depth.

I have plunge router so I'm assuming I need a different type of bit? Or is this bushing something separate from the bit that attaches directly to the router?

*Edit* Bah... after a couple re-reads I think I've got it.

Timoe:
Yes, the bushing attaches to the router base directly. It has an edge the protrudes down that rides against the edge of your jig. The router bit is the plain "hinge mortise' type bit that does not have a bearing.

AtomSmasher:
Good stuff. Now I just need to go buy a router bushing so I can actually use this info. This thread should definately be stickied.

NiteWalker:
You don't absolutely need a bushing, you can also use what's called a pettern bit. Make your template out of 3/4" or 1/2" plywood instead of MDF. MDF's edges will compress from the router bearing. The math is simpler when using a pattern bit. The opening you see is what you get. Just make sure to get a pattern bit with a 3/4" cutting length. Any longer and it'll extend too far to make an appropriate recess for the joystick.

AtomSmasher:

--- Quote from: NiteWalker on August 19, 2006, 02:50:56 pm ---You don't absolutely need a bushing, you can also use what's called a pettern bit. Make your template out of 3/4" or 1/2" plywood instead of MDF. MDF's edges will compress from the router bearing. The math is simpler when using a pattern bit. The opening you see is what you get. Just make sure to get a pattern bit with a 3/4" cutting length. Any longer and it'll extend too far to make an appropriate recess for the joystick.

--- End quote ---
I'm guessing a pattern bit is basically just a flush trim bit with the bearing on the top instead of the bottom. Is that correct?

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