How to cut an angle greater then 90 on a miter saw?

Question

IF YOU DIVIDE THE ANGLE SAY 135 AND WE GET 67.5 HOW DO YOU MAKE THE CUT USING A MITER SAW WITH NO MORE THAN A 50 DEGREE ANGLE

Answer 1

It seems you could rotate your piece 90 degrees and take the reciprocal of the angle. Or you can probably use some sort of jig.

Answer 2

We are talking about a circle, so there are always two degrees that are of the same just on opposite sides of the circle.

Draw a circle, put a dot in its center.
1. Draw a straight line right across that circle ( through the center Dot, and across both ends).
2. One end is a measure of 0 degrees, and the opposite end is 180 degrees, but they really are the same. Which means, if I cut a piece of wood 0 degrees, and one at 180 degrees I will end up with the same cut. It is just the direction I am going that is different.

3. Now if I draw a line straight up and down across the entire circle. I have a 90 degree point, and a 270 degree point. Again each is on opposite sides but this is the same cut and it is only the direction you travel that makes a difference. So if I have a piece of wood and cut a 90 degree cut I place it in the position it will be used to make my cut.

However, if I wanted to make a 270 degree cut I would have to travel in the opposite direction, or relatively travel in that direction. This means, by reversing my board so I am cutting in the opposite direction on the board I will accomplish this while still cutting on the 90 degree point.

In other words, I can use any regular measure to make that cut or reverse my board so I am traveling across the board in the opposite direction while still using the same measure on my saw - and I'll have the opposite cut angle when the board is right side up.


To your problem, the 67.5 is from zero degrees. This is distance that is again, relative distance. So you can rotate your board downward so that what was zero degees on the board is 45degrees lower. In other words do it this way.
1. insert the board and mark zero degrees
2. rotate the board so this mark is 45 degees lower than the zero. This means, there is 45 degrees between this mark and zero now. Now, you only need to cut 22.5 degrees from the zero.

All of these measures are relative to each other, by manipulating the board you can acheive any angle - you just might have to approach it from another direction.

If in doubt then draw the circle and mark right on the board the angle you need and cut it directly. This is what I'd do - its easier in the end.
If this is something you'll be cutting often then make a " Jig" on the angles of
135 degrees on the upper end, and 315 degrees on the lower end. Now just place your board against it so that the board angles up toward the 135 degree angle.

Notice on a circle the 315 degree angle is 45 degrees below zero degrees.
Using this jig you only need to align the board and cut it on 22.5 degrees in the saw.

Answer 3

If your 50 is certain cut a scrap at thet 50. Use this under or along the fence. Now you have 51-100.

Answer 4

Answer number 1 actually has a clue that would be SAFE at least, if not millimeters close in accuracy. She stated "Jig". A "TOOL" cut in the greater or lesser of the total angle you wish to achieve, subtracted from or added to the finite angle of your saw, clamp the TOOL to the saw, and place the piece to be cut, perhaps after Lining it, on the saw table against the TOOL, then cut.

Certainly testing with scrap, and some minor trial and error should get you to where you need to be.

Steven Wolf