Miter slot to blade at 45° angle....
I did not set the miter slot to blade at 45° when I set my saw up, just never cut 45° stuff until now....
So it is off, at 90° the blade to miter is at .001, love it but at 45° it is .014, way off.
The back of the blade is to the right by the .014, now to correct this I need to shim the back trunnion down.
I just don't understand this, is this not like just lowering the blade, how will this fix the problem?
I am getting this information for this site which is a very good write up on setting the saw.
http://www.americanwoodworker.com/bl...-tablesaw.aspx
2 Attachment(s)
What is happening, a diagram
Look at the image below. This is a side view. Think of the round thing as the blade, the bottom line as as a line drawn parallel to the trunion, and the top line marks the top of the table saw. In the first image, the trunion is aligned perfectly with the table top, the second one is so far out of whack that it would never have left the factory, but, the important thing to note is that if you are making a regular cut, it just does not matter at all.
Attachment 307220
Consider the first image (top), if measure the distance from the line parallel to the trunion to the line parallel to the table, it is the same distance. from the trunion line to the table line. This is not even close to true on the bottom image.
Now, what happens if you tilt the blade 45 degrees along the trunion? Remember, you are not tilting with respect to the table, you are tilting with respect to the trunion. I won't take the time to attempt to make a three-D rendering, but, if you want, I can take a photo to illustrate, but, the moment you tilt with respect to the trunion, you have a point where the blade is at the same height as the table.
Attachment 307221
First, consider the distance from the trunion to the table top. If there is a big distance from the trunion to the table top, the table exits the table far to the left of the trunion. If the trunion is close to the table top, the blade is at the same height as the table very close to the trunion. So, if the trunion near the back is higher than the front, then when you tilt the blade, the front of the blade will be further to the left than the back of the blade.