I am breaking down some ½” Baltic birch ply for a shop cabinet and I cannot get a square crosscut.
The sheet is about 30 inches wide and my cut is out of square by about 1/64 inch, its shy on the leading edge of the cut.
I am using a Dewalt circular saw DW364 and a factory made aluminum cutting guide (which I have used successfully for more than 20 years).
Here is what I have tried to rectify the problem.
Checked my square by scribing a line, flipping it around and rescribing. It’s good.
Checked and re-aligned the sole of the saw to insure it is parallel to the blade (it seems to be good to about ½ a thou)
My cut is straight it is a good straight-edge and my cutting guide is straight.
I tried a different blade, same result, about 25 thousandth off on the leading edge.
Next – I made a cutting guide from two pcs of the ½ ply and used my saw to cut the edge of the guide.
When I checked that guide, it too was off from one end to the other, still a gap on the leading edge. I am sure that I am not having the saw at an angle when starting the cut.
There does not seem to be any play in the arbor, and I don’t know what the problem is at this point I have tried everything I can think of.
What am I missing?