I’ve been trying to cut a simple miter for the sides and ends of a box. 3/8″ x 4″ material.I am using a 10″ contractors saw which checks out square with the blade vertical. When I roll the blade over on a 45, I get a convex curve on the right side and, of course a concave cut on the matching left side? Any ideas? I have tried this on several different pieces including plywood of the same thickness and width.
Discussion Forum
Get It All!
UNLIMITED Membership is like taking a master class in woodworking for less than $10 a month.
Start Your Free TrialCategories
Discussion Forum
Digital Plans Library
Member exclusive! – Plans for everyone – from beginners to experts – right at your fingertips.
Highlights
-
Shape Your Skills
when you sign up for our emails
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. -
Shop Talk Live Podcast -
Our favorite articles and videos -
E-Learning Courses from Fine Woodworking
-
-
Replies
Is it flat? If not, the bow/warp/etc will show up magnified on a miter cut. The other possibility is that the cut is closing up at the end of the push past the blade.
The first pieces were ever so slightly cupped. However, I switched off to some plywood which was flat and it repeated
Well,
The plywood "should" be reasonably flat (although I have erred by assuming so in the past). My next guess would be a problem with the flatness of the table itself? What shape is the blade in? (a forced cut will cause the blade to actually wobble during the cut and don't ask why I know this!) Is the arbor on the saw true? At worst, you may have to cut long and shoot the miters with a LA block plane.
Rob
Thanks for your input guys. I am leaning towards too quick of a feed with insufficient down force. I checked the blade for flatness and it is dead on. I think thee piece mustbe riding up on the top of the blade a little.
This forum post is now archived. Commenting has been disabled