I was not getting perfect result when tilted my saw to 45. i was getting a bellied or concave cut. I could never figure it out. i did some searching on lumberjocks and redddit and the best advice was slow down your cut or you might have messed up teeth on the blade.
i was curious about the blade part. if you took slow cuts, how would a wildly ground tooth cause a concave surface? i'm just not buying it.
recently, I saw a youtube video on by stumpy nubs on aligning the table saw and started messing around. i have the blade within 2 thousandths front to back, using a dial indicator that rides my miter slots.
Stumpy then takes it an extra step and checks the blade front to back when tilted at 45 degrees. i did that and found out that the back of my blade was slightly lower than the front. Since i can't raise the back, i have to lower the front.
as stumps suggests for my delta contractor type saw, i go in and shim the trunion bolts where they attach to the underside of cast iron table. i just cut up some feeler gauges after bumbling thru some math.
so i have the blade within about .002 at 90 and .004 at 45. seems like i'm ready.
i make some test cuts at 90. dead on.
when i tilt to 45, i get a cut that is CURVED! a slight curve but i can see it nontheless.
my quality checks:
i test my stock. not bowed.
its freshly planed square.
i'm holding it down with a clamp so its not shifting.
tried two blades to put this blade teeth idea to rest.
i use full kerf blades so i believe blade runout is minimal.
arbor runout measures 1 thou
it cuts heavier at the front of the cut and curves to a point.
obviously there is some odd geometry going on with the tilt but my brain is fried. anybody encountered this?
i was curious about the blade part. if you took slow cuts, how would a wildly ground tooth cause a concave surface? i'm just not buying it.
recently, I saw a youtube video on by stumpy nubs on aligning the table saw and started messing around. i have the blade within 2 thousandths front to back, using a dial indicator that rides my miter slots.
Stumpy then takes it an extra step and checks the blade front to back when tilted at 45 degrees. i did that and found out that the back of my blade was slightly lower than the front. Since i can't raise the back, i have to lower the front.
as stumps suggests for my delta contractor type saw, i go in and shim the trunion bolts where they attach to the underside of cast iron table. i just cut up some feeler gauges after bumbling thru some math.
so i have the blade within about .002 at 90 and .004 at 45. seems like i'm ready.
i make some test cuts at 90. dead on.
when i tilt to 45, i get a cut that is CURVED! a slight curve but i can see it nontheless.
my quality checks:
i test my stock. not bowed.
its freshly planed square.
i'm holding it down with a clamp so its not shifting.
tried two blades to put this blade teeth idea to rest.
i use full kerf blades so i believe blade runout is minimal.
arbor runout measures 1 thou
it cuts heavier at the front of the cut and curves to a point.
obviously there is some odd geometry going on with the tilt but my brain is fried. anybody encountered this?