OK… I’m even more befuddled than usual. Have a Unisaw with a Biesemeyer fence. Since my move, I have a problem with cuts being out of parallel, and burning the edge. When ripping a long board for instance, the outfeed end gets progressively further off the fence (in other words, it’s as though the board was turning counterclockwise, standing at the feed end). I’ve tried all the tune up procedures I can find with no luck. The fence seems exactly parallel to the miter slots in the tabletop, and the blade measures parallel to the fence. Any other ideas?
PaulB
Replies
What are you doing you measrements with?
Either a dail guage setup or a "interference" measurement is the best.
The interference measurement uses something that is fixed lenght and use to get a zero fit from the front edge of the blade to the fence. Then move it to the back of the blade and check for any difference in fit.
Also mark a tooth on the blade and rotate the blade so that one tooth is used for the measurements.
Also check the bolts that hold the top and the trunions. Make sure that nothing is loose to shift around.
I've ben using the "interference" method Bill, and have done the "mark a tooth" test. Next I guess I'll be pulling the top off and poking around the innards... just what I need today. Think the client will mind edge banding that varies from 1/8 to 1/4? ;)
Thanks,
PaulB
Change the blade.
Change the blade.
Yup. Preferably to a dedicated rip blade. Freud's got a dandy.PAHS Designer/Builder- Bury it!
HAve you tried using a stabilizer against the blade?The secret of Zen in two words is, "Not always so"!
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Is the blade parrallel to the slots?
is the guide parrallel to the same?
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Check the arbor and the bearings.
Are we there yet ?
Paul,Occasionally a sawblade will seem true when still, but will deform at speed. Test for this by ripping a 1/4" slot into the end of a test board. Turn off the saw. Is the slot wider than the saw tips? If so, it's new blade time.Also, on some tablesaws the gyroscopic forces actually tilt the plane of the blade while running. If this is your problem, the test I gave above will tell you. Does the slot line up with the stationary blade when the test board is against the fence?Bill
Thanks Bill for the tip, it's an interesting one. I should've posted an update sooner, my apologies, I try not to leave a thread hanging. I thinkkkkkkk I got it straightened out (although I've thought that before). It seems like it was a cumulative effect of tiny (sub millimeter) errors in a few places that probably was worsened in the move. Went through every last piece a few times until I got every last rph of adjustment nailed down it it seems to be OK... I hope ;) Thanks again to all who posted.
PaulB