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Table saw alignment issue

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Forum topic by CoryS posted 12-06-2018 03:03 AM 405 views 0 times favorited 9 replies Add to Favorites Watch
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CoryS

5 posts in 845 days


12-06-2018 03:03 AM

Something very strange is happening with my table saw. I go to set my fence, I measure between the inside of the saw blade and the fence, I get 27 1/8”. Exactly what I need. I turn on the saw and make the cut. However, after I make the cut – the piece comes out about 3/32” too long.

I checked all alignment and everything seems to look good. It seems to me that if something on the table saw were out of alignment, I’d most likely get a cut that is too short – not too long.

Does anybody have any ideas on this? The saw is an old Craftsman 113 contractor saw. The blade is a general purpose thin-kerf Freud blade.

-- Cory


9 replies so far

View sawdustjunkie's profile

sawdustjunkie

391 posts in 1920 days


#1 posted 12-06-2018 03:14 AM

You should check the distance from the front and back of the blade to see if it’s the same.
You could put a long straight edge along the side of the blade facing the fence and then measure where the distance from the front edge of the table and the back edge of the table, to the edge of the straight edge. The distance should be the same!

-- Steve: Franklin, WI

View Richard Lee's profile

Richard Lee

199 posts in 978 days


#2 posted 12-06-2018 03:20 AM

Check your tape measure.

View HokieKen's profile

HokieKen

7130 posts in 1341 days


#3 posted 12-06-2018 01:56 PM

See if you can move your arbor by hand. Is the cut square to the surface referenced on the table? It’s possible that when you turn the saw on, the force pulls on the arbor and kicks the blade out. If that’s the case, it may also be pulling it off square. If that’s the case, it could be a loose bolt, a broken part or just worn out bearings.

-- Kenny, SW VA, Go Hokies!!!

View johnstoneb's profile

johnstoneb

3060 posts in 2375 days


#4 posted 12-06-2018 02:39 PM

x1 hokieken

I would check the arbor bearings. It sound like you might have and arbor with endplay allowing the blade to move away from the cut under load.

-- Bruce, Boise, ID

View WhyMe's profile

WhyMe

1073 posts in 1764 days


#5 posted 12-06-2018 03:11 PM

I assume this is sheet goods you are cutting? Is the fence locked tight at the rear and not flexing?

View rwe2156's profile

rwe2156

3171 posts in 1683 days


#6 posted 12-06-2018 03:24 PM

Check the trunnion bolts and arbor run out.

-- Everything is a prototype thats why its one of a kind!!

View mathguy1981's profile

mathguy1981

83 posts in 107 days


#7 posted 12-06-2018 04:02 PM

If you just read this, it will tell you (with pictures) of ways you can check your fence-to- blade situation.

http://woodgears.ca/table_saw/fence_micro.html

He’s a bit technical but this is how I tune my fence.

-- Two thumbs and counting

View CoryS's profile

CoryS

5 posts in 845 days


#8 posted 12-06-2018 06:45 PM

Thanks so much for the feedback everyone!

Once I get home tonight, I’ll continue to look into it further. An issue with the arbor makes the most sense. Cuts are coming out perfectly square, they’re just a hair too long. If the arbor is being pulled when the motor kicks on, it makes sense that the cut if too long if the blade is being pulled off by a hair.

-- Cory

View Charlie H.'s profile

Charlie H.

295 posts in 853 days


#9 posted 12-06-2018 10:06 PM

If the cuts are repeatable it’s unlikely that anything is moving.
Most fences have a sight glass that can be set so measurements between the blade and the fence are not necessary.
When I set the sight glass on the fence I just made a short rip cut and then set the sight glass so it matched the width of the cut.

-- Regards, Charlie in Rowlett, TX --------I talk to myself, because sometimes I need expert advice.---------

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