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Just cleaned and checked my Table saw alinementand ?????

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Forum topic by sandhill posted 09-13-2010 10:56 PM 956 views 0 times favorited 11 replies Add to Favorites Watch
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sandhill

2128 posts in 3387 days


09-13-2010 10:56 PM

Topic tags/keywords: question tablesaw

I picked up a new 10” blade today for my table saw and replace the part that holds the splitter guide so after cleaning out the saw and lubed the trunnion gears with dry lube then I decided to get out the dial gauges and digital angle gauge. The blade rotation is off about 3 thousandths which could be the blade its a diablo from Home Depot and I don’t think its a major problem but when I checked the fence it was out 10 thousandths right at the arbor so at each end it returns to “0”. It is a Biesemeyer fence and I don’t think it was that way when I got it, its been a year since I did an alignment and I would have picked that up. Any ideas on how to correct this??? Or is this acceptable? My thought is if its out 10 thousanths what will the discrepance be on a 4, 6, or 8 foot cut .


11 replies so far

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PurpLev

8523 posts in 3112 days


#1 posted 09-13-2010 11:03 PM

the problem that I see from your description is not so much the poor cut that you’ll get over long boards, but the fact that your boards can bind against the blade causing kickback and some serious injury.

if you have a bies fence you should be able to shim the center of the fence faces with some paper cards to get it to 0 all the way across the miter slot.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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sandhill

2128 posts in 3387 days


#2 posted 09-13-2010 11:08 PM

PurpLev the bow gos ( this way I don’t see any adjustment Let me check the bottom. And you are right about the binding concern.

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sandhill

2128 posts in 3387 days


#3 posted 09-13-2010 11:14 PM

OK here’s the deal, I took off the end plug thing and looked down inside and the outer guide is fastened with self tapping screws and what looks like Formica is glued over it the only fix I see is to attach a sacrificial fence and calibrate it.

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PurpLev

8523 posts in 3112 days


#4 posted 09-13-2010 11:32 PM

oh wow. interesting. I thought it was some sort of sliding mechanism that locks it in place like the HTC fence face attachment mechanism (you can see it on their website).

although regardless, an aux fence would also accomplish the same fix, though might take more work (should the original faces DO have a way to come off)

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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sandhill

2128 posts in 3387 days


#5 posted 09-14-2010 01:12 AM

Unfortunately it does not come off I will have to destroy the face and take the self tapping screws out then do what ever I need to make it right. My guess is that even though it is sealed from the front and has a hard rubber or some other material as a sort of bumper I think the Humidity must have made the plywood swell over the last 3 years, or plywood is being plywood and had that imperfection when it was made and they felt it was close enough. I am sure the T-Slot in the table is exact because I checked it.
I will look at the HTC and maybe I can come up with something that will be good or better.
Thanks

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sandhill

2128 posts in 3387 days


#6 posted 09-14-2010 01:25 AM

I have been doing all this in preparation for when my new drum sander comes so I can get back into building the bed room set so I was just killing time. Using a steel 24 inch rule with graduations to 1/64th I did some test cuts and it seems to be dead on and right on the mark, I even did a tendon and it was perfect as well, anyway I will sand a piece of hard maple on the drum sander and see if I can shim and clam it to the fence and if its good I will seal it with a finish and see if I can mount it.

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Mogebier

170 posts in 2496 days


#7 posted 09-14-2010 01:49 AM

My brain exploded over you being concerned by 1/10000 of a discrepancy.

-- You can get more with a kind word and a 2 by 4, than you can with just a kind word.

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sandhill

2128 posts in 3387 days


#8 posted 09-14-2010 03:19 AM

One thing I forgot to do was measure diagonally! When I cut a 12 inch square It is 1/64” off, when and when I cut a 16” long board 8” wide it is over 1/16” out of square. I am making frame and panel sides for my night stands and it looks like the project is on hold till I get this saw and everything else squared up. I had to come inside because it was driving me so crazy. I checked my good square and its off 1/32”. I have a compound miter saw with a digital read out and it does not match any of the other things I check it against. I guess the first thing to do is square the square so I can check to see if I am close on both the fence and the miter saw then make my cuts and measure every thing tweaking as I go! I don’t know how I got everything so screwed up.

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PurpLev

8523 posts in 3112 days


#9 posted 09-14-2010 03:38 AM

Mogebier – not one ten thousands (1/10000) but ten thousands as in 10/1000 = 1/100, thats quite a bit of a derivation.

sandhill – sounds like too many things are ‘getting out of alignment’ – I’d stop, and address them one at a time, – as you said, start with the square.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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sandhill

2128 posts in 3387 days


#10 posted 09-14-2010 06:20 AM

Ok I could not sleep until I figured this out.
I cleaned the arbor and where the blade gets tightened then I checked the blade again from both T-slots and the blade is with in .002 at 180 degrees and .0001 at the same tooth at 180 degrees so I know that is good.

So next I checked the T-slot to the fence, starting at the front (feed side) the fence is .002. Moving into the blade where the cut starts its .000, at the out feed exiting it is .007 so effectively the cut is .007. out of square. I would assume that it is more from the end of the T- slot because the fence extends about 6” past the table. I am disappointed in the Biesemeyer fence I only had it for 3 years and took very good care of it, it must be the plywood or the covering they used. I guess I will see if I can get some of that 1/4” nylon or what ever it is they sell at woodcraft and attach it to the old fence and shim it using my dial indicator. What a pain.

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PurpLev

8523 posts in 3112 days


#11 posted 09-14-2010 06:29 AM

blade seems good – fence seems not as bad as originally posted.. but still seems out of flat – I would contact the supplier that you got the saw from, or the mfg. it is obviously a defect that cannot be manually tuned.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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