Crazy wicked swirl with TS55

fshanno

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Sep 20, 2007
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1,064
Okay, I'm cutting along, minding my own business, trimming a 3/4" thick German beech panel with my 55 and the Festool universal blade and wammo-powee this happens.

[attachimg=1]

This is a picture of the offcut which was about 1/2" wide off a rail and style side panel for a refrigerator surround that is 32x93.  I was trimming the style that butts against the wall as the first step in scribing.  The the cut was well supported and the 106" guide was clamped to the panel and the panel was in turn clamped to the cutting platform.  I can find no defect with the guide, looks straight and true.  The off cut looks quite a bit worse than the keeper side but it is still pretty bad.  The cut is not great to start with, some fairly prominent swirls.

I knew something had happened because it made a tinny wang sound, sort of a ting or something like it.  I didn't stop because it was cutting fine, no burning, no struggle.

I can't find anything wrong with the saw.  There's a small amount of side to side play in the plunge but that's be so for a long time.  There doesn't seem to be any wobble at the arbor.  The blade is not pristine, there's a bit of buildup of gunk but not terrible.

It's not the end of the world in this case because I was about to hit the panel with a belt sander to get down to the scribe line.  Yes, a belt sander because I haven't sprung for a RAS yet. 

This is not the only time it's happened but it is by far the worst case.  I've had the universal blade on for a long time because I haven't done any serious plywood cutting in several months.  Nothing feels broken, I went on and trimmed panels for a dishwasher and for a trash compactor later in the day and nothing like this happened.

Haven't talked to tech support yet because, as I said, it just doesn't feel like anything is broken.

 
WarnerConstCo. said:
loose a carbide tip?

Nope, all 28 teeth present and accounted for and none look damaged in any way.  Blade isn't bent or warped.

It's really weird.  Like I said it was just ZINGO and there was this one lone very nasty indentation at single point along a 93" cut line.  And I clearly heard it happen, one very distinct solitary "zing" sound amid the normal whiny sounds a 55 makes.  I think I felt it as well, not as pronounced as the sound.  About 2/3 of the way through the cut.

 
It is as if a large chip momentarily became wedged between the blade and your material...    [eek]
 
Didja switch hands in the middle of a cut? Is the saw adj to the rails to eliminate slop? Did ya sneeze???
 
I have had the same experience with the 48 tooth blades from time to time and have never really been able to find out exactly whats going on.    My guess is that the blade gullets become clogged which causes the blade to heat up and sort of wobble in the cut.    I have cut mdf board that pinched the blade and that caused the exact same problem.  I would really like to know whats really happening.
 
The thing that seems most logical to me is what Corwin already said, probably something got caught up in the blade for a sec.
 
Alex said:
The thing that seems most logical to me is what Corwin already said, probably something got caught up in the blade for a sec.

?+1? maybe?
 
No slop, the saw is set up pretty snug in on the guide.  I had the vac attached and dust collection was good. 

The chip idea is plausible but very spooky.  If that's the case then there may be no way to prevent the occasional occurrence.  Then again it could be the species.  I'm about to do a hard maple job and I'm sure to need trim some doors.

What about a poll, has this ever happened to you, sort of thing?

 
Hi,

I have had that or similar happen. It has been so rare and (mysterious?) that I atribute it to flukes of one kind or another. Corwin's wood chip theory being one  possibility. Others are -

Momentary let up on down force on the saw allowing a slight pop up  in the plunge.

Shifting direction of your wieght pushing either away from or towards the rail. This can move the plunged blade enough to do something like that .

It was a narrow off cut , it could have moved enough , got zinged by the blade and pushed back out.

Seth
 
If you are worried about chip-out with your maple, take a cut 1mm or so to the right of your line, and then shift the guide rail over to do a clean-up pass. Or take a shaving with a hand plane. I have found that my TS55 does not leave me an acceptable cut line with solid woods, so I always clean up the edge with a hand plane.

 
I guess it was just meant to be a mystery...LOL.

I have had identical problems with a table saw (very rarely)  and have always thought it was because of heat buildup on the blade which causes metal to do weird stuff.    No flat piece of metal will remain flat when enough heat is put on it. 
 
I get the same thing when using a the universal blade a lot when cutting the thick or hard woods. That's why i don't like them the Tenyru blade does the same thing. Happend today when i was ripping some pine 2x4's. I try to avoid blades with 24 teeth or less the 48 tooth blades work just as fast as long as their sharp and clean  and you don't get that wild blade vibration.
 
Taos said:
I know whats wrong and what caused this. PM me.

With well over 500 view on this thread, I fail to see why you would not post what you think here.  This is a user forum, after all...
 
festooltim said:
I get the same thing when using a the universal blade a lot when cutting the thick or hard woods. That's why i don't like them the Tenyru blade does the same thing. Happend today when i was ripping some pine 2x4's. I try to avoid blades with 24 teeth or less the 48 tooth blades work just as fast as long as their sharp and clean  and you don't get that wild blade vibration.

I use a Tenryu combo blade and have not had that problem. Ive cut ply and 3/4 oak hardwood with it.
 
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