reduce "chatter" when cutting - Scroll Saw Woodworking & Crafts Message Board

tonybell96 · 09-14-2009, 03:15 AM

I have been having trouble with my 3/4 in pieces. I have been having excessive chatter (piece bouncing up and down on the blade). Is there a trick to preventing this?

thanks!

Janette · 09-14-2009, 03:19 AM

what size blade are you using? I use a #7 . Sometimes you just have to hang on

Jim McDonald · 09-14-2009, 03:24 AM

Stupid question, but I have to ask?

Are the teeth pointing down? That can cause some tremendous chatter. Everyone gets one in upside down or even backwards every now and then.

waynemn · 09-14-2009, 03:29 AM

I usually get the chatter when cutting 3/4" hardwoods using #7 or #9 blades with reverse teeth, and making turns. Cutting straight is OK. Blades without reverse teeth I have fewer or no chatter problems.

waynemn

tonybell96 · 09-14-2009, 04:53 AM

I was using #5 RT blades, it only happens with the 3/4 in wood, which is what I am using when making puzzles..

wood-n-things · 09-14-2009, 05:00 AM

Quote:

what I am using when making puzzles..

Puzzles...Perk..Puzzles..lets see pics...drooling in anticipation...

STEVESSAWSHOP · 09-14-2009, 02:52 PM

Odds are it's not the blade if your project is jumping off the table. Most often it will be the saw. If a saw can't keep constent tension when it is cutting this will cause this problem. I don't know what saw you have but if you have a bad bearing, this will create a change in tension on every stroke the saw makes. Check to see if you have blade whip or blade flutter side to side motion of blade running at high speed. If you have every under tension a saw and cut with it, the blade will grab the wood and chatter on the table. To get a clean smooth square cut, a saw must keep exact tension WHEN IT'S CUTTING. One question are you breaking blades alot.

Peter Wright · 09-14-2009, 03:59 PM

FWIW

The only time I have had this problem so far is when pushing the feed rate too quick.... I had a trivet 3/4" oak that chattered to hard I stuttered for about ten minutes. "Polished" the back of the blade, Slowed the feed down, and kept the wood firmly against the table, no more problems.

Upside down blade will definately do it tooo LOL BTDT

lucky788scroller · 09-14-2009, 07:46 PM

Another huge factor is your wood itself. Does it sit flat on the table? If it is cupped, bowed, or twisted, as you cut and move your hands holding the wood, your downward pressure on the wood will cause it to bind the blade a little and could cause it to "chatter" .Check to see if your wood is perfectly flat to rule out that possibility.And, is it possible you are just trying to go to quickly?

keystonecop · 09-14-2009, 07:59 PM

Quote:

I was using #5 RT blades, it only happens with the 3/4 in wood, which is what I am using when making puzzles..

Make sure you keep a constant downward pressure on the wood, especially when making turns. The wood seems to bounce more when making sharp turns.. Move the wood slower when making turns.

Hope this helps.....Post some Pictures of you puzzles.

09-14-2009, 03:15 AM	#1
tonybell96 Junior Member Join Date: Jun 2009 Posts: 20	reduce "chatter" when cutting I have been having trouble with my 3/4 in pieces. I have been having excessive chatter (piece bouncing up and down on the blade). Is there a trick to preventing this? thanks!

09-14-2009, 03:19 AM	#2
Janette Intarsia Moderator Join Date: Oct 2006 Location: Eugene, Oregon Posts: 2,110 Blog Entries: 4	what size blade are you using? I use a #7 . Sometimes you just have to hang on __________________ Janette www.square-designs.com

09-14-2009, 03:24 AM	#3
Jim McDonald Workin' for the Weekend Join Date: Jun 2008 Location: On the Other Side of the Monitor Posts: 946 Blog Entries: 6	Stupid question, but I have to ask? Are the teeth pointing down? That can cause some tremendous chatter. Everyone gets one in upside down or even backwards every now and then. __________________ Jim Exuberance can be corrected; dullness is incurable. --E. Deters "Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

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09-14-2009, 03:29 AM	#4
waynemn Member Join Date: Mar 2005 Location: Rochester, MN Posts: 38	I usually get the chatter when cutting 3/4" hardwoods using #7 or #9 blades with reverse teeth, and making turns. Cutting straight is OK. Blades without reverse teeth I have fewer or no chatter problems. waynemn

09-14-2009, 04:53 AM	#5
tonybell96 Junior Member Join Date: Jun 2009 Posts: 20	I was using #5 RT blades, it only happens with the 3/4 in wood, which is what I am using when making puzzles..

09-14-2009, 02:52 PM	#7
STEVESSAWSHOP Member Join Date: May 2009 Location: Missouri Posts: 69	Odds are it's not the blade if your project is jumping off the table. Most often it will be the saw. If a saw can't keep constent tension when it is cutting this will cause this problem. I don't know what saw you have but if you have a bad bearing, this will create a change in tension on every stroke the saw makes. Check to see if you have blade whip or blade flutter side to side motion of blade running at high speed. If you have every under tension a saw and cut with it, the blade will grab the wood and chatter on the table. To get a clean smooth square cut, a saw must keep exact tension WHEN IT'S CUTTING. One question are you breaking blades alot. __________________ Rbi Hawk 220 Rbi Hawk 226 Rbi Hawk G426 Dewalt

09-14-2009, 03:59 PM	#8
Peter Wright Junior Member Join Date: Feb 2009 Posts: 23	FWIW The only time I have had this problem so far is when pushing the feed rate too quick.... I had a trivet 3/4" oak that chattered to hard I stuttered for about ten minutes. "Polished" the back of the blade, Slowed the feed down, and kept the wood firmly against the table, no more problems. Upside down blade will definately do it tooo LOL BTDT

09-14-2009, 07:46 PM	#9
lucky788scroller Senior Member Join Date: Sep 2005 Location: wisconsin Posts: 6,260	Another huge factor is your wood itself. Does it sit flat on the table? If it is cupped, bowed, or twisted, as you cut and move your hands holding the wood, your downward pressure on the wood will cause it to bind the blade a little and could cause it to "chatter" .Check to see if your wood is perfectly flat to rule out that possibility.And, is it possible you are just trying to go to quickly? __________________ Dale w/ yella saws