HELP Buring Wood withTS

Shecky wrote:
> Happy Holidays
>
> I could use the group's help. I've been experimenting with finger (box)
> joints using my tablesaw and Freud stacked dado blades.
> I've been using a 1/4" stack to dado 1/4" wide, 3/8" high finger joints
> through 1/4" plywood. Every cut burns the wood and lets
> off some pretty serious smoke and stink. I've tried slow feed and moderate
> feed to control the quality of the dado cut and not
> overwhelm the motor. Tips of the dado blades getting a rusty color to them
> as well. Its not rust as I baby them and keep them
> safely stored when not in use.
>
> Is plywood susceptible to burning? Am I killing my saw and blades? Any
> advice to cut these joints correctly is greatly appreciated
>

Don't ask me how I know this, but you will get those results if the
blades or chippers are on backwards. Plywood tends to stink anyway,
and chip on the cross-cuts, but it shouldn't be burning. My Freud dado
cuts clean as a whistle with no burning ever.

DonkeyHody
"Friends may come and go, but enemies accumulate."

Shecky wrote:
| Happy Holidays
|
| I could use the group's help. I've been experimenting with finger
| (box) joints using my tablesaw and Freud stacked dado blades.
| I've been using a 1/4" stack to dado 1/4" wide, 3/8" high finger
| joints through 1/4" plywood. Every cut burns the wood and lets
| off some pretty serious smoke and stink. I've tried slow feed and
| moderate feed to control the quality of the dado cut and not
| overwhelm the motor. Tips of the dado blades getting a rusty color
| to them as well. Its not rust as I baby them and keep them
| safely stored when not in use.
|
| Is plywood susceptible to burning? Am I killing my saw and blades?
| Any advice to cut these joints correctly is greatly appreciated
|
| Here are my tool specs:
| TS Craftsman 10" (model 315-228390)
| 1-1/2 HP induction motor developing (?) up to 3HP
| 3600 RPM
| 13 amp
|
| Freud 8" , 12 teeth, stacked dado blade (SD 208)

[1] Make sure cutters are sharp.

[2] Feed faster - not slower - to avoid burning. If necessary, use a
sacrificial board behind the stock you're cutting to minimize/prevent
tearout.

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto

DonkeyHody & all the group

Thx for such fast and nice replies. I won't ask you about the backwards
blades if you promise to delete my posting. My blades were on backwards.
Too many blade swaps on the saw today and I didnt pay attention.

Then I used all your advice (fater rate of feed, backerboard to reduce
tearout) and all is great. Like a hot knife through butter.

Too bad. I already planted the seed with SWMBO that I needed a full sized
cabinet saw with greater power. So lets let this be our secret. For now
I'll just stick with my Craftsman..until the next mistake I make.

Thanks again and Happy New Year!


"DonkeyHody" <[email protected]> wrote in message
news:[email protected]...
>
> Shecky wrote:
>> Happy Holidays
>>
>> I could use the group's help. I've been experimenting with finger (box)
>> joints using my tablesaw and Freud stacked dado blades.
>> I've been using a 1/4" stack to dado 1/4" wide, 3/8" high finger joints
>> through 1/4" plywood. Every cut burns the wood and lets
>> off some pretty serious smoke and stink. I've tried slow feed and
>> moderate
>> feed to control the quality of the dado cut and not
>> overwhelm the motor. Tips of the dado blades getting a rusty color to
>> them
>> as well. Its not rust as I baby them and keep them
>> safely stored when not in use.
>>
>> Is plywood susceptible to burning? Am I killing my saw and blades? Any
>> advice to cut these joints correctly is greatly appreciated
>>
>
> Don't ask me how I know this, but you will get those results if the
> blades or chippers are on backwards. Plywood tends to stink anyway,
> and chip on the cross-cuts, but it shouldn't be burning. My Freud dado
> cuts clean as a whistle with no burning ever.
>
> DonkeyHody
> "Friends may come and go, but enemies accumulate."
>

"Shecky" <[email protected]> wrote in message
news:[email protected]...
> Happy Holidays
>
> I could use the group's help. I've been experimenting with finger (box)
> joints using my tablesaw and Freud stacked dado blades.
> I've been using a 1/4" stack to dado 1/4" wide, 3/8" high finger joints
> through 1/4" plywood. Every cut burns the wood and lets
> off some pretty serious smoke and stink. I've tried slow feed and
> moderate feed to control the quality of the dado cut and not
> overwhelm the motor. Tips of the dado blades getting a rusty color to them
> as well. Its not rust as I baby them and keep them
> safely stored when not in use.
>
> Is plywood susceptible to burning? Am I killing my saw and blades? Any
> advice to cut these joints correctly is greatly appreciated
>
> Here are my tool specs:
> TS Craftsman 10" (model 315-228390)
> 1-1/2 HP induction motor developing (?) up to 3HP
> 3600 RPM
> 13 amp
>
> Freud 8" , 12 teeth, stacked dado blade (SD 208)

Might be side loading a bit. Not unknown for a miter gage to creep or a
pair of hands to allow the board to creep. How's the fit, otherwise?

I use the router and a spiral bit. Tablesaw jigs always seemed too fussy.
http://www.routerworkshop.com/boxjoints.html Easily made jig. Recommend
old laminate flooring for the base, UHMW plastic for the fence(s).