Two things I don't know.

[Small Slick]

I know that my band saw leaves a layer of sawdust stuck to the pine that I have been sawing. I think the saw dust in the humidity amplifies water marks and mold activity.

What I don't know is should I be sweeping and blowing off all the saw dust before I sticker and stack the boards, or does it not matter?


The other thing I don't know is why my band sawed flat and true on a red oak after it was beginning to get wavy after sawing 6 white pine logs 8 footers about 20" on the small end.   It was my first oak on the mill. I thought I would use the old band to open the log up as it was a yard tree. I never did change the blade I ran it a little slower than the pine but it was really nice and flat lumber. Why would this be?

John

[terrifictimbersllc]

I think it is because the difference in hardness between the knots and soft wood of pine is much greater than that in oak. The blade deflects when it comes to the harder knots and returns in the softer portion, leading to waves. Yours is my experience too, that 20" pine requires a very sharp band, and the same band that starts to give waves in pine would still continue to cut oak for much longer.  That is, most equivalent or smaller diameter oak.  Some oaks especially white oak  very wide and the least bit dried out will be just as difficult to keep flat as knotty pine. 

[barbender]

Yes, you want to get that sawdust off of your boards. I use a drywall taping knife to scrape it off. X2 on what terrifictimbers said.

[WDH]

Sawdust on the boards slows down the drying. 

[Banjo picker]

And seems to mold worse.  Banjo

[Small Slick]

It makes sense now that my feet are wet that the boards will turn out better with effort taken to remove the saw dust from them. I can see this first hand.

I was really surprised when the blade I was ready to change on EWP worked so well on the red oak!  Not at all what I expected. 

John.

[Bibbyman]

The topic title, "Two things I don't know".

You're lucky,     I can think of a lot more than two things that I don't know.    And there are probably things I don't know that I don't know that I don't know.  Then there is a long list of things I use to know but now forget.   And probably some things I know that are probably not right.  :D

[schakey]

The topic title, "Two things I don't know".

You're lucky,     I can think of a lot more than two things that I don't know.    And there are probably things I don't know that I don't know that I don't know.  Then there is a long list of things I use to know but now forget.   And probably some things I know that are probably not right.  :D

say_what I didn't know that

[Magicman]

But I know that Bibby is right.    ;)

[Bibbyman]

But I know that Bibby is right.    ;)

Just ask me something I don't know and I'll make something up and sware it's right!

[Magicman]

So I guess that questions about stuff that we do not know about are the easiest to answer.   

[SawyerBrown]

But I know that Bibby is right.    ;)

Just ask me something I don't know and I'll make something up and sware it's right!

"I'll tell you the truth whether I know it or not!"   ;D

[Magicman]

I told you more than I know already.   

[WDH]

To know is to be.  To don't know is to have been. 

[POSTON WIDEHEAD]

To know is to be.  To don't know is to have been.

Old saying.

[WDH]

It will be in time. 

[thecfarm]

And some things I know,I have forgotten.

[red oaks lumber]

the thing i know is i don't know

[WDH]

What are you, a Philosopher?

[Magicman]

I know that you believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant.  (old saying)

[mesquite buckeye]

Yes, you want to get that sawdust off of your boards. I use a drywall taping knife to scrape it off. X2 on what terrifictimbers said.

This comment got me to thinking about the sawdusty boards issue. Also makes them uglier and harder to sell as RS.

I think a garden hoe, especially one a little on the dull side would give a better scraping angle and you wouldn't have to bend over even if the boards are at ground level. ;D The edge would have to be straight across and the blade not bent for it to work well, but I think a little grinder work and a vice would quickly fix that problem even on an old one. ;D


Oops, forgot picture. Here it is.

  

 

Here is an old/new hoe I picked up at a tool store auction probably 30 years ago. It was left in a shed with a leaky roof, hence the surface rust. :( Never used, still has a square cutting edge that was never sharpened. 10" wide, big enough to clean up any board or slab in short order. ;D ;D ;D
There is still an AMES sticker on the handle, but I don't know if they still make this one, which will be heading out to Big Mesquite this weekend. ;D ;D ;D 8) 8) 8) 8) 8) 8) 8) 8)

[sandhills]

I don't know a lot, but what I......ah never mind, that pretty well sums it up.

[dboyt]

The other thing I don't know is why my band sawed flat and true on a red oak after it was beginning to get wavy after sawing 6 white pine logs 8 footers about 20" on the small end.   It was my first oak on the mill. I thought I would use the old band to open the log up as it was a yard tree. I never did change the blade I ran it a little slower than the pine but it was really nice and flat lumber. Why would this be?
John

If pine pitch builds up on the blade it will cut every way but straight.  The oak, depending on when it was cut and how dry it is can actually wipe the blade clean and it will start cutting straight again.  Might check for that.  A lot of people use some Pine-Sol in their lube to help keep the blade clean.

[beenthere]

Also makes them uglier and harder to sell as RS.

Come to think of it, I don't know RS...  :

[hackberry jake]

My first guess would have been tooth set. If a blade has lost some set it will cut red oak fine and it will wave in pine. Like WDH said, if pitch builds up on the body of the band it acts just like the blade doesnt have enough set.