Milling oak, preventing warp!

[organic guy]

Relatively new to milling, cut up 6 trees into planks and a 12" square beam.

At present have a large oak was wind blown 5 years ago, been cut into 3  for 3 years.

I am trying to cut some timber for a porch. 

Cut a 6" by 18" slab last night, about 12ft long. By the time I had cut to the end it had risen up by at least an inch on the end first cut.

Is there anything I can do about this, cutting technique or planning cuts around tree in a different order?

Thanks for your help.

OG

[Squaredy]

1 hour ago, organic guy said:

Relatively new to milling, cut up 6 trees into planks and a 12" square beam.

At present have a large oak was wind blown 5 years ago, been cut into 3  for 3 years.

I am trying to cut some timber for a porch. 

Cut a 6" by 18" slab last night, about 12ft long. By the time I had cut to the end it had risen up by at least an inch on the end first cut.

Is there anything I can do about this, cutting technique or planning cuts around tree in a different order?

Thanks for your help.

OG

I'm afraid there is a lot of luck to this.  I have been milling Oak for 13 years and I can't tell if a log has tension in before I mill it.  It is just one of those things that sometimes this will happen.  Best to avoid doing anything long - the longer your beam the worse this can be.

 

The other way to avoid it is to use the whole middle section of the log, so that in effect the log is the beam but squared off.

[Big Beech]

And choose the best quality of logs for such items.

Plantation grown timber that has equal stress throughout is likelybto be less prone to problem.

If the oak or any tree has grown on the side of the wind arrives such as a south westerly hedge row than you will get more stress and tension as the tree has grown to accommodate it

[Johnsond]

Hi All

just wondering if anyone had any experience of using woodmizer blades 4800 x 38, or have any recommendations??. 

looking at trying a few different types to see which works best on my Trakmet, the supplied X cut blades are leaving a great finish but not fast at all and very prone to deflection when cutting if pushed too hard. All settings and tensions are good and it’s happening with brand new bands !!. Spoke to an experienced guy on the forum and the saw dr I use with a view to getting them reset which I’ll do this weekend when first 20 go in to be sharpened. 
🤷‍♂️Just realised guys I’ve put this on the back of another post 🙄. Not concentrating and or multi tasking and failing miserably. 

Edited July 1, 2021 by Johnsond