Crosscutting endgrain on a bandsaw

[LeoinTR]

Can anyone help me understand why I'm getting these scalloped patterns, and possibly how to eliminate them? I am using an 18-in Laguna with a fairly new blade. Good dust collection, slow feed rate, and the blade guides are dialed in.
My best guess is that the pitch from this pine (kiln dried to %7-9), and the polyurethane glue in the tracks is causing the blade to deflect. Any thoughts will help in this will be much appreciated.

 

[mquan01]

There are many threads related to this, but blade tension, blade TPI and feed rate are the biggest culprits

 

[Rwe2156]

Pretty much this ^^^^, but also could be inherent in the saw and quality of blade.

Feed rate also is a factor.

Bottom line, you're not gonna get a perfectly clean cut on any bandsaw, even with a carbide blade.

 

[LeoinTR]

There are many threads related to this, but blade tension, blade TPI and feed rate are the biggest culprits

Thanks for responding. The reason I'm asking the forum is that I've addressed these and other possible issues I could think of. Most of the cuts I get are very clean and straight, like the ones in this photo. Perhaps it's just an issue with the material, and I just need to keep running the problem children through the drum sander.

 

[Mike Davis]

A new blade will stretch, sometimes a lot, when first installed and less each time it is used until it reaches its sweet spot. Your cut looks to me like the blade has some flutter, try a little more tension in small increases until the flutter goes away. Bob is right you may not ever get a perfect cut, but I think you should get better than this.

 

[LeoinTR]

A new blade will stretch, sometimes a lot, when first installed and less each time it is used until it reaches its sweet spot. Your cut looks to me like the blade has some flutter, try a little more tension in small increases until the flutter goes away. Bob is right you may not ever get a perfect cut, but I think you should get better than this.

Thank you. I'll give that a shot.

 

[ErinJ]

How slow is your feed rate? Most of the time, when it comes to wood, speed and feed rate are a bit faster.