"mark" wrote in message
...
I find when ripping 1"kiln dried birch my blade does a bit of wandering. I
tried a 36 tooth flat tooth for ripping and a 40 tooth atb for comparison
and they both do it. Both blade a sharp. Is this normal, would blade
stabilizers help prevent this? Does not do it with pine.

If you are using a thin kerf blade consider stabilizers. Is the board flat?
Are you using feather boards in front of the blade? Is the fence parallel
to the blade?