The tension can be from the way the.
Wood ripping machine.
Rip saw machine has variable feed optional or can be designed for.
The table saw makes quick and accurate work of milling wood down to workable sizes.
Ripping wood means feeding the material along the grain of the wood through the blade to make a cut along the length of the wood.
If the 8 4 bows as it being ripped on the tablesaw then most likely it is tension in the wood and the same thing would happen if ripped with a bandsaw.
We have showed variety of wood ripping machines from 5mm thickness to 120mm or as per requirement.
If you are looking at buying a machine dedicated to ripping lumber even up to 3 look at a ripsaw.