Tabletop saw stops midway through chipboard
Examine the blade disk to see if it has become gummy or coated with resin. You may have to remove the blade and scrub it clean. 

If the saw is not new the blade may be quite worn and need replacement. 

The teeth of a saw are bent slightly to the side (usually every other tooth to each side) to make the cut wider than the saw blade. Sometimes a saw blade can seem sharp but the projections formed by the bent teeth are worn down, making the cut too narrow.