I used to flip my dresser wheel with a pencil so I would have a rolling start, and not go full off the dresser at the end of cross travel, and lift off the wheel, not go off with extending the cross off the end of the wheel width.
Increase wheel stock removal on the wheel and dresser center taking .oo1 on the cross infeed, and then taking .oo1 on the cross outfeed from about the center of the wheel. cross travel to about the last 1/16 of the dresser. The sound tells you of going off, don't go full off.
Yes, the dresser should not have axial or radial play / the brake should be slowing the dresser wheel...free-wheeling with a 7" wheel at 3400 RPM would have the dresser going about 8,000 RPM , way too fast.
(X)Some guys would start the dresser wheel with an air hose shot..I thought that was bad for the machine and the dresser.
(X)Going full off the wheel allows the dresser to restart on the wheel and so can chatter.
*Agree the pencil trick could be dangerous if one was not care full.