Take a look at the elevator, i.e. get in the traphouse with the pull cord, stay clear of the machine, operate the machine. Watch the target drop onto the elevator, elevator needs to (when down) be flush with the target table, this is probably where you are getting the chip. I could go on but call Pat-Trap, They will send you the procedure to clean the elevator. Also, early machines had hydraulic elevator operation, later ones, "G's" are mechanical, check the springs, 1 extention spring and at the bottom a compression spring.
Also the manual will tell you how to set the tension on the roller plates, you need to re-set it, and for good measure replace the 4 roller o-rings if they are not fresh, the o-rings can cause this type of problem.