Refer to the machine tool builder's manual for the number of digits commandable with address T and the correspondence between the T codes and machine operation.
It takes the single chip microcomputer AT89C51 as the control nucleus, uses digit controlled current to control running of weighbeam, adopts infrared technology to check the balance of weighbeam.
Another problem of minimality also remains unsolved—to wit, what is the smallest number of digits a puzzle maker can place in a starting grid and still guarantee a unique solution?