1, modify the parameters need to enter the password: MPARA.
2, 1002 system axes to set 3 or 4.
3, 1070 open the 4-axis to set 0 shutdown set 1.
4, 8201 open the 4-axis to set 0 shutdown set 1.
5, 2018 open the 4-axis set 0 off set 1.
6, remove the fourth axis without removing the driver just 1070-8201-2018 set 1.