Control card loosen or stoppage. 2. Limit switch or data line stoppage, check the limit switch, if it has signal, if the line connected well. 3. Drive of equivalent axis stoppage, check the drive supply electricity or not, signals is normal or not. 4. Servomotor of equivalent axis stoppage, check the connecting line of the motor short circuit or not, if it is abnormal, change a motor please. 5. Check whether the connecting line between motor and driver is loosen or connected well or not. 6. Check whether the couping is broken or loosen. 7. Equivalent screw rod is broken or the screw of the screw rod stoppage. 8. Equivalent axis’s slide rod stoppage. 9. Driver’s subdivision, electric current are different from the software designed.