Mazak VTC-160A, Maintenance Manual, Page: 91 / 96

6-17
6-5 Test Run
6-5-1 Checking the Machine before Starting Test Run
1. Make sure that the lifting fixture and the shipping brackets are all removed.
If the machine is operated while they are still attached, the machine will be damaged.
2. Make sure that there are no missing parts or accessories.
3. Make sure that the centralized lubrication unit tank is filled with the specified lubricating oil to
the specified level.
4. Make sure that the hydraulic unit tank is filled with the specified oil to the specified level.
5. Make sure that the spindle cooling fluid unit tank is filled with the specified oil to the specified
level.
6. Make sure that the hoses and cables of the circuits for hydraulic, pneumatic, and coolant
circuits are correctly connected.
7. Make sure that the coolant tank is correctly placed.
8. Make sure that the connection to the air source is correct.
6-5-2 Electric Inspection before Switching the Power ON
1. Check the phase sequence of power supply
If the NC power is switched on while the phase sequence of power supply is incorrect, trouble such
as runaway of the machine and blowing of fuses will occur. Therefore, under no circumstances
switch on the NC power until the phase sequence is confirmed to be correct.
A. Checking the phase sequence with the phase tester
Connect the phase tester to the transformer as shown in the illustration below (U
↔
R, V
↔
S, W
↔
T). The phase tester must show clockwise rotation.
Transformer
Phase tester
Fig. 6-1 Checking the Phase Sequence
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