7 GENERAL CHECKS AFTER INSTALLATION IN THE MACHINE (Page 17 / 22) HSD Spindle AT MT Series Installation, Operation and Maintenance Instructions and Precautions

______ HSD __________________________________________________________________________________

7 GENERAL CHECKS AFTER INSTALLATION IN THE MACHINE AND PRIOR TO START-

7.1 CHECKING ON THE ELECTRO-SPINDLE PRIOR TO START-UP

Positioning

• Make sure that there is sufficient space behind the electro-spindle’s cooling grill. (See data sheet)

Electrical connections

• Make sure that the electro-spindle’s earth cable or earthing terminal is connected to the machine’s

earth.

• Make sure that the signal from the motor’s PTC thermistor is suitably processed and connected in

series with the machine’s stop circuit.

Programming the inverter

• Make sure that the maximum supply voltage value corresponds to that specified on the electro-

spindle’s motor data plate. (See data sheet.)

• Make sure that the frequency value at maximum voltage corresponds to that specified on the electro-

spindle’s motor data plate. (See data sheet.)

• Make sure that the maximum frequency value corresponds to that specified on the electro-spindle’s

motor data plate. (See data sheet.)

• Make sure that the maximum continuous current value corresponds to that specified on the

electro-spindle’s motor data plate. (See data sheet.)

• Contact HSD S.p.A. if you need to check other inverter parameters.

7.2 CHECKING ON THE ELECTRO-SPINDLE AT THE TIME OF FIRST START-UP

• Run the electro-spindle briefly without load to warm it up (see section 8.2).

• Make sure that the draft of cooling air produced by the fan comes out from all four air channels in the

nose of the spindle.

• Make sure that the direction of rotation of the spindle shaft corresponds with the NC and with the

direction symbol on the body of the electro-spindle.

8 OPERATION OF THE ELECTRO-SPINDLE

8.1 CLIMATIC LIMITATIONS

Unless specified otherwise, all HSD electro-spindles are designed to operate within the following ranges:

• Altitude not above 1000 m above sea level

• Maximum ambient air temperature not above 40°C

• Minimum ambient air temperature not below –5°C

8.2 WARMING UP

Every day, when the electro-spindle is started up for the first time, leave it warm up slowly without load. This ensures that

the bearings reach their running temperature gradually, and that the bearing races expand evenly.

The following warming up cycle is recommended:

50% maximum rated speed for 2 minutes.

75% maximum rated speed for 2 minutes.

100% maximum rated speed for 1 minute.

Warm the electro-spindle up before machining whenever the machine has been left idle long enough for it to cool down

to ambient temperature.

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