Sharp SV-4328 Maintenance Manual page 44

PRECISION MACHINE TOOLS
Ver 2 Maintenance Manual
The spindle has already been appropriately adjusted prior to the installation. It is normal to have a
slight increase of temperature. Spindle oil temperature is supplementary only; do not set the
temperature too high or too low. The temperature control mechanism for the cooler is base on
tracking temperature differences between the oil temperature and the room temperature (or the
machine temperature) to make sure that the difference is well maintained.
The cooling unit is turn on and off automatically based on the temperature of the machine. The
control key of the oil temperature is on the control panel of the cooling unit. When the SV is set to 0℃,
the oil temperature and the machine temperature are the same. When the SV is set to +℃,
temperature of the oil will be greater than of machine. When the SV is set to -℃, temperature of the
oil will be less than of the machine. In general, these two temperatures are set to be equal. If the oil
temperature is set to be lower than the machine temperature, temperature of the oil tank will be
smaller than that of the machine. In this case, condensation may occur, which could contaminate the
oil. Moreover, the external guide way of the bearing may shrink during the operation because the
level of fraction and temperature will be increased, which can damage the spindle.
Do not arbitrarily modify the default value.
Note: This machine has automatic fault detection. When any fault detected, the panel will flash and
display the fault signal. Troubleshooting is required. Then, turn off the machine for at least 10 sec
before turning it on again. For operation quality, double-check that all the problems have been
resolved and the system is at a good condition.
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