TWIN – Use and maintenance instruction manual
Chap. 5
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5.3.4 Spindle pre-heating
During the first daily start-up, and any time the spindles have cooled to room temperature, all the
spindles must first run through a short heating cycle, to allow the bearings to gradually reach a uniform
working temperature.
For this purpose, a program must be created in which all the spindles are used as follows:
SPINDLE PRE-HEATING PROCEDURE 1 of 1
STEP ROTATION SPEED CYCLE TIME
1
50% max speed (12,000 1/min) 5 min
2
75% max speed (18,000 1/min) 3 min
3
100% max speed (24,000 1/min) 3 min
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