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6-10 General functions <strong>New</strong> <strong>Functions</strong> <strong>19VRS</strong><br />
• When switching on the main spindle synchronization, the NC<br />
determines the max. admissible speed of the leading spindle on the<br />
basis of all transmission ratios and speed limits. Every time when<br />
modifying the speed limit of the leading or synchronous spindles or<br />
when activating or deactivating the safety-related speed limit, the NC<br />
recalculates the maximum speed of the leading spindle. The NC<br />
carries out any possibly required limitation synchronously for all<br />
spindles involved in the synchronization.<br />
• If the actual spindle speed exceeds the speed limit when switching on<br />
the interface signal ´Activate limit´, the NC reduces the speed of the<br />
concerned spindle to the smallest maximum limit speed by considering<br />
the other speed limits.<br />
• If a coupling (G33, G63, G64, G65, G95) or main spindle<br />
synchronization is active when switching on, the NC adjusts the<br />
spindle speed and the path velocity of the feed axes or spindles<br />
involved in the coupling or synchronization.<br />
• Modifications of the nominal speed value carried out by means of the<br />
spindle override are ignored.<br />
• In case of PLC-controlled spindles, the limited speed has to be read at<br />
each positive edge of this status signal and transferred to the external<br />
spindle.<br />
Safety-related speed limit<br />
The safety-related speed limit allows the machine manufacturer to limit<br />
the spindle speed when using a new chuck or opening the protective<br />
door.<br />
Programmable speed limit<br />
The programmable speed limit allows the NC programmer to limit the<br />
admissible spindle speed under consideration of the technological<br />
aspects.<br />
DOK-<strong>MTC200</strong>-NEW*FUN*V19-AW02-EN-P
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