Hoist Extended Speed Control
Zip-Moving™ & Multi-Zip-Movement™ Explained
With more than a decade and a half of applications behind it PE® Micro-Speed® Multi-Vector® with Zip-Technology® for hoist speed control has proven to extremely reliable and robust and precise. Use of Zip-Technology™ features have become more and more popular. Zip-Up™ and Zip-Down™ adjustments allow for variation of the extended speed by adapting hoisting load and torque requirements. This allows increased speed (above base speed) for the loads involved up to hoist manufacturers recommendations and any practical mechanical limits.
Zip-Moving™ – How easy can it be!
Setting parameters C120-C129 has proven to be the easiest and most flexible way to run at extended speed (above the motor “base” speed). Since the Multi-Vector® Drive, using Zip-Technology™, adjusts motor speed based on motor torque and the load’s torque requirements; it maximizes performance and cycle times for you. A lightly loaded hoist can then be lifted or lowered at a faster rate and much more reliably than other methods. Setup entails turning Zip-Up and/or Zip-Down features on (C120-C129). Selecting the max load-torque percent allowable for Zip- Move™ is the next step. Last, select the target threshold speed (open up the limits in parameters CL6 & CL7- see manual). The dwell time is also adjustable. It is important to verify and check motor and gearing RPM ratings and also adjust limit switches to accommodate higher hoist speeds. Always verify that settings will not exceed manufacturer’s specifications of the equipment or create a safety concern (high speeds at light loads may not be advisable in some applications for example).
Can be used on Tandem hoists too!
Multi-Zip-Move™ – Used on multiple hoist applications with Page-Swap™:
When setting up a dual hoist, proprietary Page-Swap™ is used (“super programming” available on all PE® Multi-Vector® drives) is used to “make decisions” and set fixed speeds for both hooks while the VFD’s are operating, instantly. This allows and maintains exact speed matching – regardless of the load on either hook. The setup is easy. Page-Swap™ help and setup is just a phone call away to PE® customer technical help-line.
Since the Zip-Technology™ functions can limit the speed based on load; any non-balanced load has the potential to create a speed difference during extended speed operation. Answer to these applications is the use of Page-Swap™ to make the decision of when to allow extended speed to operate. This is the beauty of PAGE-SWAP™ – only available in PE® equipment. Super –programming which changes the drive characteristics UNDER SPECIFIC CONDITIONS, and “swaps” them in REAL TIME while the drive is operating. On Multi-hoist ZIP-Movement™ a compromise between maximum load size and maximum speed is necessary. Simply, the heavier the load you allow to run at extended speed, the lower your max speed (above base speed) setting must be. With Page-Swap™ this is accurately and easily accomplished.
These features should only be used on a non-load brake style hoist. Hoist manufacturers usually do not allow running a load brake hoist above rated speed. At any speed below base speed, one can only lift up to the rated capacity of the hoist/crane. One should not lift more than the rated capacity of the hoist/crane regardless of what speed the hoist is running. The exception may be during a load test. Contact PE® Technical group for application programming assistance if needed.
© Power Electronics® International, Inc. 2011