smartatuls
Member
Hi,
We are trying Hoist synchronization for 4 hoists which has same motor, gearbox and drive.
In PLC(Schneider) there is a FB for synchronization in which our hoist2 is master and hoist 1,3, 4 are slaves.
It was not synchronising properly initially, later we found there is speed difference in them which causes to increase GAp between them.
To comensate such difference we have a Gear ratio variable where we try to reduce gear ratio for hoists which are running faster.
Since Hoist2 is master, Hoist1,3,4 are following him and the gear ratio we modify applies to Hoist1,3,4.
For Hoist3 and 4 it is working ok as per new gear ratio but not working for Hoist1.
We tried alot but Hoist1 comes down (15-25 mm) in one cycle then keep on increasing/accumulating this difference. Some times Hoist1 does not create such difference or creates less tahn 5 mm. Its behaviour is not consistent.
Can anyone please help?
We are trying Hoist synchronization for 4 hoists which has same motor, gearbox and drive.
In PLC(Schneider) there is a FB for synchronization in which our hoist2 is master and hoist 1,3, 4 are slaves.
It was not synchronising properly initially, later we found there is speed difference in them which causes to increase GAp between them.
To comensate such difference we have a Gear ratio variable where we try to reduce gear ratio for hoists which are running faster.
Since Hoist2 is master, Hoist1,3,4 are following him and the gear ratio we modify applies to Hoist1,3,4.
For Hoist3 and 4 it is working ok as per new gear ratio but not working for Hoist1.
We tried alot but Hoist1 comes down (15-25 mm) in one cycle then keep on increasing/accumulating this difference. Some times Hoist1 does not create such difference or creates less tahn 5 mm. Its behaviour is not consistent.
Can anyone please help?
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