78
Common problems during stopping and their solutions
Initial Start Up
Speed
t
LF.33 = 1000
Offset value OK.
LF.33 = 1000
OK but corner speed US.21 too low. In this case
the speed begins to lag during the deceleration but
then recovers in the î nal approach. With gearless
it is often necessary to raise the corner speed of
the start of the offset to a higher value.
Raise US.21 from 24ft/min to 100ft/min.
Speed
t
US.20
US.21
Speed
t
LF.33 = 3000
Higher offset value leads to bunching or steps
during î nal approach, faster oscillations, reduce
value in steps of 500.
Speed
t
LF.33 = 500
Speed lags during the î nal phase of decel, one
slow oscillation just before stop, under shooting of
î oor. Raise in steps of 500.
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