Stop / Retardation Distances - Alimak ALC II User Manual

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Stop / retardation distances

The stopping distance (DOL lift) or retardation distance (VFC
lift), is automatically set during the calibration drive up and
down against the Reference / Retardation down cam.
NOTE!
The down limit cam shall always be adjusted so that the up /
down limit switch is approximately 10 mm (1/2 in.) above the
cam when the lift is level with the bottom landing. Deviations
can occur. Please see the manuals delivered with the lift.
Stop distances (DOL lift)
The ALC controller automatically sets the stopping distances,
automatically during system calibration drive, in the following
manner:
– Push the Up and Down buttons on the car ALC CPU. The lift
moves in an upward direction and stops a short distance
above the Reference / Retardation cam. The lift is now
located above the Reference / Retardation cam and is still in
calibration mode.
– The lift moves automatically upwards to measure speed and
brake distance in the upward direction. After that the lift
moves automatically downwards to measure speed and brake
distance in the opposite direction. The system does this
procedure 4 times. If the speeds are equal for 4 different starts
the system itself makes the conclusion that the lift is intended
for DOL opeartion.
– The lift moves once more – this time downwards to stop on
the Reference / Retardation cam.
The ALC-system returns to normal mode with door zone,
the stop distances and speed automatically programmed
into the system.
NOTE!
– The Reference / Retardation cam shall be located approx-
imately 240 mm (9 1/2 in.) above the down limit cam.
Deviations can occur. Please see the manuals delivered with
the lift.
New system set-up and system calibration must be done if
car CPU is replaced.
Keep the Up/Down button depressed during the entire drive
sequence – if the hold to run feature is chosen.
ALIMAK 34820 - 1 /05