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Elevation 1+
© 2011 Kinesys Projects Ltd
11
Unit Configuration
Several of the parameters that have to be set up within the Elevation 1+ are dependant
on the type of motor in use. The PID control loop parameters are covered earlier in this
manual.
The other device specific parameter is the encoder scaling. This converts the number of
encoder pulses derived from the hoist to physical distance travelled in millimetres. The
encoder scaling is defined as the distance travelled per encoder pulse edge. This
distance is measured in mm x 100,000. The number of encoder pulse edges per
encoder revolution is 4 x the number of encoder pulses per revolution (A 100 pulse
encoder will produce 400 encoder pulse edges per revolution). As an example an
encoder scaling of 55060 means the encoder produces a pulse edge every 0.5506mm.
If the encoder scaling value is incorrect the result may either be no movement from the
hoist or it may overshoot or fail to reach its target position as well as running at incorrect
speeds.
An example encoder calculation is shown below for a winch with a 1024 pulse encoder
connected directly to a drum of 788mm circumference.
Distance traveled per encoder edge (mm) = Drum Circ / (Encoder Pulses x 4).
Distance traveled per pulse = 788/(1024x4) = 0.19238mm.
This would equate to an encoder scale of 19238.
When determining the encoder scaling of a particular hoist, if the Elevation shows a
position change smaller than the actual position travelled. Then the encoder scale needs
to be increased.
The list below shows the required value for different hoists.
Hoist Model
UK Speed
US Speed Enc Scale
>= V5.00
LodeStar LL
8m/min
32ft/min
7590
LodeStar JJ
16m/min
64ft/min
7590
Liftket
(Most Models)
20m/min
80ft/min
55060
Note that software versions 4.xx and below used a less accurate encoder scaling based
on the distance is measured in mm x 10,000. If you are using V4.xx elevation software or
below then divide the encoder scaling by a factor of 10.
Hoist Model
Old Enc Scale
<= V4.xx
Enc Scale
>= V5.00
LodeStar LL
759
7590
