Wahlberg 241 User Manual - page 18
18
805.241.011
Date: March 22
rd
, 2017
Positioning
When the winch has been reset and the top-position is set, it is possible
to use it for positioning run. The green LED next to the MODE selector
indicates, by fast flashing, that the winch needs to be reset, before it
can be used.
The position is set on the DMX channel 1 and 2, which controls the rough-and fine-position.
Where 100 % is the top-position and 0 % is the bottom-position.
The positions lamp indicates, by slow flashing, that the winch has been reset and that it is going
towards the wanted position. The position lamp indicates, by stable light, that the winch has
found the wanted position and the motor has stopped.
The speed is set on the DMX channel 3, where 100 % is the fastest and 0 % is the slowest.
The winch does not run unless the DMX channel 3 is set above zero, and therefore also works as
a main brake.
Re-calibrating overload
The winch comes with overload calibrated to 11kg which means that overload will occur when
loads above 10kg is loaded on the winch.
The overload can be re-calibrated to lower values as follows:
1.
Ensure at least 1 m clearance below the winch
2.
Load the winch with the desired overload threshold weight + 1kg (max 11kg total)
3.
Set the DMX channels to 999
4.
Then set mode to 9
The winch will now run down a number of times. When the winch has moved back to the top
position the overload has re-calibrated.
Ensure to change the DMX channel and MODE away from 999 and 9 after re-calibration.
Synchronized movements of multiple winches
If several winches are installed to perform synchronized movements the best result is achieved
by using a fading 16 bit position. By nature there is a slight deviation in performance of the
motors so some motors have a slightly higher maximum speed than others.
Like when fading light, the positions of the different winches should be faded, and the winches
will tend to follow that fade. When fading the positions:
1.
The speed channel should be a set to 100 to gain the highest possible speed.
2.
The position channel should be added as a 16 bit channel and not just the MSB on
channel 1.
3.
The speed of the fade needs to be slower than the maximum speed, so the motors have
speed enough to perform the movement.
If the fade of the positions is too fast, the winches will move at the maximum speed, and you will
see the difference in the motor speed.
If the fade is to slow the winches will move – stop – move – stop, when the position changes,
thus giving a discontinuous movement.