Wahlberg Roll Down Manual page 29

Synchronized movements of multiple Roll Downs
If several Roll Downs are installed to perform synchronized movements the best result is achieved
by using a fading 16 bit position. The Roll Downs have a slight deviation in performance of the
motors, so some motors have a slightly higher maximum speed than others.
This difference in speed can be solved by running the Roll Downs with fading positions, like when
fading conventional light over time, the position of the Roll Down should be faded from one
position to another over a certain amount of time. In that way the Roll Downs will follow the fade-
curve, and multiple Roll Downs can follow the same fade curve.
When fading the positions:
1. The speed channel should be set to 100 to gain the highest possible speed.
2. The position channel should be assigned as a 16-bit channel with MSB and LSB.
3. The speed of the fade needs to be slower than the maximum speed, so the motors have
speed enough to follow the fade-curve.
If the fade of the positions is too fast, the Roll Downs will move at the maximum speed, and you
will see the difference in the motor speed.
If the fade is to slow the Roll Downs will move – stop – move – stop, when the position changes,
thus giving a discontinuous movement.
249.805.013 29 Date: 2021-12-09