Duty Cycle - Wahlberg Roll Down Manual

Normal Operation
Temperatures
If the surface temperature of the Roll Down exceeds 70°C (194°F) there is a risk of damaging the
Roll Down.

Duty cycle

The Roll Down should not be operated at a duty cycle higher than 30% for longer periods of time.
The duty cycle is the fraction of a period where the motor is active. The duty cycle is commonly
expressed as a percentage or a ratio. It can be described as the period of time it takes for a system
to complete an on-and-off cycle.
Thus, a 10% duty cycle means the system is on 10% of the time and off 90% of the time. The "on
time" for a 10% duty cycle is normally connected to a cycle length in minutes. E.g. a max duty cycle
of 30% (10 min ON / 23 min OFF), means that the motor may not be active more than 10 minutes
every 33 minutes or after 10 minute of ON the motor must be OFF for 23 minutes.
Lifting speeds and weight
The load of the Roll Down impacts the minimum speed it can operate at. At heavy loads the
minimum speed up must be increased to a point where the Roll Down can still move.
If a light load is used with high minimum speeds the Roll Down might have problems with finding
its position. Lower the minimum speeds if this is a problem.
The minimum speed can be adjusted from the menu.
249.805.013 28 Date: 2021-12-09