IAI America RCS2W - Manual (Page 46)

1. Specifications Check
38
1.2.8 Duty Ratio in Continuous Operation
Continuous operation is available with the duty ratio 100%.
Duty ratio is the rate of operation expressed in % that presents the time of the actuator being operated in 1
cycle of operation.
Caution: If an overload error occurs, extend the stopped time to lower the duty or decrease
theacceleration/deceleration speed.
[How to Calculate Duty]
Figure out the load rate and acceleration/deceleration speed time ratio by calculation and read the duty ratio
from the graph. When the load rate is less than 50%, an operation with 100% duty ratio (continuous
operation) should be available.
1) Duty ratio LF
It is descried in 2. Specifications regarding the maximum transportable weight at the rated acceleration and
rated acceleration/deceleration.
Duty ratio: LF = [%]
Maximum transportable weight at the rated acceleration : Mr [kg]
Rated acceleration/deceleration
: Dr [G]
Transferring mass during operation : M [kg]
Acceleration/deceleration during operation : D [kg]
2) Acceleration/deceleration time ratio t
od
Acceleration/deceleration time ratio t
od
= [%]
Acceleration time = [sec] Deceleration time = [sec]
Acceleration [mm/s 2 ] = Acceleration [G] u 9,800mm/s 2
Deceleration [mm/s 2 ] = Deceleration [G] u 9,800mm/s 2
3) Read the duty ratio from the load rate LF and the acceleration speed time ratio tod that were used to
figure out the duty ratio.
Example) If the load factor LF is 80% and acceleration/deceleration time ratio tod is 80%, the reference
duty is approx. 75%.
M u D
Mr u Dr
Velocity at
operation [mm/s]
Acceleration during
operation [mm/s 2 ]
Deceleration time
during operation
Acceleration time
during operation
Operation Time
+
Velocity at
operation [mm/s]
Deceleration during
operation [mm/s 2 ]
Approx
75%
50%
45 %
LF = Less than 50%
LF = 60%
LF = 70%
LF = 80%
LF = 90%
LF = 100%
High Accel/Decel Type
LF = 125%
High Accel/Decel Type
LF = 150%
High Accel/Decel Type
LF = 200%
High Accel/Decel Type
Reference of Operation Duty [%]
Acceleration/deceleration time ratio t
od
[%]