Fig.4-3:
Speed-time-graph for triangle operation
The dimensioning of this operation is mainly made according to the necessary
maximum torque M
max
and the average velocity V
average
resp. mean speed
n
average
.
Continuous operation without
pause interval (S1)
This mode of operation is characteristic for drives in printing machines.
Fig.4-4:
Speed-time graph for constant speed
The dimensioning is made according to the necessary continuous torque M
dN
and the velocity v or the speed n.
4.2
Selection
Drive-Determined Sizes
The selection of the suitable motor/-gearbox combination, operating with a drive
control device, is to be taking in the following into consideration:
●
Frictional torque
●
Starting torque
●
Processing torque
●
Accelerating torque
●
Effective speed
●
Necessary speed
●
ON time
Dimensioning Criteria
The motor-gearbox combination must fulfill the following conditions:
●
The necessary speed must be reached.
●
The continuous torque rating of the motor-gearbox combination has to be
higher than the effective load torque.
●
The intermittent torque has to be higher than the sum of the frictional,
starting and processing torque.
●
The maximum torque has to be higher than the sum of frictional, weight
and processing torque.
●
The required acceleration time has to be within the limit of the relevant
drive selection lists.
Bosch Rexroth AG
DOK-GEAR**-GTE********-PR06-EN-P
Rexroth GTE Planetary Gearboxes
22/85
Dimensioning and Selection
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
