3.2 Specifications and Ratings
3.2.2 Ratings
3-11
3
S
pecification
s
, Rating
s
, and Exter
nal Dimen
s
ion
s
of
S
GM7D
S
ervomotor
s
*5.
The thrust loads and moment loads that are applied while a Servomotor is operating are roughly classified into
the following patterns. Design the machine so that the thrust loads or moment loads will not exceed the values
given in the table.
The allowable load is for a static load in one direction.
When designing the system, multiply the allowable load by the following safety coefficient depending on the
type of load.
•
Smooth load with no shock: 1/3
•
Light repetitive load: 1/5
•
Shock load: 1/10
Note: 1. These values are for operation in combination with a SERVOPACK when the temperature of the armature
winding is 20°C. These are typical values.
2. For the bearings used in these Servomotors, the loss depends on the bearing temperature. The amount of
heat loss is higher at low temperatures.
F
Where F i
s
the external force,
Thru
s
t load = F + Load ma
ss
Moment load = F × L
Where F i
s
the external force,
Thru
s
t load = F + Load ma
ss
Moment load = 0
Where F i
s
the external force,
Thru
s
t load = Load ma
ss
Moment load = F × L
Rever
s
e
Forward
Thru
s
t load direction
Rever
s
e
Forward
Thru
s
t load direction
F
L
F
L
