Fig 7.8 Operation Pattern Of Vertical Load - OE Max Controls CSDJ Plus User Manual

7 - 18 CSDJ Plus Servo Drive User's Manual
The table above is for the horizontal load. When using in vertical load,
allowable load inertia may be lowered according to the usage condition
Refer to [C. Vertical Load].
The table above is load inertia when operating in rated speed. Supposing that
!
there is no friction, energy the rotor generates is calculated as follows
Warning
Thus, when operating above the maximum speed, the maximum allowable load
inertia is remarkably lowered. Contact the agencies. On the contrary, if it is
operated with lower than rated speed, it can correspond to greater load inertia
than that of above table. In other words, if the speed is reduced to half, then
the allowable load inertia gets 4 times bigger.
C. Vertical Load
In case of vertical load operation, continuous regeneration area may occur when moving
downward at a constant speed. Be cautious in regeneration when operating a vertical load.
Motor speed or torque value can be checked in DA output (CN1 pin 23, 28) or PC S/W.
Motor speed
Torque
1/2 × (Total rotor inertia) × Speed
When the load
is raised
N
1
t
1
T
I
0

Fig 7.8 Operation Pattern of Vertical Load

Continuous regeneration area
When the load is
lowered
N
2
t t
2 1
I
0
I
L
Not regen rated
when I
2
e
<0
L