C
L E A R
P
A T H
- S C
U
S E R
M
A N U A L
R
E V
.
1 . 3 6
2 9
T
EKNIC
,
I
NC
. T
EL
.
(585)
784-7454
A
DDITIONAL
P
OWER
S
UPPLY
C
ONSIDERATIONS
O
PERATE IN THE
24-75VDC
R
ANGE
Always operate ClearPath-SC within the recommended operating voltage
range of 24VDC to 75VDC. Do not operate at the motor's absolute
minimum and maximum voltage values, as this will tend to cause
shutdowns.
Note: When measuring DC bus voltage, always take measurements
directly at the motor's power connector—not at the power supply's output
connector.
W
HY
A
VOID
(
MOST
)
S
WITCHING
P
OWER
S
UPPLIES
Switching power supplies are typically not well suited to high power servo
applications because they generally have the same peak and continuous-
current ratings. This can lead the user to purchase a large—but ultimately
under-worked—power supply just to meet peak current requirements.
In addition, most switchers are not designed to handle the regenerated
energy that a decelerating motor returns to the power supply. Without
special provisions, regenerated energy can cause a switching supply to
reset, power cycle, shut down, or even fail.
Engineer's Note: It is very common for machine requirements to
change during the development cycle (e.g. "We need higher accelerations,
and higher speeds, NOW!"). For that reason, Teknic often recommends
beginning a machine project with a robust 75VDC supply. That way, if the
project manager decides to increase the moving mass, turn up the speed,
decrease cycle times, change gearing, or add another axis to the system,
you're more likely to have the necessary power available to handle the new
requirements.