Rorze RD-122 - Current Adjustment; Current Adjustment Trimmer; Wiring for Current Measurement

4. Current Adjustment
2
４．Current Adjustment
Fig.2. Current Setting Trimmer
4-1 Current Adjustment Trimmer
Caution
Please use after adjusting the current within the motor rated current.
Exceeding the rated current causes the failure of motor or fire.
This is used to adjust the stepping motor drive current and in general it makes twice to the rated
current.
If a motor is used at a high rpm with a lower-than-rated torque, better efficiency and less
temperature rise can be obtained by using the motor with a current lower than the rated value.
(Note: As the current decreases, the torque will lower.)
The drive current changes relative to the dial. The value of the setting will be ±10 % of the set
value.
Fig.3. Current Setting
4-2 Wiring
In order to measure the exact drive current, connect an ammeter as shown in the 4. “Wiring
dimension” and follow the next instructions.
1. Turn on the power after setting High Speed and Low Speed Trimmer to the minimum value.
2. As reading at the ammeter, adjust Current Trimmer and set to twice value of the rated current
/phase.
Fig.4. Wiring dimension
Ｍ
GN
D
18-40VD
C
A
A
MMETER
Set to the desired motor run current
Connect STOP/START and
SPEED H/L to GND
Set the minimum for High and Low Speed
GND
010
DC
－＋
Ｓ
Ｌ－＋
CLOCKOUT
FREE
SPEED H/L
CW/CCW
STOP/START
GND
CURRENT
18V-
40V
LOW
SPEED
GROW
TIME
HIGH
SPEED
C1
C2
A
A
B
B
2P PULSE MOTOR DRIVER
RD-122
MADE IN JA PAN
012345678910
Current VR Graduations
Drive Current (A)
1
2
0
3
CURREN
T
0 10
！