User’s Manual for FD430 Digital 2-Phase Stepper Driver
User’s Manual for FD430 Digital 2-Phase Stepper Driver
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3. Power supply Selection, Driver Voltage and Current Selection
1
）
Power Supply Selection
Generally Speaking, Higher supply voltage can increase motor torque at higher speeds,
thus helpful for avoiding losing steps. However, higher voltage may cause bigger motor
vibration at lower speed, and it may also cause over-voltage protection or even driver
damage.
2
）
Set Value of output current
For a given motor, higher driver current will make the motor to output more torque, but at
the same time causes more heating in the motor and driver. Therefore, output current is
generally set to be such that the motor will not overheat for long time operation. Phase
current rating supplied by motor manufacturer is important to selecting driver current, but
the selection also depends on leads and connection. In principle, If the temperature
（
<40
℃）
is very low, you can appropriately increase the current setting value to increase
the motor output power as required(Torque and high-speed response).
●
4-lead motor: the output current is set to be equal to or less than the rated current of the
motor.
●
6-lead motor high torque Mode: the motors should also be run at only 50% of their rated
current which is unipolar connection.
●
6-lead motor high speed Mode: the motors should also be run at only 100% of their
rated current which is unipolar connection.
●
8-lead motor Series Connections: the motors should also be run at only 70% of their
rated current which is unipolar connection.
●
8-lead motor
Parallel
Connections: the motors should also be run at only 140% of their
rated current which is unipolar connection.
\Note: After the current setting, please run the motor for 15~30 minutes, if the
temperature rise of the motor is too high
（
>70
℃）
, reduce the current setting value.
Therefore, the general situation is to set the current to the value when the motor is warm
for a long time, but it is not too hot.
Ⅶ
. Typical Connection
The FD430 driver with SC42-08 motor which may be connected in series or parallel, If
the motor direction is different from the expected direction, just exchange A+ and A-.
FD430 driver can drive any 2-phase or 4-phase of 4, 6, 8- lead hybrid step motors. The
following diagrams illustrate connection to various kinds of motor leads:
Note:
1
）
Different motors have different phase wire colors. When using the motor, the motor
data description shall be prevail, For example, the color of 57 and 86 motor wires is
different.
2
）
The phase is relative, but the windings of different phases cannot be connected to the
4
线电机
8
线电机并行接法
高速性能好
8
线电机串行接法
低速力矩大
6
线电机高力矩模式
6
线电机高速模式
Figure 6 Motor Wiring
A+
A-
B+
B-
A+
A-
B+
B-
A+
A-
B+
B-
A+
A-
B+
B-
A+
A-
B+
B-
Figure 7 Typical Connection
控
制
器
R
R
R
FD430S
PUL+
PUL-
DIR+
ENA+
DIR-
ENA-
DC24V
GND
+Vdc
SC42-08
A+
A-
B-
B+
