Introduction:
MD882 is a high performance microstepping driver using pure-sinusoidal wave current control technology. It is particularly suitable for applications desired with extremely low noise and low heating. 电流ly most of the microstepping drivers in the market apply pseudo-sinusoidal current control technology, which makes the output current to be a distorted sine wave, or makes much current ripple, both cause the motor higher noise and bigger vibration, furthermore cause serious motor heating, so when the motor works long time, the torque decrease, motor aging and the use life shorted. However the pure-sinusoidal precise current control technology (domestic patented technology) applied by MD882 can improve above problems very well, and the operating effect of the stepping motor is somehow inclined to that of servo motor.
应用s:
Suitable for a wide range of stepping motors of Nema 17, 23 and 34, and usable for various kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines, and pick-place devices. Particularly useful in applications with low vibration, high speed and high precision are desired.
Electric 参数 (Tj=25o)
Parameters
MD882
Min.
Typical
Max.
单位
Output current
1.8
-
8.2 (5.86A RMS)
Amps
Supply voltage (DC)
24
68
90
VDC
Logic signal current
7
10
16
mA
Pulse input frequency
0
-
300
Khz
Isolation resistance
500
-
-
MΩ
Mechanical 参数 (单位: mm, 1 inch=25.4 mm)
Pin Assignment and 描述
Control Signal Connector P1 pins
Pin Function
Details
PUL﹢(+5V)
Pulse signal: in single pulse (pulse/direction) mode, this input represents pulse signal, effective for each rising edge; 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse) this input represents clockwise (CW) pulse. For reliable response, pulse width should be longer than 2.5μs. Series connect resistance for current-limiting when +12V or +24V used.
PUL- (PUL)
DIR+ (+5V)
DIR signal: in single-pulse mode, this signal has low/high voltage levels, representing two directions of motor rotation; in double-pulse mode (set by inside jumpers J1&J2), this signal is counter-clock (CCW) pulse, effective on each rising edge. For reliable motion response, DIR signal should be ahead of PUL signal by 5μs at least. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW.
DIR- (DIR)
ENA+ (+5V)
Enable signal: this signal is used for enabling/disabling the driver. 高度 level for enabling the driver and low level for disabling the driver. Usually left unconnected (enabled).
ENA- (ENA)
Remark: Upward-rising edge effective is the default mode, and under-cover resistors R13 & R14 can be used to set effective in downward-falling edge; PUL/DIR is the default mode, and under-cover resistors R31 & R32 can be used to set to CW/CCW mode, namely double-pulse mode.
功率 connector P2 pins
Pin Funtion
Details
Gnd
DC power ground
+V
DC power supply, +24VDC － +90VDC, Including voltage fluctuation and EMF voltage.
Phase A
电机 coil A (leads A+ and A-)
Phase B
电机 coil B (leads B+ and B-)
Microstep Resolution Selection
Microstep resolution is specified by 5, 6, 7,8 DIP switches as shown in the following table:
usteps/rev.( 1.8°/rev)
SW5
SW6
SW7
SW8
400
ON
ON
ON
ON
500
OFF
ON
ON
ON
600
ON
OFF
ON
ON
800
OFF
OFF
ON
ON
1000
ON
ON
OFF
ON
1200
OFF
ON
OFF
ON
1600
ON
OFF
OFF
ON
2000
OFF
OFF
OFF
ON
2400
ON
ON
ON
OFF
3200
OFF
ON
ON
OFF
4000
ON
OFF
ON
OFF
5000
OFF
OFF
ON
OFF
6000
ON
ON
OFF
OFF
6400
OFF
ON
OFF
OFF
8000
ON
OFF
OFF
OFF
10000
OFF
OFF
OFF
OFF
电流 Setting
峰值电流 (A)
RMS (A)
SW1
SW2
SW3
1.8
1.29
OFF
OFF
OFF
2.70
1.93
ON
OFF
OFF
3.60
2.57
OFF
ON
OFF
4.60
3.29
ON
ON
OFF
5.50
3.93
OFF
OFF
ON
6.40
4.57
ON
OFF
ON
7.30
5.27
OFF
ON
ON
8.20
5.86
ON
ON
ON
Typical Connections
Figure 3: Connections to PNP signal (common-cathode)
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