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Authorized Distributor of Leadshine Technology
1. Introduction, Features and Applications
Introduction
The ME742 is an economical microstepping driver based on patented technology of Leadshine. It
is suitable for driving 2-phase and 4-phase hybrid stepping motors. By using the advanced bipolar
constant-current chopping technique, it can output more speed and torque from the same motor,
compared with traditional drivers, such as L/R drivers. Its 3-state current control technology
allows coil currents to be well controlled and with relatively small current ripple, therefore less
motor heating is achieved.
Features
l Low cost and good high-speed torque
l Supply voltage up to +70VDC
l Output current up to 4.2A
l Optically isolated input signals
l Pulse frequency up to 200 KHz
l Automatic idle-current reduction
l 3-state current control technology
Applications
Suitable for a wide range of stepping motors from NEMA size 16 to 34. It can be used in various
kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines,
pick-place devices, and so on. Particularly adapt to the applications desired with low vibration, high
speed and high precision.
2. Specifications and Operating Environment
Electrical Specifications (T
= 25℃)
j
Parameters
Min
Output current
1.0
Supply voltage
20
Logic signal current
Pulse input frequency
Isolation resistance
500
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ME742 Economical Microstepping Driver Manual V1.0
l 15 selectable resolutions
l Suitable for 2-phase and 4-phase motors
l DIP switch current setting with 8 different
values
l CW/CCW mode available (optional)
l Over-voltage and short-circuit protection
l Small size (118*75.5*33mm)
ME742
Typical
Max
-
4.2 (3.0A RMS)
48
70
7
10
16
0
-
200
1
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www.leadshine.com
Operating Environment and other Specifications
Cooling
Operating Environment
Storage Temperature
Weight
Mechanical Specifications (unit:mm, 1 inch = 25.4 mm)
Unit
Elimination of Heat
A
l
Driver's reliable working temperature should be <65 , and motor working temperature should
VDC
be <80 ;
℃
mA
l
Recommend use automatic idle-current reduction mode, namely current automatically be
KHz
reduced to 60% when motor stops, so as to reduce driver heating and motor heating;
MΩ
l
Recommend use side mounting to maximize heat sink area.
Tel: +086 0755-26434369
www.leadtronker.com
ME742 Economical Microstepping Driver Manual V1.0
Natural Cooling or Forced cooling
Environment
Avoid dust, oil fog and corrosive gases
Ambient Temperature
Humidity
Operating Temperature
Vibration
-20℃ － 65℃
Approx. 280 gram (9.9 oz)
Figure 1: Mechanical specifications
*Recommended to use side mounting for better heat dissipation
℃
2
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0 ℃ － 50℃
40%RH － 90%RH
70
℃
Max
2
5.9m/s
Max
Web Site:
www.leadshine.com
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