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WM850 High Performance Microstepping Driver
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Table of Contents
1.
Introduction, Features and Applications
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2.
Specifications and Operating Environment
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2
3.
Driver Connectors P1 and P2
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4.
Power Supply
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5.
Driver Voltage and Current
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6.
Selecting Microstep Resolution and Driver Current
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7.
Control Signal Connector (P1) Interface
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8.
Protection Features
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9.
Driver Connection to Motors
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10.
Connection Diagram for Driver, Motor, Controller
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11.
Control signal waveform and timing
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1.
Introduction, Features and Applications
WM850 Driver is a high performance microstepping driver based on the most advanced technology in the world today.
It is suitable for driving 2-phase and 4-phase hybrid step motors (current 5.0A). By using advanced bipolar constant-
current chopping technique, it can output more speed and power from the same motor, compared with traditional
technologies such as L/R drivers. Its current control technology allows coil currents to be accurately controlled, with
much less current
ripple
and motor heating than other drivers on the market.
Features of this driver
•
High performance, low cost
•
Supply voltage up to +72VDC
*
, current to
5.0A
for WM850 Driver
•
Inaudible 20khz chopping frequency
•
TTL compatible and optically isolated input signals
•
Automatic idle-current reduction
•
Mixed-decay current control for less motor heating
•
14 selectable resolutions in decimal and binary
•
Microstep resolutions up to 25,000 steps/rev
•
Suitable for 4,6,8 lead motors
•
Over-current, over-voltage and short-circuit protection
•
Small size (118 x 76 x 34mm)
Applications of this driver
Suitable for a wide range of stepping motors such as low voltage versions of sizes 11, 14, 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 noise, low vibration, high speed and high precision requirements.
2.
Specifications and Operating Environment
Electric Specifications (T
j =
25
℃
)
WM850
Parameters
Min
Typical
Max
Remark
RMS Output Current
1.8A
by user
5.0A
By DIP switch
Supply voltage (DC)
+24V
+68V
+72V
*
Logic signal current
10mA
12mA
18mA
Pulse input frequency
0
By user
500Khz
Isolation resistance
500M
Ω
* For the European Market – the maximum input voltage must be limited to 70VDC to comply with CE regulations.
