M880/M840 Microstepping Driver Manual V1.0
Tel: +086 0755-26434369 1 Web Site: www.leadshine.com
1. Introduction, Features and Applications
Introduction
The M880 and the M840 are high performance microstepping drivers based on one of the most
advanced technologies in the world today. They are suitable for driving 2-phase and 4-phase
hybrid stepping motors. By using advanced bipolar constant-current chopping technique, they can
output more speed and power from the same motor compared with traditional drivers, such as L/R
drivers. Its 3-state current control technology allows coil current to be well controlled with
relatively small current ripple, therefore less motor heating is achieved.
Features
l
High performance, low cost
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Supply voltage up to +80VDC
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Output current up to 7.8A (M880), 3.9A
(M840)
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Inaudible 20KHz chopping frequency
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TTL compatible and optically isolated input
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Automatic idle-current reduction
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Mixed-decay current control for less motor
heating
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14 selectable resolutions in decimal and
binary, up to 51,200 steps/rev
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Suitable for 2-phase and 4-phase motors
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Over-current, over-voltage protection
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Small size
Applications
Suitable for a wide range of stepping motors, from NEMA size 17 to 43. 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
Electrical Specifications
(T
j
= 25
℃
)
M880/M840
Parameters
Min
Typical
Max
Unit
Output current
2.8/1.4
-
7.8/3.9
Amps
Supply voltage
+24
+68
+80
VDC
Logic signal current
7
10
16
mA
Pulse input frequency
0
-
300
KHz
Isolation resistance
500
M
Ω
M880/M840 Microstepping Driver Manual V1.0
Tel: +086 0755-26434369 2 Web Site: www.leadshine.com
Operating Environment and other Specifications
Cooling
Natural Cooling or Forced cooling
Environment
Avoid dust, oil fog and corrosive gases
Ambient Temperature
0
℃
－
50
℃
Humidity
40%RH
－
90%RH
Operating Temperature
70 Max
℃
Operating Environment
Vibration
5.9m/s
2
Max
Storage Temperature
-20
℃
－
65
℃
Weight
Approx. 440g (15.50 oz)/M880; 330 g (11.60 oz)/M840
Mechanical Specifications
(unit:mm, 1 inch = 25.4 mm)
Front view Slide view Front view Slide view
(a) M880 (with heatsink) (b) M840 (without heatsink)
Figure 1: Mechanical specifications
*Recommend use side mounting for better heat dissipation
Elimination of Heat
l
Driver
’
s reliable working temperature should be <65 , and motor working t
℃
emperature should
be <80 ;
℃
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It is recommended to use automatic idle-current mode, namely current automatically reduce to
60% when motor stops, so as to reduce driver heating and motor heating;
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It is recommended to mount the driver vertically to maximize heat sink area.
