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Leadshine Driver MA860H

Introduction 

The MA860H is a high performance microstepping driver based on pure-sinusoidal current control technology. Owing to the above technology and the self-adjustment technology (self-adjust current control parameters) according to different motors, the driven motors can run with smaller noise, lower heating, smoother movement and have better performances at higher speed than most of the drivers in the markets. It is suitable for driving 2-phase and 4-phase hybrid stepping motors. 

Features 

l High performance, cost-effective 

l Supply voltage up to 80VAC or +110VDC 

l Output current up to 7.2A 

l Self-adjustment technology 

l Pure-sinusoidal current control technology 

l Pulse input frequency up to 300 KHz 

l TTL compatible and optically isolated input 

l Automatic idle-current reduction 

l 16 selectable resolutions in decimal and binary, up to 51,200 steps/rev 

l Suitable for 2-phase and 4-phase motors l Support PUL/DIR and CW/CCW modes 

l Short-voltage, over-voltage, overcurrent and short-circuit protection 

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 noise, low heating, high speed performance.

Power Supply Selection 

The MA860H can match Large and small size stepping motors (from Nema size 17 to 43) made by Leadshine or other motor manufactures around the world. To achieve good driving performances, it is important to select supply voltage and output current properly. Generally speaking, supply voltage determines the high speed performance of the motor, while output current determines the output torque of the driven motor (particularly at lower speed). Higher supply voltage will allow higher motor speed to be achieved, at the price of more noise and heating. If the motion speed requirement is low, it’s better to use lower supply voltage to decrease noise, heating and improve reliability. 

Selecting Supply Voltage

The power MOSFETS inside the MA860H can actually operate within 18 ~ 80VAC or +24 ~ +110VDC, including power input fluctuation and back EMF voltage generated by motor coils during motor shaft deceleration. 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. Therefore, it is suggested to choose only sufficiently high supply voltage for intended applications, and it is suggested to use power supplies with theoretical output voltage of 18 ~ 60VAC or +24 ~ +85VDC, leaving room for power fluctuation and back-EMF.

Wiring Notes 

  • In order to improve anti-interference performance of the driver, it is recommended to use twisted pair shield cable. 
  • To prevent noise incurred in PUL/DIR signal, pulse/direction signal wires and motor wires should not be tied up together. It is better to separate them by at least 10 cm, otherwise the disturbing signals generated by motor will easily disturb pulse direction signals, causing motor position error, system instability and other failures. 
  • If a power supply serves several drivers, separately connecting the drivers is recommended instead of daisy-chaining. 
  • It is prohibited to pull and plug connector P2 while the driver is powered ON, because there is high current flowing through motor coils (even when motor is at standstill). Pulling or plugging connector P2 with power on will cause extremely high back-EMF voltage surge, which may damage the driver. 

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