By adopting high resolution encoders, Leadshine easy servo products apply servo controls on high torque stepper motors. Those products combine advantages of brushless servo systems and conventional stepper systems.
Leadshine easy servo products are featured with closed position loops, high starting & low speed torque, no torque reservation, high stiffness at standstill, extra low heating, smooth motor movement, no hunting, no overshoot, zero settling time, and no tuning for most applications. You can click above tabs to read details about what are Leadshine easy servo, and their advantages over stepper systems & servo systems.
Leadshine's easy servo products are available in integrated easy servo motors, easy servo drives, and easy servo motors.
Traditional stepper systems operate in open loop condition provide position control without feedback from stepper motors to the controlling stepper drives. In a stepper system, the stepper drive keeps outputting preset current into the controlled stepper motor to move the attached load to the target positions. It does not know the current motor movement position, even when loss of movement synchronization (difference between desired move distance and actual moved distance) has happened and caused "Loss of Steps". Therefore, engineers have to make huge torque reservation (30-50%) to ensure "NO" loss of steps would happen. But because of the "open loop" feature of stepper systems, it is still commonly seen that loss of steps happens, especially in quick acceleration or quick torque require changes. That could result in wasting processed materials, crushing control systems, or even damaging machines. That's one of the main reasons limiting the adoption of stepper technology in many motion control applications.
Traditional stepper systems operate in open loop condition provide position control without feedback from stepper motors to the controlling stepper drives. In a stepper system, the stepper drive keeps outputting preset current into the controlled stepper motor to move the attached load to the target positions. It does not know the current motor movement position, even when loss of movement synchronization (difference between desired move distance and actual moved distance) has happened and caused "Loss of Steps". Therefore, engineers have to make huge torque reservation (30-50%) to ensure "NO" loss of steps would happen. But because of the "open loop" feature of stepper systems, it is still commonly seen that loss of steps happens, especially in quick acceleration or quick torque require changes. That could result in wasting processed materials, crushing control systems, or even damaging machines. That's one of the main reasons limiting the adoption of stepper technology in many motion control applications.
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For the case of conventional servo motor systems, there is a considerable delay between the commanding input signals and the resultant motion because of the constant monitor of the current position, necessitating a waiting time until it settles, called settle time.
Since the ES easy servo is a stepper motor based system, it operates in synchronism with command pulses and has no hunting problem. When it stops, its position is completely stable and does not fluctuate. It is a great feature of the ES when rapid motions with a short distance are required and it is ideal for applications such as bonding and vision systems in which hunting would be a problem.
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Since the ES easy servo system is a stepper motor based system, so it has the advantages of high stiffness at standstill, high torque at starting and low speed, eliminating gear box. The ES adopts sophisticated control algorithms to take advantage of high-torque capability, providing direct-drive of high inertia loads such as flywheels and belt drives. These load inertials may be as large as 100 times the motor inertia while still providing smooth positioning control. Conventional servo systems typically cannot exceed a 10:1 inertial mismatch.
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Unlike a servo system which usually needs the engineer to spend a long time to learn how to use tuning tools and tune the gains for a satisfying performance, the ES series easy servo is ready for operation within a very short period of time. Set the microstep resolution and operating current, then the system is ready and offers high performance approaching to a fine tuned servo. Save time and save cost.
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Due to combining the features of both brushless servo systems and stepper systems, Leadshine easy servo systems are ideal solutions for both upgrading conventional stepper systems, and replacing many brushless servo systems.
While conventional stepper systems are typically adopted for applications of 1,000 RPM or below, Leadshine easy servo systems can easily upgrade your motion control systems to the speed of 2,000 RPM (even higher) with much fast acceleration, much lower heating , higher torque, no loss of steps, smoother motor movement. In comparison to brushless servo systems, Leadshine easy servo systems can power control systems with much high starting & low-speed torque, no hunting, no overshooting, zero setting time, lower costs, and no tuning for most of applications.
Leadshine easy servo systems have been successfully implemented by hundred of OEM clients in the world in tens of industries such as CNC machinery, electronics, CMM measuring / inspection, medical, lab automation, semiconductor, scientific instruments, textile, etc.