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  • Step and direction control

  • Closed position loop for no loss of movement synchronization

  • Operating voltage: 20-50 VDC

  • Load based output current of 0.5 - 8.0 A

  • High torque at starting and low speed

  • No torque reservation

  • High stiffness at standstill

  • Significantly reduced motor heating

  • Smooth motor movement and extra low motor noise

  • Quick response, no delay and zero settling time

  • No loss of steps; no hunting; no overshooting

  • Plug-and-play and no tuning

ES-D508 is one of the models in Leadshine ES-D series easy servo drives which can take 20-50 VDC input voltage and output 0.5 - 8.0 A continuous load-based current. It is capable of driving NEMA 17, 23, 24 and 34 (1-2 stacks) easy servo motors (stepper motors with encoders) with the position loop closed in real time.


Based on latest DSP technology and adopting Leadshine's advanced control algorithm, ES-D508 easy servo drive applies servo control on easy servo motors. When adopted with an easy servo motor, it combines features of both open loop steppers & brushless servo systems, and offers many unique advances features for excellent motion control system performance.


Same as servo drives in traditional brushless servo systems, an ES-D508 easy servo drive takes encoder feedback from a driven ES-M series easy servo motor to close the position loop and eliminate the possibility of lose of movement synchronization. Therefore, loss of steps which limits adoption of stepper systems is totally eliminated in ES-D508 driven easy servo systems. Compared with constant output current in open loop stepper drive, output current from an ES-D508 servo drive to the driven motor is load based. When torque requirement is low, the output current is automatically lowered to the level of "just enough". But when the torque requirement is high, an ES-D508 easy servo drive can boost the output current quickly, up to 8.0A. This can significantly improve control system response time, offer excellent acceleration performance, and reduce motor heating by as much as 50% over open-loop stepper systems. Also, there is no torque reservation needed for an ES-D508 driven easy servo system. In an ES-D508 driven easy servo system, it always allows 100% torque implementation available from the driven easy servo motor and thus improves system high speed performance by as much as 30% over comparable open loop stepper systems. In addition, smoothness and quietness are also significantly improved in ES-D508 driven easy servo systems over steppers.


Compared with traditional brushless servo systems, cost for ES-D508 driven easy servo systems is significantly lower.  They also outperform comparable traditional brushless servo systems for the features of much higher low-middle speed torque, high standstill stiffness, no hunting (shaking), no overshooting, and almost zero settling time. In addition, plug-and-play setup for almost all applications makes ES-D508 driven easy servo system much simple to set up, over hard-to-configure brushless servo systems which usual involve configurations of tens of parameters.


When an ES-D508 easy servo drive is implemented with a Leadshine ES-M series easy servo motor, there is No Configuration Needed for almost all applications. The output resolution of ES-D508 with the output resolution defaulted to output resolution of 2,000 pulses per resolution (equal to 10 microstep in 2-phase stepper systems). With Leadshine configuration software, ProTuner, an advanced user can also set custom settings of resolution, current & position loop parameters, idle current percentage, etc.


ES-D508 driven easy servo systems have been widely adopted by many Leadshine OEM clients to upgrade their open-loop stepper systems or replace brushless servo systems in industries such as CNC machinery, electronics, semiconductor, medical, textile, robotics, lab automation…

Technical Data

Output current0-8.0   (Peak)A
Input voltage203650VDC
Logic signal current71016mA
Pulse input frequency0-200kHz
Isolation resistance500



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