Driveset 1-axis with CS-D508 and 3Nm closed loop motor CS-M22430

Click here to download the data sheets and documentation

Package advantage: 5% discount on the individual prices of the set
 

These steppermotors have incremental encoders for position feedback Position evaluation is performed by an optical encoder with 1000 lines, which provides 4000 edge changes per revolution. As soon as a position deviation appears, it is immediately compensated by the electronics: Step losses do not occur. 

This 2-phase closed loop motor with encoder is designed to operate with the Leadshine hybrid servo controller CS-D508, an encoder extension cable is required, we offer this in various lengths. The driver together with these controllers forms a closed-loop system, which combines high dynamics, high torque for the size and low heat generation. Due to the encoder-position-feedback no step losses occur anymore.

This product combines the advantages of stepper motor drive and servo drive, such as.

• no step losses due to position feedback
• less heat generation
• less vibrations
• lower current consumption
• high dynamics

In most cases, these drives are ready for immediate use and do not require complex tunings such as servo motors to run stably.
 

The following parts are required for a complete drive system:

• Closed-Loop Motor (This item)
• Driver Leadshine CS-D508
• Encoder extension cable type H-BMxM0 (optional in 3m, 5m, 8m, 10m, 12m length)
• Additional: Programming cable, with the free ProTuner Software this cable allows for a data connection to a pc to tune the system settings.

Application areas:

• Ideal for milling machines, lathes, robots, winding machines or general positioning.
• Compatible with CNC controls such as Beamicon. Estlcam, Mach3, Eding, Linuxcnc and many more.

Technical data:

• Torque: 3Nm
• Shaft diameter: 8mm
• Shaft length: 15 mm
• Centering diameter: 38 mm
• Total length without shaft: approx. 102 mm
• Flange dimension: NEMA24 / 60x60mm
• Hole spacing: 50,00 mm (Non standard!)
• Encoder with 1000 pulses per revolution

Advantages in handling:

• No tuning necessary as with servo motors
• Simple control via standard pulse/direction signals (PUL/DIR) and enable signal
• Compact size facilitates installation
• 2 signal LEDs green and red indicate the status of the drive
• Settings can be made via DIP switches or software
• Parameters can be transferred to PC via RS232

Safety features

• No step losses and high position accuracy due to position feedback
• Error output allows reaction to error conditions
• Quiet and uniform motor running at low speeds avoids resonances
• High efficiency due to variable current control technology
• Integrated overcurrent protection, overvoltage protection, step loss detection increase safety

Advantages over JMC integrated stepper motors

• Better electronics because there is more space for sufficiently dimensioned components
• Better cooling, because driver and motor are separated
• Dust-tight operation possible, motor is encapsulated, driver is housed in control cabinet
• Longer life technology.

Specifications:

Hybrid servo information

Conventional open-loop stepper systems work in open-loop mode, i.e. position control without feedback. When stepper motors run under load in an open loop, a potential loss of synchronization between commanded and actually executed steps can occur, known as "stall" or "step loss". In the past, this was corrected by adding a feedback device such as an optical encoder that monitors the "current" position. However, this conversion can only alert, not correct, step losses.

When an application requires real-time position control during motion, engineers have been forced to rely on servo systems and the complexity and cost associated with them. In many applications, because traditional servo systems lack high torque compared to stepper motor systems, expensive planetary gears had to be added to achieve the desired torque.

Through the implementation of high-resolution encoders, which feedback the motor position every 25 microseconds, closed-loop stepper drives guarantee real-time controlled position accuracy without loss of steps as with open-loop stepper motor systems.

Attention: There are systems which call themselves "closed-loop" and also work with encoders, but which have no field-oriented control including sinusoidal commutated current control. Although they check the step position, they cannot compensate for step angle errors during movement.

Our closed-loop systems have field-oriented control, i.e. they compensate step losses during movement and correct load angle errors within a full step!

Unlike open-loop stepper motor systems where the current is constant, closed-loop stepper motor systems vary the output current and are optimized based on motion and load. As a result, closed-loop stepper motor systems generate higher torque, less motor heating, less vibration and less noise than open-loop stepper motor systems.

Compared to brushless or brush servo systems, the costs for closed-loop stepper motor systems are significantly lower. In addition, they offer much higher torque, easy adjustment and configuration, no overshoot, and no in- and outward oscillation (hunting). In many low to medium applications, closed-loop stepper motor systems can be the better solution than servo systems.

Closed loop drives for automation 

What are closed-loop stepper motors?

Closed-loop stepper motors combine the advantages of stepper and servo motor technology. They are smoother running and have lower resonance than stepper motors, offer position feedback and control, short settling and decay times, and no longer exhibit step loss.

They are an alternative to stepper motors when energy efficiency, smooth running and high load tolerance are required. Compared to servo motors, they have advantages in terms of high torque at low speeds, short settling times, correct positioning without hunting, and a lower price with often smaller size.

When are closed-loop stepper motors a good alternative?

• When high torque is required at speeds up to 1000 rpm and a compact, low-cost solution is needed that does not require a gearbox.
• When simple and fast commissioning without complex tuning is required.
• When a low-cost drive is required as an alternative to servo motors.
• When a load must be held in position at standstill (e.g. Z-axis of a milling machine).
• When the typical hunting behavior of servo motors leads to tracking errors that are intolerable for the application. Servo motors overrun their position in the event of sudden load changes and must then be corrected.