Parker: Brushless Servo Drives OEM 675 Series (OEM675)

Brushless Servo Solutions For the OEM

The Making of a Servo System

Servo systems rely on feedback devices to continuously correct for errors in current or torque, velocity, and position. A typical servo system includes a servo controller, amplifier, and motor with a feedback device. The servo amplifier can have varying degrees of complexity and performance. A torque amplifier (e.g. OEM670T) controls only the current loop. A positioning servo (e.g. OEM670SD, OEM675X) accepts encoder feedback to close the position loop.

The OEM670 Family

The OEM 670 family consists of the OEM670 and the OEM675 series of servo drives. These products bring high performance in a small, low cost package. The OEM670 family offers a cost effective solution to a number of fractional horsepower brushless servo applications. The OEM670 family was designed to operate with Compumotor’s SM, NeoMetric, and J Series motors or any standard three phase brushless DC servo motor equipped with Hall effect sensors. The OEM670 family uses three-state current control for efficient drive performance and cooler motor operation. These servo drives are high performance modules which the Original Equipment Manufacturer (OEM) can use to design a motion control system. The OEM670 family products are small and convenient to use. Units install with only two screws (the screws also provide grounding and captivate the cover). Their right-angle screw terminal allows side-by-side mounting, and their small footprint maximizes cabinet space. The snap-on molded cover is removable for system configuration and helps provide a barrier against environmental contamination. The drives are the same size as a 3U Eurorack card. Their standard 25-pin D connector is compatible with universally available connectors.

Computer Programmable Stand-alone Servo Drives

Compumotor’s OEM670X and OEM675X drive/controllers are stand-alone fully integrated servo systems for fractional horsepower applications. Designed to provide greater flexibility and user convenience, the single-axis OEM670X and OEM675X incorporate a built-in RS-232C based controller in the same small package for quick, easy programming. Users can program seven sequences and utilize five programmable inputs and two programmable outputs per unit.

Brushless Servo Drives For High-Volume Applications:

Compumotor’s OEM670 and OEM675 Series of servo drives were designed for the needs of OEMs and high-volume users with a fractional horsepower motion control application. These products were developed to provide performance, compact packaging, reliability, and power. The OEM670T and OEM675T are torque amplifiers utilizing a ± 10VDC analog input making them directly compatible with industry standard motion controllers. The OEM670SD and OEM675SD drives use the same command interface found on most step motor amplifiers, allowing an easy upgrade from step motors to the higher performance levels found in brushless servo systems. Although the voltage and current are the same for the OEM670 and OEM675, the OEM670’s current compensation loop is optimized for NeoMetric and J Series motors; the OEM675’s current compensation loop is optimized for SM and SE motors. We recommend that you use the OEM670 with NeoMetric and J Series motors, and use the OEM675 with SM and SE motors. This provides optimum system transient response for better system performance (easier tuning, better settling time, etc.)

Features:

Performance
• Torque Mode operation with OEM670T and OEM675T

• Step & Direction operation with OEM670SD and OEM675SD

• Three-state current control for more efficient drive and cooler motor operation

• Configurable current fold-back

• Plug-in resistors for peak and fold-back current

• Six-state drive design with hall effect sensors for commutation

• Operates with brushless or brushed servo motors

• Several Brushless Servo motors are available from Compumotor providing up to 190 oz-in continous and 570 oz-in peak torque

Reliability :

• Short circuit protected—phase-to-phase and phase-to-ground

• Overvoltage circuitry protects the drive from large inertial loads

• Status/fault LED indicators to confirm proper operation

• Enclosed packaging reduces danger of environmental contamination

• Overtemperature circuitry protects the drive from excess heat

Packaging

• Application-specific integrated circuit (ASIC) and surface mount technology minimize product footprint, overall package size, and increase product reliability

• Removable snap-on molded cover for convenient configuration and protection against contaminants

• Heat is dissipated through the mounting surface

• Install with only two screws (also provides grounding and captivates cover) • Universally available standard 25-pin D connector

• Right-angle screw terminal allows side-to-side mounting, or Eurorack compatibility

Power:

• Provides 6 Amps continuous current and 12 Amps peak current

• Single 24-75 VDC power supply input

Fully Integrated Controller and Brushless Servo Drives For High Volume Applications:

The OEM670X and OEM675X were designed for the needs of OEMs and high-volume users with a fractional horsepower motion control application. Compumotor’s OEM670X and OEM675X fully integrated servo systems combine the power, compact packaging, and reliability of the OEM670T/OEM675T torque servo amplifiers with a simple, programmable, built-in, RS232C based servo controller. Users can program seven sequences and have five programmable inputs and two programmable outputs per unit. The OEM670X and OEM675X are ideal for less demanding motion control applications such as rotary indexing, step-andrepeat, and linear positioning. The “X” version is a costeffective, single-axis servo system to meet your high-volume application needs. Although the current and voltage are the same for the OEM670 and OEM675, the OEM670’s current compensation loop is optimized for NeoMetric and J Series motors; the OEM675’s current compensation loop is optimized for SM and SE motors. We recommend that you use the OEM670 with NeoMetric and J Series motors, and use the OEM675 with SM and SE` motors. This provides optimum system transient response for better system performance (easier tuning, better settling time, etc.).

Features:

Performance:

• Servo controller and drive in one small package

• Standard RS-232C serial communications interface

• Optional 2 kBytes of battery-backed RAM to store up to 7 command sequences (-M2 option)

• Daisy chaining up to 256 units on one serial port

• Five configurable inputs for remote sequence select, trigger, and home limit, and two dedicated limit inputs.

• Two programmable outputs for machine interaction

• Operates with standard differential, optical encoder for velocity and position feedback

• PID control algorithm used for servo tuning

• Several AC Brushless Servo motors are available from Compumotor providing up to 190 oz-in continous and 570 oz-in peak torque

Reliability

• Short circuit protected: phase-to-phase, and phase-toground

• Overvoltage circuitry protects the drive from large inertial loads

• Status/fault LED indicators to confirm proper operation

• Enclosed packaging reduces danger of environmental contamination

• Overtemperature circuitry protects the drive from excess heat

Packaging

• Application-specific integrated circuit (ASIC) and surface mount technology minimize product footprint, overall package size, and increase product reliability

• Removable snap-on molded cover for convenient configuration and protection against contaminants

• Heat is dissipated through the mounting surface

• Install with only two screws (also provides grounding and captivates cover)

• Universally available standard 25-pin D connector

• Right-angle screw terminal allows side-to-side mounting, or Eurorack compatibility

• Overall dimension 5.0 x 3.6 x 1.6 in (127 x 9 x 41 mm)

Power :

• Provides 6 amps continuous current and 12 amps peak current
• Single 24-75 VDC power supply input