Application Guide for Pulse and Direction Stepper Systems Including the integration of Glentek digital pulse-stepper servos with Sound Logic Breakout boards and Artsoft Mach series software Applications Guide Revision Date: 03 Nov 2008
TABLE OF CONTENTS Table of Contents .................................................................................................. 3 Overview ............................................................................................................... 4 Servo Motor Versus Stepper Motor ....................................................................... 5 Selecting a Glentek Servo Motor to Replace a Stepper Motor ............................. 7 How to Choose the Correct Amplifier ..................
Application Guide Overview This guide is designed to assist the customer with the integration of Glentek’s Amplifiers and Motors to their systems, utilizing high response micro stepping servos instead of low resolution stepper motors. The difference between stepper motors and servo motors with high resolution encoders will be pointed out and examples will be given. Also an overview of Glentek servo motors and amplifiers will be provided.
Servo Motor Versus Stepper Motor Stepper motor versus servo motor is a question that has been asked by many people with projects where they could incorporate either motor. There are many benefits that the servo system has over the stepper system. Servo motors and servo amplifiers are designed to maximize efficiency between the motor and amplifier. This is done by commanding current only when the motor has to provide torque for the system.
Application Guide The Glentek Nema 34 and Nema 42 servo motors are supplied with 5000 line encoders. This high resolution (20,0000 counts per revolution) provides a smoother higher bandwidth velocity loop for fine machining finishes.
Selecting a Glentek Servo Motor to Replace a Stepper Motor This section provides the specifications of various stepper motors so they can be compared to equivalent servo motors. This should help in clearing up some of the confusion involved in choosing a servo motor to replace a stepper. Both Servo and Stepper motors have peak and continuous torque ratings. You will notice that the peak and continuous torque ratings are generally the same with the stepper motor.
Application Guide How to Choose the Correct Amplifier Glentek produces a wide range of amplifiers. Some amplifiers have built in DC power supplies, referred to as “Stand Alone”, while others are referred to as a module that requires customers to furnish DC power supply. Glentek also offers 2 and 4 axis packages with power supply for multi-axis systems. If the applications requires a NEMA 23, 34 or 42 motor, Glentek recommends using the SMB/SMC 9715 or SMB/SMC 9808 amplifiers.
Sound Logic Breakout Board The Sound Logic breakout board can be used with a Glentek motor and drive combination. The Sound Logic board enables a customer to use their computer to send pulses to this board. This board then sends these pulse and direction signals to the amplifier. The board connects directly to the parallel printer port on a standard computer. In the future, the breakout board will be able to be controlled by the standard USB port as well as the parallel printer port.
Application Guide Artsoft Controls Software Artsoft Controls software enables a computer to turn a manual milling machine into a computer controlled machine. This software was used in conjunction with the Sound Logic breakout board to effectively evaluate the needs of the CNC community. This software is complex for the novice user. However, Artsoft has many forums where help can be found and Artsoft also offers phone technical service.
Advantages of using Glentek Microstepping Servo Amplifiers Glentek Omega series digital PWM servo amplifiers offer the latest in high performance DSP control of both brushless and brush type motors. With extensive utilization of surface mount technology and special heat transfer techniques, the Omega series offers one of the world’s most powerful products for a given form factor. Following are some of key features of Glentek high performance servo amplifiers: 1.
Application Guide Brushless versus Brush-type Comparison There are two basic types of motor design that are used for high-performance motion control systems: Brush-Type PM (permanent magnet), and Brushless-Type PM. As you can see in the figure, a brushtype motor has windings on the rotor (shaft) and magnets in the stator (frame). In a brushless-type motor, the magnets are on the rotor and the windings are in the stator.
Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A.
Omega Series Digital PWM Brushless Servo Amplifiers • PWM (Pulse-Width-Modulated) Brushless servo amplifiers to 20KW Analog Brush Type Servo Amplifiers • • Linear Brush type servo amplifiers to 2.6KW PWM (Pulse-Width-Modulated) Brush type servo amplifiers to 28KW Analog Brushless Servo Amplifiers • • Linear Brushless servo amplifiers to 3.5KW PWM (Pulse-Width-Modulated) Brushless servo amplifiers to 51KW Permanent Magnet DC Brush Type Servo Motors • • Continuous Torques to 335 in. lb.
