ABB 3HAB5957-1 Channel smart card

The DMC-18x2 can control stepper motors. In this mode, the controller provides two signals to connect to the stepper motor: Step and Direction. For stepper motor operation, the controller does not require an encoder and operates the stepper motor in an open loop. Chapter 2 describes the proper connection and procedure for using stepper motors. DMC-18x2 Functional Elements The DMC-18x2 circuitry can be divided into the following functional groups as shown in Figure 1.1 and discussed below

The main processing unit of the DMC-18x2 is a specialized 32-bit Motorola 68331 Series Microcomputer with 2 Meg RAM and 2 Meg Flash EEPROM. The RAM provides memory for variables, array elements and application programs. The flash EEPROM provides non-volatile storage of variables, programs, and arrays. It also contains the DMC-18x2 firmware.

Motor Interface

 Galil’s GL-1800 custom, sub-micron gate array performs quadrature decoding of each encoder at up to 12 MHz. For standard servo operation, the controller generates a +/-10 Volt analog signal (16 Bit DAC). For sinusoidal commutation operation, the controller uses 2 DACs to generate 2 +/-10Volt analog signals. For stepper motor operation, the controller generates a step and direction signal. Communication The communication interface with the host PC contains a bi-directional FIFO (AM4701) and includes PC interrupt handling circuitry. General I/O The DMC-18x2 provides interface circuitry for 8 TTL inputs and 8 TTL outputs. The general inputs can also be used for triggering a high speed positional latch for each axis. System Elements As shown in Fig. 1.2, the DMC-18x2 is part of a motion control system which includes amplifiers, motors and encoders. These elements are described below.

Motor 

A motor converts current into torque which produces motion. Each axis of motion requires a motor sized properly to move the load at the required speed and acceleration. (Galil's "Motion Component Selector" software can help you with motor sizing). Contact Galil for more information. The motor may be a step or servo motor and can be brush-type or brushless, rotary or linear. For step motors, the controller is capable of controlling full-step, half-step, or microstep drives. An encoder is not required when step motors are used.

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----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------

PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module

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Module, redundancy module, power module, relay output module, relay input module, processor module

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