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The SSC1U Stepper Motor Control Interface

Control up to 16 Stepper Motors on a Network Using 1 Serial Port

The SSC1U interface circuit board can control one 4-phase unipolar stepper motor and 8 digital I/O lines with commands sent from a computers serial port. Up to 16 SSC1 system circuit boards can be connected to form a network that is controlled by commands sent from a single serial port. Stepper motor motion is performed by the SSC1U interface in the foreground while it receives commands in the background. You can send commands to read the stepper motor status word, or read the remaining step count while the stepper motor is in motion. There are 4 general-purpose digital inputs and 4 general-purpose digital outputs on each SSC1U system interface circuit board for a total of 64 digital inputs and 64 digital outputs in a network. The digital inputs have both latched and unlatched states that you can read with a system command. The input logic states of the 4 general-purpose digital inputs can be reversed at any time with a command so that a logic high input state can be represented by a logic low state. The 4 general-purpose digital inputs can also be individually programmed as a sense input to stop the stepper motor automatically when an input logic state changes. In addition, there are 2 digital inputs dedicated to sensing the stepper motors mechanical limits of travel. The Mechanical limit sense inputs can be reversed during initialization if needed. The 4 general-purpose TTL level output states can be controlled by a system command.

Figure 1 illustrates how the various components of the SSC1 system are interconnected to the SSC1U interface circuit board.

Figure 1. SSC1U Interface Interconnect

 The SSC1U Interface Technical Manual provides a detailed description of the commands, how to connect the components of the SSC1 system, and a listing of a simple QuickBasic program that illustrates how easy it is to command and control the stepper motors and digital I/O in the system. Stepper motor exerciser programs written in QuickBasic and Visual Basic are provided as a tool to help you get started with your own application program. ActiveX controls along with Visual Basic and Visual C++ programming examples that utilize the controls are also provided on the SSC1 programming examples disk. The SSC1 System ActiveX Controls documentation describes how to use the SSC1 System ActiveX  controls in your Microsoft Visual Basic and Visual C++ applications. 

The SSC1U Interface Circuit Board

4-Phase Unipolar 4.0 Amp

Circuit board dimensions: 5.0" x 4.0" x .75".

SSC1U Interface Technical Specifications

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