Sep

 

 
STP100
STP101
The STP100 and STP101 Stepper Motor Controllers are the perfect choice for small to medium stepper motor applications where step positioning to 32 bits is required. The STP10x Stepper Motor Controllers are divided into four functional blocks (Embedded Microprocessor, Stepper Logic, Motor Driver Circuit, and Serial Line Drivers). The embedded microprocessor gives the STP10x Stepper Motor Controller the ability to keep track of an absolute motor position. Among other things, the position is a signed 32-bit number. Other features of the STP10x Stepper Motor Controller that are microprocessor controlled include: 

Motor acceleration and deceleration 
Human readable command set 
Multiple board command processing 
Cued commands 
STP100 board status queries: 
(Motor Position, Pin Conditions, etc.) 

The stepping logic for the STP10x Stepper Motor Controllers are supplied by a SGS Thompson Stepper Chip with built-in current limiting and step logic. The driver chip supplies up to two Amps per stepper motor winding. The STP10x Stepper Motor Controllers have the ability to drive both RS-232A and RS-485 serial lines. 

The STP10x Stepper Motor Controllers accepts commands in the form of serial data from a host computer and outputs amplified control signals for a bipolar stepper motor. There are four general purpose I/O lines that can be used for detecting home positions or motor limits. In addition, two of the I/O lines can be configured as 8-bit analog to digital converters. 
 

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  With the addition of a PONTECH PP232-485F you can take advantage of the STP10x Stepper Motor Controllers onboard RS-458 multiple drop network connection for addressing up to 255 boards. Cued commands can then be used for controlling two or more axis systems. 

Possible uses for the STP100 Stepper Motor Controller include automated manufacturing systems, x-y tables, and robotics. 

STP100 Features:

  • RS232 or RS485 interface 
  • Addressable up to 255 boards 
  • Controls Bi-polar Stepper Motors up to 2 Amps/phase 
  • Chopping current limiting 
  • Full, half or wave step modes 
  • Acceleration/deceleration ramping 
  • Speed, direction, position changing while motor is in motion 
  • 32-bit absolute position tracking 
  • 4-bit digital I/O for home limits 
  • Over temperature protection 
  • Power Supply (Motor) : 5VDC to 46VDC 
  • Power Supply (Logic) : 7VDC to 15VDC 
  • May use one supply if motor supply is in range of logic supply 
  • Dimensions: 4.3" x 2.4" x 1.1" 

STP101 Features:

  • All the great features of the STP100 plus the following...
  • Single supply operation from 8VDC to 46VDC
  • Seperate holding / running current setting
  • Easier current limit setting
  • Bias resistors installed for optical bump sensors

 STP100 FAQ (Frequently Asked Questions)
 

The sample interface code below uses QBasic to communicate with the STP100 Stepper Motor Controller.  

OPEN "COM1:9600,N,8,1" FOR RANDOM AS #1
DO
  PRINT: PRINT "**STP100 Controller**
  INPUT "Board ID Number   :"; ID$
  INPUT "Position of Stepper   :"; Position$

  PRINT #1,"BD";ID$
  PRINT #1,"MI";Position$
LOOP
Below is a sample screen of above program when run.  
**STP100 Controller**
Board ID Number  : 1
Position of Stepper   : -200
Enable Board with ID # = 1 move Stepper to position -200  
**STP100 Controller**
Board ID Number  : 0
Position of Stepper   : 0
Returns all steppers to home position if ID # = 0, all STP100 Stepper Motor Controller boards will be enable  
**STP100 Controller**
Board ID Number  : 2
Position of Stepper   : 1000

Enable Board with ID # = 2 move Stepper to position 1000 

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