Function Description
STEP-200 is a 2-axis, command-
type, stepper motor controller
board. It also can be used to
control pulse-type servomotor. The
embedded CPU of STEP-200
performs the motion commands
transferred from PC to increase the
system performance. A 2K byte
FIFO is used as a command buffer.
This buffer provides 1,360ms time
buffer. Therefore, STEP-200 board is
suitable for windows operation
system. The STEP-200 board
provides DOS, Windows 95,
Windoes NT, LabView drivers. The
user may use our encoder-300
encoder interface board to work
with STEP-200 to implement a
closed-loop stepper-motor control
system.
Features
2-axis independent,
simultaneous stepper motor
control/servo motor control
(pulse input type)
DOS, windows 95, windoes NT,
LabView driver support
Embedded CPU
Command type interface
Linear, circular interpolation
Output pulse modes: CW/CCW
or pulse/direction
2500Vrms optical isolated signal
output
DDA Technology
The DDA chip is the heart of STEP-
200 board, it will generate equal-
space pulse train corresponding
to specific pulse number during a
DDA period. This mechanism is
very useful to execute pulse
generation and interpolation
function. The DDA period can be
determined by DDA cycle. When
DDA cycle set to 1, the DDA period
is equal to 8.192ms. The output
pulse number can be set to
0~2047, therefore the maximum
output pulse rate will be
249.877kpps. The minimum output
pulse rate is 0.96pps when set DDA
cycle=254 (DDA period
=1040.38ms) and pulse number=1)
Connector:
D-sub 25 connector for limit
switch and pulse output
Power Requirements:
+5V: 500mA typ.
Environmental:
Operating temp range: 0° to
60°C Storage temp range: -20°C
to 70°C Humility: 95% non-
condensing Weight: 112g
Dimensions: 167mm x 108mm
Output polarity can be
programmable
OEM version call
Applications
X-Y table control
Robotics
Mechanical positioning control
Specifications
Stepper channels: 2
Step rate: 1pps~250Kpps
Max. step count: +/- (2 –1) steps
Acceleration/deceleration:
automatic trapezoidal
acceleration/deceleration
Limit switch inputs:
5 optical isolated digital inputs
per axis (home, forward/reverse
end limit, forward/reverse high
speed limit)
Output driving capability:
15mA source current at 5V;
50mA sink current at 0.4V
Output pulse signal:
two pulse (CW/CCW) mode or
onepulse (pulse, direction)
mode.Optically couple with
330Ω pull-upresistor
Output polarity:
Positive/Negative,Programmable
32
101
Motion Board
Software
Step-200 Development Toolkit for DOS
Step-200 Development Toolkit for Win95
Step-200 Development Toolkit for WinNT
Order Description
Step-200
2-axis stepper motor controller board
Options
Step-200 LabVIEW Development Toolkit for Win95
Step-200 LabVIEW Development Toolkit for WinNT
DN-25: Terminal Board with one 9-pin
D-Sub cable and one 25-pin D-Sub cable
Figure B: Control Panel
Figure D: Customer made Machine-Control Software
Figure C: LabView environment
Figure A: Block Diagram
ISA
BUS
2K FIFO
Interface Buffer
DDA Chip
X-axis
DDA Chip
Y-axis
Connector
CPU Status
CPU
Profile Generation
Protection
Limit Switch
Input Port
Limit Switch
Input Port
Optical
Isolation
102
Motion Board