DCB-261/DCB-264
OEM SERIES
MICROSTEP DRIVERS
WITH
PROGRAMMABLE CONTROL
OVERVIEW
The DCB-261 and DCB-264 offer low
cost alternatives for operating small to
midsize stepping motors. They combine
programmable control, including over 30
sophisticated motion commands, with
efficient, bipolar chopper drive output for
high performance operation. All that is
required for operation is a single, unregu-
lated power supply and a motor.
The DCB-261 has a (peak) output current
rating of 1.2 amps/phase for operating
small stepping motors. The DCB-264
provides 4.0 amps of power to drive the
larger NEMA 23 and 34 size motors. Both
models offer microstepping resolution of
1/8, 1/4, 1/2, full and wave drive mode.
FEATURES
Programmable control
Efficient bipolar, chopper drive
Full, half, microstep and wave drive
Single power supply input
2k bytes of non-volatile memory
Limit, Home, Go, Stop and Jog inputs
Step and Direction inputs
Serial communication (1-32 axes)
Adjustable run current setting
Automatic hold current adjust
Programmable accel/decel ramping
Constant velocity commands
Heat-sink mounted
DRIVER
For maximum performance, both models
utilize a bipolar chopper drive circuit with a
20kHz chopping rate. The input voltage
range is from 24 to 40Vdc. The run current
is set via a potentiometer. To eliminate
excess heat generated by the motor, the
hold current can be programmed to a
reduced current setting at the completion
of a move.
CONTROLLER
The on-board controller provides powerful
step and direction output signals to the
driver that produce step rates in excess of
20,000 steps per second. A 24 bit position
register tracks steps within a 8,388,607
step range. An instruction set of over 30
commands, including: loop on port, count
delays, set/clear ports, limit and home
sensor inputs, provides flexibility and
programming ease.
BLOCK DIAGRAM
POWER SUPPLY
The DCB-261 and DCB-264 use a single,
unregulated +24 to 40Vdc power supply.
The on-board 5 volt logic power is derived
from the motor power supply.
SERIAL INTERFACE
Full duplex serial communications, with an
RS-422/485 "Party Line" interface, helps to
ensure reliable communication in harsh
industrial environments. This protocol also
permits simultaneous communication (to
32 axes) with minimum command process-
ing latency.
PROGRAMS
Using a host computer or dumb terminal,
programs can be stored in non-volatile
memory (2k bytes) and initiated via the
serial communication port, the "GO"
input or auto-power-up.
INTELLIGENT
CONTROLLER
BI-POLAR
CHOPPER DRIVER
SERIAL INTERFACE
POWER SUPPLY
STEP
MOTOR
INPUT SIGNALS
Input signals include: Home, Limit A,
Limit B, Go, Soft Stop and Ground. (Step,
Direction and Jog available with Rev. B).
All signals have a 5 volt range.
USER I.O.
Three input ports are available that can
test and branch to multiple motion
subroutines. Two programmable outputs
are also available to drive solid state
relays and other devices. A separate
"TRIP" function provides automatic
program branching when a specified
position is passed.
COMMANDS
SPECIFICATIONS
Electrical
Output Current (Peak)
DCB-261..............................................................................................................1.2 Amps
DCB-264..............................................................................................................4.0 Amps
Input Voltage............................................................................................................... +24 to 40Vdc
Step Resolution............................................................................................. 1, 1/2, 1/4, 1/8, Wave
Chopping Frequency.............................................................................................................. 20kHz
Non-Volatile Memory.......................................................................................................2k Bytes
Position Counter...............................................................................................................
8,388,607
Thermal
Operating Temperature...................................................................................................0 to +50
0
C
Storage Temperature................................................................................................. -40 to +125
0
C
Plate Temperature (max)......................................................................................................... +70
0
C
Mechanical
Size..................................................................................................................... 4.13 x 5.20 x 1.38 in.
Weight...................................................................................................................................... 8.0 oz.
Mounting Dimensions
ACCESSORIES
SIN-8............ RS-232/RS-422 Serial Line Converter and Cable
SIN-10.......... Intelligent Serial Line Converter
BLC-51.......Interconnect Cable
AM Series Stepping Motors
2 Townsend West, Nashua, NH 03063-1277 603-882-1447 FAX 603-881-7600
ASCII Description
ESC
Abort/Terminate
@
Soft Stop
^C
Reset
+
Index in Plus Direction
-
Index in Minus Direction
[
Read NV Memory
]
Read Limits, Hardware
\
Write to NV Memory
I
Selective Termination
^
Read Moving Status
A
Port Read/Write
C
Restore/Initialize
D
Divide Step Rates
E
Enable Auto Power Down
F
Find Home (SPS)
G
GO from Address
H
Resolution Mode
I
Initial Velocity (SPS)
J
Jump to Address
K
Ramp Slope
k
Special Trip
L
Loop on Port
M
Move at a Constant Speed
O
Set Origin
P
Program Mode
Q
Query Program
R
Index to Target Position
S
Store Parameters
T
Set Trip Point
V
Slew Velocity (SPS)
W
Wait "N" Milliseconds
Y
Set Hold Current
X
Examine Parameters
Z
Display Position
PDF 
ZIP