The BS0710-USB board is a complete Unipolar/Bipolar dual stepper motor
controller system which can be controlled from a computer using a USB
connection. It includes the capability of driving one or two stepper
motors, each of which being either unipolar (4-pole) or bipolar (2 pole).
This unit is a good choice for those designing products using linear
actuators, especially since the micro stepping features will reduce noise
levels and can increase positional accuracy by a large amount.
The board is specified as allowing up to 1 amp per winding, with 6.5 to 15
volt motors supported when in single power supply mode. It also supports a
dual power supply feature, wherein the motors use a separate supply from
the logic circuits; in this mode, up to a 34 volt power supply may be used
for the motors.
Key Benefits:
USB communications with a host computer may be used to control the board.
TTL-Serial communications may be used to control the board using an
external microprocessor, such as a Basic Stamp or SX.
Up to two stepper motors may be independently controlled at one time.
Each motor may be either 4-pole Unipolar or 2-pole Bipolar.
Four modes of stepping the motor are supported:
Half steps (alternates 1 winding and two windings enabled at a time)
Full power full steps (2 windings enabled at a time)
Half power full steps (1 winding enabled at a time)
Near-constant-current microsteps (each from 1/64 to 1/2 of a full step)
A TTL "busy" signal is available, which can be used to see if the motors
are still moving. This information is also available from the serial
communications subsystem.
Simple control of the motors may be done by switch closure: i.e., each
motor can be told to slew left or right, or to stop by simply grounding
some input lines. Similarly, the rate of motion can be controlled via
stepping through a standard set of rates via grounding another input.
Complete control of the motors, including total monitoring of current
conditions, is available through the 2400 to 19,200 baud serial connection
(by default, this is shipped configured for 9600 baud).
Runs off of a single user-provided 6.5 to 15 volt DC power supply.
