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5
Chapter 2
Overview
2.1
Introduction
The BSC202 and BSC203 2- and 3-channel Stepper Motor Controllers are the next
generation of enhanced controllers using the familiar APTUser interface. Many new
features are provided, including a choice between trapezoidal and S-shaped velocity
profiles, a higher theoretical microstep resolution (409600 for a 200 full step motor)
and speeds more than twice that achieved by its predecessors.
They are designed to drive larger framed 2-phase bipolar stepper motors, with and
without encoder feedback, and can be used in a wide variety of applications. These
high power units deliver up to 48V/50W peak (25W average) drive power per channel
and are compatible with most stepper driven nano-positioning actuators & stages in
the Thorlabs range.
The unit combines the latest high speed digital signal processors (DSP) with low-
noise analog electronics and ActiveX® software technology for effortl ess high
resolution microstepping of up to three axes. Additional axes can be driven by
connecting one or more b enchtop units via a standard USB hub.The apt stepper
motor controller is supplied with a full suite of software support tools. An intuitive
graphical instrument panel allows immediate control and visualization of the operation
of the stepper controllers, and any other controllers that are installed in the system.
See Chapter 5 for a full description of the apt system software.
Fig. 2.1 APT Three Channel Stepper Motor Controller (BSC203)