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SECTION 2
INTRODUCTION
The IM481H is a high performance, yet low cost microstepping driver that utilizes
advanced hybrid technology to greatly reduce size without sacrificing features. The
IM481H is exceptionally small, easy to interface and use, yet powerful enough to handle
the most demanding applications.
The IM481H has 14 built in microstep resolutions (both binary and decimal). The
resolution can be changed at any time without the need to reset the driver. This feature
allows the user to rapidly move long distances, yet precisely position the motor at the end
of travel without the expense of high performance controllers.
With the development of proprietary and patented circuits, ripple current has been
minimized to reduce motor heating common with other designs, allowing the use of low
inductance motors improving high speed performance and system efficiency.
The IM481H, because of its ultra small size and low cost, can be used to increase
accuracy and smoothness in systems using higher step angle motors. In many instances
mechanical gearing can be replaced with microstepping, reducing cost and eliminating
potential maintenance.
OPTIONAL INTERFACE BOARD The INT-481 is a plug on interface board which can be
used with the IM481H to facilitate testing or in situations where panel mounting is
preferred
The INT-481 contains extra circuitry which includes: Opto isolators for step clock,
direction, enable, and reset, along with extra fault detection circuits, +5vdc supply, input
capacitor, and fault and power LED’s. Wiring is done through a 15 pin screw terminal
header. A four position dip switch is supplied for microstep resolution selection.
FEATURES
•Very Low Cost
•Ultra Miniature 1.1” x 2.7” x 0.17”
•High Input Voltage (+12 to +48Vdc)
•High Output Current (1.5 Amps RMS, 2.3 Amps Peak)
•Advanced Hybrid Design
•Replaces Mechanical Gearing for Smoothness and Positioning
•Designed for High Performance, Low Inductance Stepping Motors
•20 KHz Chopping Rate
•Up to 10 MHz Step Clock Rate
•14 Selectable Microstepping Resolutions that can be changed On-The-Fly.
•Up to 51,200 Steps/Rev with a 1.8
o
Motor
•Automatically Switches between Slow and Fast Decay for Unmatched
Performance
•At Full Step Output
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