Emerging Machine Vision Technologies
Our DSP-based motion ecosystem delivers high-speed responsiveness and anti-resonance tuning for uncompromising multi-axis accuracy.
This DSP-based series delivers advanced, high-efficiency stepper motor control with anti-resonance tuning for exceptionally smooth and accurate multi-axis movements.
This high-performance module translates rapid incremental encoder signals into precise, real-time data via the 100 Mbps EtherCAT protocol for sophisticated motion tracking.
Customer Testimonials Application Note
Our Industrial I/O portfolio offers robust, high-speed data acquisition and high-isolation protection for any architecture or topology.
We combine custom-engineered lighting modules with deterministic controllers to deliver flawless, high-speed camera synchronization for machine vision.
VisionXpert provides an integrated platform for rapid deployment and high-speed image analysis to ensure peak inspection performance.
Two-phase stepper motors frequently suffer from a phenomenon known as mid-range resonance. At specific operating speeds, the motor begins to vibrate violently, hum loudly, and drop significant amounts of torque. In high-precision automation equipment like Automated Optical Inspection (AOI) machines, this unwanted structural vibration introduces mechanical noise that degrades camera focus, misaligns subtle components, and accelerates physical wear on belts and bearings.
Resonance occurs when a stepper motor's discrete step-pulses match the natural mechanical resonant frequency of the motor assembly. To counteract this without upgrading to costly servo systems, modern digital motion drives utilise advanced Digital Signal Processors (DSP). The DSP continuously monitors the motor's back-EMF (electromotive force) and dynamically calculates real-time current adjustments. By injecting tiny, anti-phase current corrections into the motor coils, the drive actively dampens the resonance curve, smoothing out torque delivery and stepping behaviour.
The Industrial Motion (ViMO) Series, specifically the iM4401-01 Single Axis 2-Phase Stepper Driver and the iMU401-0N Controller/Driver, use a high-performance DSP-based architecture to provide real-time anti-resonance tuning and microstepping emulation. Capable of driving up to 4.5A on a versatile 20 VDC to 50 VDC input power loop, these modules allow engineers to use ViMO-Scope diagnostics to trace current feedback and velocity errors graphically, achieving ultra-smooth, servo-like motor profiles without manual oscilloscope tuning.
Unlike servo systems, traditional two-phase stepper motors naturally draw full electrical current even when they are completely stationary in order to maintain their holding torque. In automated machinery with frequent dwell times (like an Automated Optical Inspection bench waiting for a board to load), this continuous current dump generates massive, unnecessary heat. This thermal buildup bakes the motor coils, drives up ambient temperatures inside sealed control cabinets, accelerates component degradation, and wastes substantial factory power.
To resolve thermal issues without adding expensive external cooling hardware, intelligent drives implement an automated safety feature known as idle current scaling. Internal Digital Signal Processors (DSPs) constantly track the incoming motion pulse train. When the DSP detects that zero step pulses have occurred for a specific, preconfigured duration, it instantly triggers a down-scaling command. The drive lowers the physical coil current to a predefined percentage of its full running power—preserving enough holding torque to lock the axis in place while dramatically lowering heat output.
The Industrial Motion (ViMO) Series—comprising the iM4401-01 Single Axis Stepper Driver and the iMU401-0N Controller/Driver—features deeply customisable internal idle current scaling parameters. Operating on a wide 20 VDC to 50 VDC input range, the hardware allows engineers to define exact idle delay times and custom current drop-offs relative to the motor's peak 4.5A running current. This thermal management significantly drops internal panel heat, safeguards the driver's core electronics, and maximises motor lifespan.
Automation designers face a difficult dilemma when budgeting high-precision linear or rotary motion axes. AC Servo systems offer incredible speed and closed-loop positional accuracy, but their cost—driven by complex encoder electronics, dedicated tuning software, and high upfront prices—can quickly break a project's budget. Conversely, traditional open-loop stepper systems are highly economical but risk losing steps, stalling under unexpected loads, and introducing harsh mechanical vibrations that can compromise machine precision.
The cost-to-performance gap between these two technologies comes down to driver processing capability. Servos operate via continuous encoder feedback loops, adjusting torque dynamically by shifting current levels, which requires massive processing overhead. Traditional steppers blindly execute command pulses open-loop. However, by introducing high-speed Digital Signal Processors (DSPs) to stepper drives, modern architectures can run advanced microstepping emulation and back-EMF tracking. This fixes the mid-range resonance and stalling flaws of classic steppers, delivering near-servo smoothness and high positional confidence at a fraction of the hardware cost.
The IIES Industrial Motion (ViMO) Series bridges this budget gap by offering advanced, DSP-based step-and-direction architectures across its modular controller range. For demanding multi-axis applications, the iM4401-01 and iMU401-0N modules deliver up to 4.5A of current on a versatile 20 VDC to 50 VDC power loop. Equipped with integrated ViMO-Scope diagnostics, these modules allow engineers to trace current feedback and velocity errors graphically, achieving ultra-smooth, servo-like motor profiles without the premium servo price tag.
Industrial production lines are full of electromagnetic interference (EMI) radiating from high-voltage contactors, heavy motor starters, and robotic welding stations. When incremental encoder cables pass near these high-noise fields, electrical spikes can easily couple onto the low-voltage feedback lines. The motion controller misinterprets these transient voltage glitches as real position pulses, throwing off the internal hardware step counter and leading to progressive positional drift that ruins machine precision and forces frequent, costly re-homing cycles.
Safeguarding encoder data integrity against aggressive factory-floor EMI requires high-speed digital filtering implemented directly at the physical hardware interface. Rather than trusting incoming signals implicitly, a hardware-level digital glitch filter samples every signal transition across ultra-short, sub-microsecond intervals. If an incoming pulse fails to remain stable for the entire designated duration, the internal logic classifies it as a transient electrical noise spike and completely strips it from the counter tally, allowing only legitimate mechanical data to register.
The iM8E7N-44 1-Channel Encoder Interface Module provides absolute positional accuracy in harsh environments via an integrated programmable digital glitch filter. Running on a high-speed 100 Mbps EtherCAT protocol, the module allows engineering teams to dynamically scale noise suppression thresholds across eight specific software-selectable settings ranging from 100 KHz up to 2.5 MHz. Equipped with a robust 32-bit counter architecture, it processes rapid Line Receiver encoder signals at input frequencies up to 2.5 MHz across Quadrature (X4, X2, X1), Pulse/Direction, and CW/CCW decoding formats.
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