Model: AXHM450KC-GFH
Product Overview
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Technical Dossier
The Oriental Motor VEXTA AXHM series represents a mature, field-proven line of 5-phase stepper motor driver packages widely deployed across global heavy industry. Installations span petrochemical processing plants, nuclear facility auxiliary systems, oil refinery instrumentation loops, semiconductor fabrication equipment, and precision packaging lines. The AXHM designation covers integrated driver-motor combinations engineered for high-resolution positioning with minimal vibration — a critical requirement in process-critical environments where mechanical resonance causes measurement error or product defects. The series has accumulated decades of installed base across Asia, Europe, and North America, making long-term spare parts availability a primary operational concern for maintenance engineers and procurement teams.
Oriental Motor introduced the VEXTA brand as its industrial-grade stepper motion control platform in the 1970s. The AXHM sub-series emerged as a compact, self-contained driver-motor package targeting applications requiring 0.72° full-step resolution with 5-phase excitation — a configuration that delivers significantly smoother motion than conventional 2-phase designs at equivalent torque output.
Early AXHM units used analog current control circuits with DIP-switch step resolution selection. Mid-generation revisions introduced microstepping capability (up to 1/10 step), improved thermal management via aluminum heat-sink housings, and expanded input voltage tolerance. The KC suffix variants (e.g., AXHM450KC-GFH) denote the integrated driver-motor configuration with connector-type (GFH) termination, designed for panel-mount installation with standardized cable harness interfaces.
The following SKUs represent the documented VEXTA AXHM series range. Units are classified by driver output current rating and motor frame size. All models are 5-phase stepper driver-motor packages unless otherwise noted.
AXHM230KC-GFH: 5-phase stepper driver-motor, 0.23 A/phase, compact frame, connector termination.
AXHM230KC-GF: 5-phase stepper driver-motor, 0.23 A/phase, lead-wire termination variant.
AXHM450KC-GFH: 5-phase stepper driver-motor, 0.45 A/phase, standard frame, panel-mount connector type — primary SKU for this listing.
AXHM450KC-GF: 5-phase stepper driver-motor, 0.45 A/phase, lead-wire output configuration.
AXHM460KC-GFH: 5-phase stepper driver-motor, 0.46 A/phase, enhanced torque variant, connector termination.
AXHM460KC-GF: 5-phase stepper driver-motor, 0.46 A/phase, lead-wire termination.
AXHM550KC-GFH: 5-phase stepper driver-motor, 0.55 A/phase, mid-frame, connector type.
AXHM550KC-GF: 5-phase stepper driver-motor, 0.55 A/phase, lead-wire output.
AXHM560KC-GFH: 5-phase stepper driver-motor, 0.56 A/phase, high-resolution microstepping capable.
AXHM660KC-GFH: 5-phase stepper driver-motor, 0.66 A/phase, large frame, connector termination.
AXHM660KC-GF: 5-phase stepper driver-motor, 0.66 A/phase, lead-wire output, high-torque configuration.
AXHM900KC-GFH: 5-phase stepper driver-motor, 0.90 A/phase, maximum frame size, connector type.
AXHM900KC-GF: 5-phase stepper driver-motor, 0.90 A/phase, lead-wire, high-load positioning axis.
AXHM230K-GFH: Earlier generation 5-phase unit, 0.23 A/phase, without KC driver revision, connector type.
AXHM450K-GFH: Earlier generation 5-phase unit, 0.45 A/phase, predecessor to AXHM450KC-GFH.
AXHM660K-GFH: Earlier generation 5-phase unit, 0.66 A/phase, large frame, pre-KC revision.
AXHM900K-GFH: Earlier generation 5-phase unit, 0.90 A/phase, maximum torque, pre-KC driver board.
AXHM series units present specific inspection challenges due to their integrated driver-motor architecture. The driver PCB, power stage, and motor winding share a common housing, requiring functional testing under load rather than simple continuity checks. DriveKNMS applies the following test protocol to all AXHM units processed through its facility:
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