DELTA ECMA-FA1308RS ASDA-A2 Series High-Torque AC Servo Motor

Medium-Inertia Rotary Motion Overview

The ECMA-FA1308RS (ECMA-FA1308RS) is an industrial synchronous AC servo motor engineered by Delta for high-precision position, speed, and torque control within the premium ASDA-A2 system architecture. Operating at a rated output power of 850 W, this electric commutation motor delivers an exceptional torque density of 5.41 N-m under a continuous 7.1 A current draw. In heavy-duty automation setups such as industrial printing presses, high-speed plastic extrusion systems, precise multi-axis CNC milling heads, and automated metal bending machinery, the ECMA-FA1308RS optimizes trajectory tracking and prevents unscheduled machinery downtime through its high-resolution multi-turn absolute encoder and rugged 130 mm frame block. Its specialized high power rating ($21.52\text{ kW/s}$) guarantees crisp acceleration dynamics across the plant floor.

Part Number Technical Nomenclature

Delta utilizes a precise alphanumeric coding sequence to specify the exact mechanical layout and electrical parameters of the ECMA motor series:

• ECM: Electrical Commutation Motor (Product Core Technology)

• A: AC Servo Motor (Driving Logic Class)

• FA: High-Performance F-Series Design Platform

• 13: 130 mm motor frame flange size

• 08: 850 W standard rated output power capability

• R: Multi-turn absolute encoder configuration (17-bit single-cycle / 16-bit multi-cycle matrix)

• S: Outfitted with a standard keyway (including fixed screw holes), heavy-duty oil seal, and zero mechanical brake assembly

Critical Mechanical & Electrical Specifications

The following performance parameter matrix details the mechanical, electrical, and environmental limits verified for equipment system layout engineering:

Technical Knowledge Base & Common Inquiries

What are the specific functional capabilities of the built-in 17-bit/16-bit absolute encoder?

The absolute encoder system utilizes a dual-layer tracking matrix. The 17-bit single-cycle layer registers 131,072 unique angular points within one 360-degree rotation to control velocity ripple. The 16-bit multi-cycle layer tracks up to 65,536 complete mechanical revolutions independently. This layout permits the automation system to retain actual axis coordinates permanently, eliminating the need for homing cycles or physical limit switches after major facility power outages.

How does the missing mechanical brake on this model impact vertical axis configurations?

Because this specific model code designates a "w/o brake" (without brake) physical assembly, the motor shaft turns freely when the matching ASDA-A2 servo drive is in a "Servo Off" state or when the main facility power drops. For vertical lift axes or loaded structural hoists, an external electromagnetic brake system must be integrated onto the mechanical drivetrain to prevent gravity-driven load drops during emergency stops.

What performance role does the 12.55 ms electrical time constant play in operation?

The electrical time constant ($12.55\text{ ms}$) represents the physical interval required for the motor windings to reach 63.2% of their maximum current capacity after voltage application. This quick responsiveness, balanced against a tiny 2.43 ms mechanical constant, enables the matched ASDA-A2 drive amplifier to execute high-bandwidth current loops, providing stiff position clamping during high-torque load shocks.

Field Commissioning & Safety Guidelines

• Absolute Multi-Turn Battery Backup Configuration: Because the multi-turn absolute encoder retains mechanical revolution logs across system power drops, you must wire an external 3.6 V lithium battery to the designated encoder cable battery compartment. Always change this backup battery while primary 220 VAC drive logic power is active to prevent wiping out the absolute encoder position data stored in memory.

• Shaft Load Limits and Oil Seal Lubrication: When aligning the 130 mm flange to rigid industrial gearheads or multi-groove timing pulleys, use a dial indicator to keep radial and axial misalignments within specified engineering tolerances. Excessive structural loads compromise the integrated oil seal lip and cause premature bearing failure. Ensure the oil seal is continuously splashed with standard gear lubricant to avoid dry friction wear against the shaft.

• Power and Encoder Shielding Layout: Connect the motor power line and the 17-bit feedback absolute encoder run via independent, separate braided shielded cables. Route these cables through isolated panel wire ways with a clear separation of at least 150 mm. Ground the copper braid tightly to the central panel star-ground bus bar to isolate the digital encoder data packets from the high-frequency PWM voltage spikes emitted by the drive amplifier.