Yaskawa UTSIH-B17CC Internal Encoder

Overview

The Omron R88M-W1K315F-S2 is a powerful AC servo motor of the 1.3 kW class and part of the R88M-W series. This series was designed for high continuous load, precise speed control and use in demanding CNC and industrial systems. Due to the robust torque behavior and compatibility with Omron W servo packs, the motor is ideal for machine tools, powerful axes and automation with high reliability.

Model designation

R88M = Omron AC servo motor series
W = W series, compatible with R88D-W servo packs
1K3 = Power range approx. 1.3 kW
15F = Rated speed/rated current and length designation
S2 = Variant with special encoder/connection configuration

Technical Data

Feature	Value
Rated power	1300 W
Rated voltage	200 V
Rated current	5.4 A
Rated torque	8.34 N·m
Rated speed	1500 r/min
Type	3-phase synchronous servo motor
Insulation	Class F
Continuous operation	CONT. 40V InS.F
Encoder	UTSIH-B17CC (Incremental, high resolution)
Compatible Drive	R88D-W series (e.g. WT series, WD series)
Brake	none specified (motor without holding brake)

Connections & Interfaces

U / V / W: Three-phase motor power connection
Encoder connection UTSIH-B17CC: High-resolution incremental encoder, Omron-type circular connector
PE: Protective earth on the housing
Connector system: Omron Heavy-Duty connector (motor/encoder separate)

Control board / Assemblies

3-phase stator winding
Permanent magnet rotor
Encoder UTSIH-B17CC (incremental encoder, 17-bit class)
Temperature sensor in the stator
Double ball bearing front/rear
Electrical connection modulation (terminal block)

Alarms & Troubleshooting (Top 10 – typical errors on the compatible R88D-W servopack)

Code	Bezeichnung	Typischer Befund	Prüfung	Abhilfe
A.16 / A.40	Encoder Error	Feedback fehlt	CN2, Leitungen, Steckverbinder	Encoder/Kabel ersetzen
A.41	Phase Error	Phasen falsch angeschlossen	U/V/W prüfen	richtig anklemmen
A.10	Overcurrent	mechanical blockage	Motor manuell drehen	Mechanik prüfen
A.72	Überlast	konstante hohe Last	Lastprofil prüfen	Last reduzieren
A.24	Ground Fault	Wicklung gegen Erde	Isolationsmessung	Motor/Kabel ersetzen
A.30	Regeneration Error	Bremsenergie zu hoch	Bremswiderstand messen	größeren RB einsetzen
A.20	Communication Error	Encoder-Signal instabil	Durchgang der Leitungen	Kabel ersetzen
A.50	Motor Overheat	Fühler löst aus	Temperatur prüfen	Kühlung/Last prüfen
A.31	Overspeed	unplausibles Feedback	Encoder-Z-Spur prüfen	Encoder/Kabel ersetzen
A.32	Overcurrent (Drive)	Endstufe überlastet	U/V/W getrennt testen	Drive prüfen

Typical applications

Machine tools with high mass inertia loads
Turning, milling, portal and vertical axes
Automated lifting and transport systems
Presses, axis controllers, feed systems
Industrial handling and robotics modules

Service notes

Regularly monitor noise and temperature behavior
Check encoder connectors and cables for kinks and oil exposure
Do not perform insulation measurement on the connected motor
Observe bearing condition during operation (vibration, noise)
Keep the environment clean (avoid dust, oil, coolant)

Repair description

Incoming inspection: visual inspection, insulation measurement, winding resistance, encoder line test
Disassembly & cleaning: open motor, clean stator/rotor, expose bearings
Analysis: Inspection of bearings, windings, temperature sensors and encoder signal quality
Repair: Replacement of defective bearings, cleaning of the interior, replacement of the UTSIH-B17CC encoder if necessary
Testing & load test: functional test on the R88D-W servopack, control of current consumption, smooth running, torque behavior
Endurance test & conclusion: continuous operation under rated torque, thermal stability test, create final report