1. General Overview
CACR-SR03TZ6SF is a customized 0.3kW AC servo amplifier of Yaskawa classic CACR-SR series, exclusively OEM-designed for Yasnac VS-800 CNC control system and Toyoda old-type machine tools. It matches Yaskawa USAGED/USAREM series 300W servo motors fitted with 15-bit absolute encoder, different from incremental encoder versions of TZ0SM/TZ0SF models. This servo has been formally discontinued by original factory and is mainly supplied as replacement spare for maintenance, overhaul and axis retrofitting of legacy CNC lathes, milling machines and small precision machining centers worldwide.
2. Model Code Definition
CACR: Standard part prefix for Yaskawa AC SERVOPACK servo drive lineup
SR: Multi-control platform supporting speed, position and torque control modes via internal parameter setup
03: Nominal rated output power 0.3kW specification
TZ: Custom mainboard with ±10VDC analog command interface dedicated to VS800 CNC system, rated AC200V input grade
6SF: Exclusive feedback circuit for 15-bit absolute rotary encoder signal decoding; "6" denotes dedicated absolute encoder hardware layout while "SF" stands for fixed OEM feedback firmware (core difference vs TZ0SM/TZ0SF incremental encoder variants)
3. Core Electrical Specifications
Main power input: 3-phase AC 200V~230V, 50/60Hz, voltage fluctuation tolerance +10%/-15%; control power adopts independent single-phase AC200V~230V power supply.
Rated continuous output current: 3.0Arms; instantaneous peak overload current reaches 8.5Arms to realize rapid acceleration/deceleration and heavy starting torque output.
Command receiving: Direct ±10VDC analog speed/position instruction from Yasnac VS-800 CNC controller; feedback interface exclusively for 15-bit absolute encoder without compatibility for regular incremental pulse encoders.
Cooling mode: Natural air convection; protection class IP20, cabinet-mounted installation only.
Ambient working condition: Operating temperature 0℃~55℃, storage temperature -20℃~+85℃; working ambient humidity ≤80%RH non-condensing; maximum installation altitude below 1000 meters above sea level.
4. Key Product Features
VS800 system fixed OEM version, factory pre-calibrated loop gain and electronic gear ratio parameters; random parameter modification easily triggers positioning error or motor runaway fault.
Full-set built-in protection functions: overcurrent, overvoltage, undervoltage, overheat, absolute encoder disconnection, overload and regenerative circuit failure protection to ensure long-term stable operation.
Compact rack-type mechanical structure, convenient for cabinet installation and quick on-site spare replacement during equipment maintenance.
Unique absolute encoder matching design improves zero-point positioning accuracy without repeated machine origin reset after power-off, an obvious advantage over incremental encoder servo types (TZ0SM/TZ0SF).
5. Typical Application Scenarios
Majorly used for feed axis drive replacement and breakdown maintenance of old CNC machines equipped with Yasnac VS-800 control system including Toyoda precision lathes and small machining centers; also applicable for precision axis modification of customized small automation equipment requiring power-off zero retention capability.
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