SYSMEX CA-500 - 2.8 Z-AXIS DRIVE UNIT

CA-500 Series S/M 2-9 Revised December 2001
2.8 Z-AXIS DRIVE UNIT (Z-AXIS BASE ASSEMBLY)
2.8.1 Outline
To use the sample probe for aspiration or draining and to move reaction tubes, this unit grips the catcher and
drives it in Z direction. The Z-axis base assembly incorporates a mechanism for mixing plasma and reagent in
reaction tubes.
2.8.2 Specifications/Functions
(1) Z-Direction System
Drive Source: Unipolar type stepping motor (1-2 phase excitation, constant current drive)
Drive transmission: Timing belt type
Resolving power: Approx. 0.08 mm/step
Drive speed: Approx. 3100 pps (at high speed in trapezoidal control)
Sensor: For drive unit home position (transmission type) - 1 unit
(2) Stirring Function
Power source: DC motor (Driving voltage: 1.05 V)
(3) Reaction tube Presence Detection
Sensor: Detects presence of reaction tubes (modulation-reflection type) - 1 unit
(4) Sample Probe
Shape⋅Material: ID 0.50 mm/OD 0.85 mm, SUS316
Heater:
Sensor: Glass chip thermistor
Overheat protection: Thermal fuse 76°C
2.8.3 Assembly Diagram
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