CA-500 Series S/M 2-8 Revised December 2001
2.7 X-Y DRIVE UNIT (X-AXIS MOTOR ASSEMBLY/DRIVE-AXIS ARM ASSEMBLY)
2.7.1 Outline
This unit moves the sample probe, which aspirates and dispense plasma and reagent, to the Sample Rack,
Reagent Rack, and Reaction Tube Rack; and drives, in X-Y direction, the catcher which moves reaction tubes
from the reaction tube rack to the heater section, detector block, and further to dispense/discard hole.
2.7.2 Specifications/Functions
(1) X-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. 4500 pps (at high speed in trapezoidal control)
Sensor: For drive unit home position (transmission type) - 1 unit
(2) Y-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. 4000 pps (at high speed in trapezoidal control)
Sensor: For drive unit home position (transmission type) - 1 unit
2.7.3 Assembly Diagram
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