Theory Of Operation; Overview; Drive System - Abbott VP 2000 Service Manual

Technical Data

Theory of Operation

Overview

Drive System

3-14
The Abbott VP 2000 Processor is a microprocessor controlled
using a PC that directs all functions including robotic and
temperature controls. The PC provides access for programming
custom protocols. An optional printer can be connected to the
PC to document slide processing events.
In operation, The unit moves the Slide Basket Right and Left,
lowers the basket into a staining well, and raises it. The Slide
Basket is fitted into a slotted arm protruding down from the
Robotic Arm. The Robotic Arm is attached to a Y-Table
Assembly. This assembly is attached to an X-Table Assembly.
Together they constitute the X/Y Table Assembly.
Operation is controlled by a microprocessor and drivers on the
Computer Control Board as described in the section on System
Control.
To move the Slide Basket, the entire X/Y Table Assembly moves
left and right during operation. It has four (4) guide wheels
that allow it to run along on horizontal Drive Rails that are
attached to the Drive Plate. X-direction movement is powered
by the X-motor - a 12 VDC, uniphase, stepper motor mounted
on the Drive Plate. The X-motor shaft rotates a Drive Pulley on
the Right end of the Drive Plate. The X-drive belt is attached to
the Drive Pulley and to an Idler Pulley on the Left end of the
Drive Plate. A tension spring mounted on the Front side of the
Drive Plate keeps the required tension on the Drive Belt.
Also mounted on the S/Y-Table is a metal tab that acts as the
X-Position flag. This tag intersects photo interrupter sensors
on the X-Sensor board (mount on the Drive Plate) to generate
data on the position of the X/Y Table, and thus the position of
the Slide Basket.
Section 3
Abbott VP 2000™ Processor Service Manual
30-608308//R1—September 2008