ABI Prism® 7900HT Sequence Detection System ... - OpenWetWare

Defining the
Positions of the
Remaining Stacks
7-38 System Maintenance
To find the bottom of the stack: (continued)
Step Action
13 Click the Vertical Home.
14 While holding the plate, click Open Gripper and remove the plate.
15 Click the Vertical Adjustment text field, type –3200, and press Enter.
The plate handler lowers the arm to a position near the base of the output stack.
16 Carefully lower the plate handler arm until it is approximately 1–2 mmfromthe
bottom of the stack.
17 Click Vertical Offset,clickYes, and record the number in the Vertical Adjustment text
field.
The software records the vertical position for position 0 (the output stack).
18 Click Vertical Home.
The plate handler raises the plate handler arm to its highest position.
19 Click the Vertical Adjustment text field, type the Vertical Offset value determined in
step 5, and press Enter.
The plate handler lowers the plate handler arm to a Vertical Offset position.
20 If necessary, readjust the Vertical Offset value and repeat steps 6 and 7 until
satisfied with the setting.
To define the positions of the remaining stacks:
Step Action
1 Place an empty plate into input stack 2 (Zymark position 5).
2 From the Zymark Twister Software, click position 5.
The plate handler arm moves over the input stack.
3 Using the Vertical Positioning commands, lower the plate handler arm until it is
approximately 1 cm above the stack and center it using the Rotary Adjustment
arrows.
4 Carefully lower the plate handler arm into the stack. Center the gripper as it moves
down the stack by adjusting the Rotary Adjustment arrows as needed.
5 Once the plate handler arm is centered within the stack, click Find Plate.
The plate handler arm lowers upon the plate.
Confirm the following:
♦ The plate is in the middle of the gripper span.
♦ The plate sensor switch is contacting the plate.
♦ The gripper does not contact the side of the stack.
6 Click Close Gripper.
7 Click Vertical Home.
The plate handler arm raises to its highest position. If the plate contacts the sides of
the stack, re-adjust the rotary position of the plate handler arm until the plate moves
freely in the stack.
Note Contact between the plate and the stack or all stacks may be unavoidable.
However, try to minimize the contact as much as possible.