PARK GRIPPER
Click PARK/SAFE. The robot script provide three choice: Park Gripper, Safe Gripper, and Cancel. Choose Park Gripper. This will move the gripper next to the MD2 so that you can access the dewar.
Sanity Checks
When you PARK GRIPPER, the robot script will check the following states:
MD2 in Safe State - If MD2 is not closed, then the capillary/beamstop will be retracted.
Sample on the Goniomter - The sample sensor will detect if there is a pin on the goniometer. If a sample is present, the robot script will ask you to remove the sample or allow the robot to place the sample back in the dewar. If you choose to manually remove, the sample sensor will retract to allow you to reach the pin.
Park Gripper - Once the spindle is unoccupied, the robot script will park the gripper.
Gripper in Park Position
UN/LOAD PUCK
Click UN/LOAD PUCK. The robot script will ask you to confirm. Click YES. The robot script will then perform sanity checks before producing a menu for puck selection.
Select puck
Select a puck position. This will rotate that position directly under the opening and allow for placement of a puck. There are four positions in the dewar: A, B, C, and D. Keep track of which puck goes in which position.
Turn off Fan
After the gripper has been parked, you can access the dewar. Before pucks can be loaded, the lid must be removed and the fan blowing air across the top of the dewar must be turned off. Remove the lid and place it in the lid resting location. The switch for the fan is the black box directly below the lid resting location. Toggle the switch down to turn off the fan.
Prepare Puck
Remove a puck from the shipping cane.
Turn over the puck so that the thick part of the puck is face up.
Attach the puck pusher to the puck.
Check Puck Alignment
Orient the puck so that the notch is facing right. Load your puck into the dewar by lowering into the liquid nitrogen and feeling for engagement of the notch with the pin. When the puck is engaged, then it will not move in the dewar and the puck pusher will be perpendicular to the opening of the dewar. The puck will also be seated inside all three pins (see image). Check for engagement by trying to move the puck side to side and observing the alignment of the puck pusher.
Remove Puck Base
Once the puck is engaged, push down with the plunger (of the puck pusher) to separate the two pieces of the puck. Then lift straight up in order to avoid disturbing the pins.
Select Next Position
After loading your puck into the dewar select the next position by first clicking UN/LOAD PUCK, confirm, and then choosing the position. Due to the sanity checks, this step is slow. Repeat until up to four pucks are in the dewar.
Turn On Fan
Once all your pucks are loaded, replace the lid on the dewar and turn the fan back on.
Cool Gripper You must cool the gripper before samples can be mounted. Click COOL GRIPPER. The gripper should enter the dewar and begin cooling. Once the proper temperature has been achieved, you will be able to select a puck (click A, B, C or D) and a sample (click a number in the puck picture). Now, sample mounting can proceed.
If you click on a puck and a sample before cooling the gripper, a warning will display on the screen that you need to cool the gripper. The script will then force the gripper to cool. Click the warning to make it vanish.
