110 1220 Infinity II LC System User Manual
6
Injection System Description
Autosampler
The transport assembly uses four stepper motors driven in closed-loop mode
for accurate positioning of the gripper assembly for sample-vial transport. The
rotational movement of the motors is converted to linear motion (X- and
Z-axes) by toothed belts connected to the drive spindles. The rotation (theta
axes) of the gripper assembly is transferred from the motor by a toothed belt
and series of gears. The opening and closing of the gripper fingers are driven
by a stepper motor linked by a toothed belt to the planetary gearing inside the
gripper assembly.
The stepper motor positions are determined by the optical encoders mounted
onto the stepper-motor housing. The encoders monitor the position of the
motors continually, and correct for position errors automatically (e.g. if the
gripper is accidentally moved out of position when loading vials into the vial
tray). The initialization positions of the moving components are sensed by
reflection sensors mounted on the flex board. These positions are used by the
processor to calculate the actual motor position. An additional six reflection
sensors for tray recognition are mounted on the flex board at the front of the
assembly.
Supported Trays for the Autosampler
Half-tray combinations
Half-trays can be installed in any combination enabling both 2 mL- and
6 mL-vials to be used simultaneously.
Numbering of vial positions
The standard 100-vial tray has vial positions 1 to 100. However, when using
two half-trays, the numbering convention is slightly different. The vial
positions of the right-hand half tray begin at position 101 as follows:
Left-hand 40-position tray: 1 – 40
p/n Description
G1313-44510 Tray for 100 x 2 mL vials
G1313-44513 Halftray for 15 x 6 mL vials
G1313-44512 Halftray for 40 x 2 mL vials
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