Lonza PyroTec PRO Hardware User Manual page 39

The Pipetting
Each pipetting channel of the Air LiHa is equipped with an individual plunger drive to vary
System
the volume of the air chamber in the Z-rod.
Z-Brake Since each Z-rod of the Air LiHa has its own plunger drive, the Z-rod's weight may cause
the channel to move down when the instrument is switched off. For that reason, the Air
LiHa is equipped with a Z-brake that inhibits the Z-rod from moving down by its own
weight.
If the Z-rods are blocked in their uppermost Z-position by the Z-brake, the axes cannot ini-
tialize anymore. In that case, the Z-brake needs to be released so that the Z-rods can be
moved down manually.
For moving the Z-rod manually, the Z-brake needs to be released.
PyroTec™ PRO Hardw are User's Manual, V1.2
Air LiHa Z-rod
The figure shows two Z-rods in spread
position to show how they are arranged.
The plunger drives are alternately mounted
on the right or left side for odd an
even-numbered channels.
This arrangement allows for moving the
Z-rods completely together (to minimum
spreading distance "x"), while the drives
overlap each other.
A Encoder
B Motor
C Z-rod
D Tip adapter
E DiTi cone
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RT-MN024-1.2 02/21