PyroTec™ PRO Hardw are User’s Manual, V1.2 39
RT-MN024-1.2 02/21
System
Each pipetting channel of the Air LiHa is equipped with an individual plunger drive to vary
the volume of the air chamber in the Z-rod.
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.
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.
A Encoder
B Motor
C Z-rod
D Tip adapter
E DiTi cone
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