Metrohm 838 Advanced Sample Processor Manual - Manual (Page 83)

3.5 786 Swing Head settings
Metrohm 838 Advanced Sample Processor, Appendix 75
Swing radius
The swing radius depends on the length of the robotic arm
and, together with the axial distance (see above), is the most
important parameter for accurately moving to a rack position.
The distance from the robotic arm axis to the middle of the
processing head at the front of the robotic arm is decisive. The
various robotic arm models have different swing radii, see the
Instructions for Use for the 786 Swing Head.
Default values:
swing radius 112 mm
Rotation offset
The rotation offset does not normally need to be altered. It is
only used if a Swing Head is to be mounted on the tower with
a lateral displacement.
Default value:
rot. offset 0.00 mm (do not alter)
Swing direction
In principle the swing direction of the robotic arm can be se-
lected as required. If two Swing Heads are mounted on a 2-
tower model then you must take care that the two robotic arms
do not come into conflict. For this reason the robotic arm at
Tower 1 should always be mounted so that it swings to the
right and that at Tower 2 to the left.
Right-swinging mounting means: swing direction –
Left-swinging mounting means: swing direction +
Default values:
Swing direction: + (at Tower 2, swing to the left)
Adjustment rate
When the RACK command is carried out after switch-on (rack
initialization) the robotic arm is automatically adjusted to the
zero position. If the highest possible degree of positioning ac-
curacy of the robotic arm is required the rate of the adjustment
process can be reduced. However, this also lengthens the du-
ration of the automatic adjustment process, but increases the
precision.
Default value:
Adjust rate.: normal
After the settings for the robotic arm have been entered the <QUIT>
key must be pressed three times. The settings become active the next
time that the instrument is switched on.