Mechanical Settings
Installation Manual Version 001 BRUKER 31 (167)
The sample now has to be maneuvered to the exact center of the shim system,
while the column is kept in the upright position. To accomplish this, adjust the dis-
tance between the sample changer and the magnet by rotating the four adjustable
arm assemblies (Figure 4.1.
, Figure 4.7.). Adjust the arm direction by loosening
its fixture on the column. Let down the sample in short steps while adjusting. If the
pincher seems to get too close to the light barrier cylinder, then the whole arm has
to be lifted.
Once the sample is centered, complete the following steps to verify the correct
arm position:
Arm down. (ARV)
Lift on. (LIVE)
Pincher open (ZAUF).
Let the sample float a few seconds on the cushion of air to allow it to stabilize.
Close the pincher (by releasing the ZAUF switch).
The arm position is correct when the pincher holds the sample 25 mm above the
spinner. If necessary, adjust the arm’s height and repeat the sequence: lift on,
pincher open, wait, pincher closed, until the setting is correct.
Cabinet and Magazine Belt Adjustment 5.2.2
Following the pneumatic arm setting procedure, keep the sample in the pincher in
the same position it was grasped after the sample lift. Perform the following steps
to check the position of the cabinet with the magazine belt:
Sample lift off (LIVE).
Arm up (ARO).
Arm to magazine (ARMA).
Arm down slowly (ARV).
Rotate the cabinet slightly if the sample, when approaching the magazine, is not
centered perfectly in the sample holder of the magazine belt (see Figure 5.5.
).
Move the arm further down.
If the inward position of the vertical cylinder is not correct, then see section 5.2.3
,
Vertical Cylinder Adjustment. If the spinner tip edge gets too close to the sample
holder (less than 5 mm) move the cabinet further down. The correct distance be-
tween the spinner top edge and the magazine should be approx. 5 mm as shown
in Figure 5.5..
Vertical Cylinder Adjustment 5.2.3
The vertical position of the vertical cylinder is factory set and normally does not
need any adjustment. However, if it becomes absolutely necessary, the cylinder
can be shifted vertically and horizontally by loosening the support bracket (Figure
5.5.). Generally the vertical position should be kept at a 90 mm position.
Caution:
Do not tighten the support bracket too much, as this will damage the thin
cylinder walls.
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