MLC Multi-Leaf Collimator - Ra

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MLC
“Did not clear before
slowpass”
T-nuts
T-nuts
T-nuts
From the Hyper Terminalen we can test the slop on each T-nuts
with this command:
diagLeafBacklashAll 1,5,2; diagLeafBacklashAll 2,5,2;
1: Select between bank A or B
5: Indicates how many times each leaf is tested
2: Tells how the results should be presented
T-nuts
Average of the 5 measurements = 103,8 counts
103,8 / 512 counts/mm = 0.203 mm
T-nuts
•
A position or intensity af deviation
indicates that the tolerance in the
backlash test is overdue for both leaf.
T nut skifte
Positionsafvigele (mm)
0.4
0.3
0.2
0.1
Før
Efter
0
-0.1
-0.2
-0.3
0
10
20
30
40
MLC-bladpar nummer
50
60
T-nuts
T nut skifte
Positionsafvigele (mm)
0.4
0.3
0.2
0.1
Før
Efter
0
-0.1
-0.2
-0.3
0
10
20
30
40
MLC-bladpar nummer
50
60
T-nuts
To large distance
between leafs
Here are both leafs
out of position
T-nuts
Here are the
distance between
the leafs to small
T-nuts
T-nut slør
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