HEIDENHAIN iTNC 530 HSCI Technical Manual page 685

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July 2013
Reduced error model using a position error of a rotary axis (e.g. C axis) –
Recommendation for transformation chain:
NR
DOC
X0C
Y0C
EAC
EBC
-EBC
-EAC
[END]
The position errors calculated and averaged from several axis positions are
entered here.
The position error C0C can be corrected in machine parameter MP960.
Inverse transformation is necessary to be able to compensate one specific
axis (if information about all axes is not available, for example). Describing this
axis therefore restores the ideal kinematics model.
Reduced error model using a component error (with integrated position
errors) of a linear axis (e.g. X axis) – Recommendation for transformation
chain:
NR
DOC
X0C and EXC
Y0C and EYC
EZC
EAC
EBC
-EBC where C=0 Trans
-EAC where C=0 Trans
-EZC where C=0 Trans
-Y0C and -EYC
where C=0
-X0C and -EXC
where C=0
[END]
The error ECC must be corrected conventionally in the COM file (columns 1 - 18).
The position errors A0C and B0C that are relative to the home position of the
C axis are integrated in the compensation values of the COM file (component
errors). These values must be re-transformed to be able to return to the ideal
model when the axis is in home position.
6.4 Axis-error compensation
KEY
AXIS
...
Trans
X
Trans
Y
Trans
A
Trans
B
MachAxis
C
Trans
B
Trans
A
...
KEY
AXIS
...
X
Trans
Trans
Y
Trans
Z
Trans
A
Trans
B
MachAxis
C
B
A
Z
Trans
Y
Trans
X
...
COORD
COMPTAB
xxx
xxx
xxx
xxx
-xxx
-xxx
COORD
COMPTAB
A..C1
A..C2
A..C3
A..C4
A..C5
-xxx
-xxx
-xxx
-xxx
-xxx
685

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