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GSK980TDi Turning CNC System User Manual
520
Ⅲ
Connection
compensation table is a compensation amount by executing a positive movement 10.000mm from
origin. So there is an offset point every 10.000. No.061value in the compensation table is a
compensation amount by executing a negative movement 10.000mm from origin. So there is an
offset point every -10.000. No.59 is a compensation amount at -10.000~-20.000mm. Therefore the
point N is set by an offset of move from (N-61) × (offset interval) to (N-60) × (offset interval).
The following table content is resulted from the above:
Actually as the machine moves from point -30.000 to the point +10.000, the pitch error offset is:
(-7)+(-7)+(+6)+(+4)=(-4)
Data
③
parameter No.098 (pitch error origin) =127, No.099 (offset interval) =10.000
When the pitch error origin is set to 255:
The offset value for the 1
st
segment is set by the position No.255 in the offset table, the offset
value for the 2
nd
segment is set by the position No.254 in the offset table, and the offset value for the
Nth segment is set by the position No.256-N in the offset table.
The machine zero is regarded as the reference point of pitch error origin, the system
compensates the compensate amount set by No.255 in the offset table from the machine zero to the
negative direction. So the pitch error compensation can be executed when the machine coordinates
are less than 0.
The position No.255 is an offset value from reference point to -10.000mm, No.254 value in the
table is the one from -10.000mm to -20.000mm, so there is an offset point every -10.000. Therefore
the point N is set by an offset of move from (N-256)×(offset interval) to (N-255)×(offset interval).
Above is the example of the following offset interval error.
Machine coordinate
system
Offset parameter
No.
Offset
value
Drive unit current
code pulses before
compensating
Drive unit current
code pulses after
compensating
-30.000 058
-7
-30000
-29992
-20.000 059
-7
-20000
-19999
-10.000 060
+6
-10000
-10006
Reference point 0
0 0
10.000 061
+4
10000
10004
…… 062
…
