GSK 980MDc, Руководство пользователя

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Chapter 6 Screw-Pitch Compensation
369
Ⅲ
Inst
allation
②
Data parameter № 3620
（
screw-pitch error origin
）
=60
，
№ 03624
（
compensation interval
）
=10.000
Parameter № 3621 （ min. position number of each axis for pitch error compensation ） =0 ，
parameter № 3622
（
max. position number of each axis for pitch error compensation
）
=199
When the screw-pitch error origin is set to 60: For the positive moving, the compensation value for the
1
st
section is set by the position № 0061 in the compensation table. The compensation value for the 2
nd
section is set by the position № 0062 in the compensation table. The compensation value for the Nth is set
by position № 0060+N in the compensation table.
For the negative moving, the 1
st
section error compensation is set by position № 0060 in the
compensation table, the 2
nd
section by position № 059. The Nth section error compensation is set by
position № 0060-N in the compensation table.
By taking the machine zero as the reference point, the screw-pitch error origin moves from the positive
coordinate system of machine zero to compensate the corresponding position No.0061 in the
compensation table, and from the negative coordinate system to compensate the position No.0060.
Therefore the screw-pitch compensation can be done when moving in the positive or the negative
coordinate system of machine zero.
The position No.0060 in the screw-pitch error compensation parameters corresponds to the reference
point (60), compensation point 61 to a point positive10.000 moving from origin. So there is a compensation
point every 10.000 distance. The 127th offset point is the compensation at po670.000. While the
compensation point 59 corresponds to a point negative 10.000 moving from reference point. Also there is a
compensation point every 10.000 .The offset point 0 is the compensation value at -600.000 position.
Therefore, at compensation point N, set a compensation value when moving from (N-61) × (compensation
interval) to (N-60) × (compensation interval).
Above is the example of following compensation interval errors
Offset interval Offset value
0
～
10.000
+4
-10.000
～
0
+6
-20.000
～
-10.000
-7
-30.000
～
-20.000
-7
Machine
coordinat
e system Offset
parameter
No.
Offset
value
Drive unit current
command pulses
before offsetting
Drive unit current
command pulses after
offsetting
-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 …