M800VS/M80V Series Connection and Setup Manual
24 Setting the Machine Error Compensation
24.2 Bidirectional Pitch Error Compensation
489
IB-1501613-A
(1) Set the setting method for compensation amount to "#4000 Pinc".
(2) Set the axis name to be compensated to "#4001 cmpax". Set the same axis name to "#4002 drcax" as well.
(3) From the division points in the positive direction, set the compensation No. of the division point which is one point in the
negative direction from the reference position to "#4003 rdvno".
(4) Set the first and the last compensation Nos. allocated to division points to "#4004 mdvno" and "#4005 pdvno", respec-
tively.
(5) Set the compensation factor to "#4006 sc".
(6) Set the interval between division points to "#4007 spcdv".
(7) Set "#4008 twopc" to "1". The function bidirectional pitch error compensation is enabled.
(8) For "#4009 refcmp", set to the following compensation amounts after measuring the actual machine position in "Setting
pitch error compensation data".
[When "#2030 dir (-)" is set to "0"]
Compensation amount = - (Actual machine position for the reference position when the direction of travel is
negative) × 2
[When "#2030 dir (-)" is set to "1"]
Compensation amount = - (Actual machine position for the reference position when the direction of travel is
positive) × 2
In both cases, the unit of compensation amount depends on the setting of the machine error compensation unit ("#1006
mcmpunit").
[Parameter settings]
Setting parameters
#4000 setting value Setting method
0
(Absolute amount method)
This method sets the difference between the commanded position and the actual machine position of
each division point as the compensation amount.
1
(Incremental amount method)
This method sets the difference between the commanded travel amount and the actual travel amount
when the axis moved from the adjacent division point as the compensation amount.
Parameter
#4001 #4002 #4003 #4004 #4005 #4006 #4007 #4008 #4009
cmpax drcax rdvno mdvno pdvno sc spcdv twopc refcmp
Setting value X X 4103 4101 4112 1 10.000 1 4
#4101 #4103#4102
#4104 #4105 #4106
2
1
-1
-3
3
#4107 #4109#4108 #4110 #4111 #4112
-2
Bidirectional pitch error (linear axis)
Error
Direction of reference
position return
Interval between two
division points
Error amount for the movement
in the negative direction
Basic axis machine coordinate
Compensation data No. in the
negative direction
Compensation data No. in the
positive direction
Error amount for the movement
in the positive direction
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