M800VS/M80V Series Connection and Setup Manual
24 Setting the Machine Error Compensation
24.2 Bidirectional Pitch Error Compensation
490
IB-1501613-A
(1) Move the axis to positive or negative direction, then measure and record actual machine position of each division point.
Calculate compensation amount for each division point based on the actual machine position.
The unit of compensation amount depends on the setting of machine error compensation unit ("#1006 mcmpunit").
(2) Set the calculated compensation amount to the parameter of compensation No. allocated to each division point.
[Compensation amount settings]
Setting pitch error compensation data
#4000 setting value Calculation method of compensation amount (*1)
0
(Absolute amount method)
Compensation amount = (Commanded machine position - Actual machine position) × 2
1
(Incremental amount method)
Here, the compensation amount at division point "n" is calculated for the axis moved by the "interval
between division points" as specified by #4007. The formula used to calculate compensation amount
will differ depending on whether division point "n" is on the positive side or the negative side from the
reference position.
[On the positive side]
Actual travel amount = (Actual machine position of division point "n") - (Actual machine position of di-
vision point "n-1")
Compensation amount = (Interval between division points - Actual travel amount) × 2
[On the negative side]
Actual travel amount = (Actual machine position of division point "n") - (Actual machine position of di-
vision point "n+1")
Compensation amount = (Interval between division points + Actual travel amount) × 2
Movement direction Positive Negative
Compensation data No. #4101 #4102 #4103 #4104 #4105 #4106 #4107 #4108 #4109 #4110 #4111 #4112
Compensation
amount
Absolute amount method -2 0 6 -4-4 2 -8-8-2-6-8-6
Incremental amount method 26-6-406062-6-22
Note
#4101 #4103#4102
#4104 #4105 #4106
2
1
-1
-3
(1) (3) (-3) (-2) (0) (3)
(3)
(-2)
(0) (-2)
(-1) (1)
3
#4107 #4109#4108 #4110 #4111 #4112
-2
(0) (3) (1) (-3) (-1) (1)
(-4) (-4)
(-4) (-3)
(-1)
(-3)
Bidirectional pitch error (linear axis)
Error
Direction of reference
position return
Compensation amount in positive direction
(Absolute amount method)
Compensation amount in positive direction
(Incremental amount method)
Error amount in negative direction
Basic axis machine coordinate
Error amount in positive direction
Compensation amount in negative direction
(Incremental amount method)
Compensation amount in negative direction
(Absolute amount method)
Reference when the movement direction is negative
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