Mitsubishi Electric M800VS Series - Using a Rotary Axis as Basic Axis

M800VS/M80V Series Connection and Setup Manual
24 Setting the Machine Error Compensation
24.2 Bidirectional Pitch Error Compensation
491
IB-1501613-A
24.2.2.2 Using a Rotary Axis as Basic Axis
This section describes how to set bidirectional pitch error data by taking a rotary axis having a pitch error such as illustrated
below as an example.
Set the pitch error compensation data for an rotary axis in the same way as a linear axis.
However, note the following points.
 Set the interval between two division points so that the last division point will be 360 degrees.
 The sum of the compensation amounts set with the incremental amount method will always be "0".
 The compensation amount of the terminal point in the absolute amount method (360 degrees) will always be "0".
[Parameter settings]
[Compensation amount settings]
Parameter
#4001 #4002 #4003 #4004 #4005 #4006 #4007 #4008 #4009
cmpax drcax rdvno mdvno pdvno sc spcdv twopc refcmp
Setting value C C 4122 4123 4134 1 60.000 1 4
Division point number #4123 #4124 #4125 #4126 #4127 #4128 #4129 #4130 #4131 #4132 #4133 #4134
Compensation
amount
Absolute amount method -4 -2 -2 4 6 0 -4 -2 -4 -6 -2 0
Incremental amount method -4 2 0 6 2 -6-4 2 -2-2 4 2
Movement direction Positive Negative
#4124#4123 #4126 #4127
2
1
-1
-2
-3
(-2) (1) (0) (3) (1)
(-2)
(-1)
(-3)
3
#4125
(-2)
(-1)
(-3)
#4128
(0)
(-1)
(2)
(-1)
(3)
(0)
(-2)
(-2) (1) (-1) (-1) (2)
(1)
#4130#4129 #4132 #4133
#4131 #4134
Bidirectional pitch error (rotary axis)
nsation amount in
positive direction
l amount method)
Error
Direction of reference
position return
nsation amount in
negative direction
l amount method)
nsation amount in
negative direction
e amount method)
Error amount in negative direction
Error amount in positive direction
Basic axis machine coordinate
Reference when the movement
direction is negative
nsation amount in
positive direction
e amount method)
360
degrees