Mitsubishi Electric M800W Series, Connection And Set Up Manual

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M800W/M80W Series Connection and Setup Manual
27 Setting the Machine Error Compensation
535 IB-1501268-K
27.3.2 Setting Method
This function divides one error cycle into multiple steps and compensates at each step. Positions between steps are also
compensated by the linear approximation of the values at each step.
For example, as shown in the figure below, when similar errors occur at each tooth of a gear with 256 teeth, one tooth is
regarded as one cycle, and the compensation amount at each step within a cycle is specified. Specify a value that
counteracts the effect of the errors to the compensation amounts. By using the same compensation amounts for each
tooth, the errors of the whole gear can be compensated.
Before setting parameters, refer to the next section "Error Measurement" for measuring errors.
(1) The compensation amount is the value whose sign is reversed to counteract the effect of the errors.
(2) Set compensation amounts as absolute values. Do not set relative values.
(3) The compensation amounts stored in the locations specified from "Cyclic error compensation: initial number of
compensation" (#2586 Cycstnum) to "Cyclic error compensation: number of divisions" (#2587 Cycdv) are used.
(Note) This parameter setting uses the parameters that are also used by memory-type pitch error compensation
(#4101-5999, #44001-47712). Ensure that no parameter overlapping occurs when choosing the number of the
parameter.
(4) The unit of this compensation amount is 1/10000°.
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
0.0003
0.0002
0.0001
-0.0003
-0.0002
-0.0001
0.0
6 1 2 3 4 5 7 8
. . .
Steps
A cycle
1st cycle 2nd cycle 3rd cycle
Error
256 teeth
+ direction
A period
Error
+ direction
Steps
Up/down arrows :
The compensation amount that counteracts the error.
When positioning is performed to a point between steps,
the linear approximated value of the two adjacent steps
will be used for compensation.
Cyclic error seen in each period (teeth).
[When one cycle is divided into 8 steps]