YASKAWA VS-626M5 Instruction Manual Page 154

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1. Parameter setting
1.1 Parameter Setting Method
7-3
3) Pitch error compensation parameter setting method
Turn on the “KEY” on the “OPRT PANL” and then select the “PARA METR” screen
in MDI mode.
If the “PITCH ERR” screen does not appear, press the “” key and then “PITCH
ERR”.
Using the F-key shown below and move the cursor onto the parameter to set and
enter the setting value with the numeric key.
Press the “NO.” key and enter the parameter number. This enables to search the
parameter number.
(Temporary input)
If the wrong number is entered, press Back Space key and enter the
number again.
To cancel all the numbers that have been temporarily entered, press the “CANCEL
key. Press Key to create the entered number.
Setting Range : 127 ~ 127
No. Sets the parameter No.
Moves the cursor up/down/left/right.
Moves screen by screen.
)
Displays the NEXT menu.
a) Overview of stored pitch error compensation function
With this function, the pitch error can be compensated for each axis by
minimum distance unit. (Note that it is valid only after zero return is
performed.) After the zero return, set the tool position as compensation basis.
And set the compensation value as parameter in offset interval set for each
axis.
(1) Compensatible axis: all axes (rotational axis is also compensatible.)
(2) Compensation point: maximum total of 640 points for all axes
Maximum 256 points per axis.
(3) Compensation range
Per compensation point : 127 ~ 127
Compensation unit is determined according to diameter or radius setting.
b) Parameter setting
Pitch error parameters are set by the following parameter number.
(1) Pitch error compensation point No. for origin point (each axis) ----------
parameter No. 5420
(2) Pitch error compensation point No. for the most (-) side (each axis) ----
parameter No. 5421
(3) Pitch error compensation point No. for the most (+) side (each axis) ----
parameter No. 5422
(4) Pitch error compensation point interval (each axis) -------------------
parameter No. 1813
Pitch error compensation point has the limit for the minimum value, and
is determined by the following formula.
Minimum interval value = Maximum speed / 12000 (unit: mm, deg)
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