6 SERVO MOTOR DRIVING
6.2 Point table mode (pt)
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6
Infinite feed function (setting degree)
This function can be used with the absolute position detection system.
The infinite feed function (setting degree) is available with servo amplifiers with software version A6 or later.
The infinite feed function (setting degree) can be used with the point table method.
When, in the point table method, the unit for position data for automatic operation or manual operation is set to degree, the
detection of [AL. E3.1 Multi-revolution counter travel distance excess warning] is disabled and the home position is retained
even if the servo motor rotates 32768 revolutions or more in the same direction. Thus, the current position is restored after the
power is cycled. For other command units, when the servo motor rotates 32768 revolutions or more in the same direction, [AL.
E3.1 Multi-rotation counter movement amount over warning] occurs and the home position is erased.
The differences depending on the position data unit when the servo motor rotates 32768 revolutions or more are shown
below.
Roll feed display function
The roll feed display function is a function to change the display method of the current position and the command position in
the status monitor. This function can be used with the incremental system and automatic individual positioning operation.
The current position and command position are displayed to start from zero each time the servo motor starts toward the target
position of the set point table. The target position can be checked with the command position before the servo motor starts.
The roll feed display function is available for servo amplifiers with software version A7 or later.
The roll feed display function can be used only in the positioning mode (point table method).
Parameter setting
PARAMETERS
Name
Digit to set
Setting value
Unit
[AL. E3.1]
Home position
erasure
[Pr. PT01]
Position data unit
_ x _ _
0
[mm]
Occurs
Yes
1
[inch]
Occurs
Yes
2
[degree]
Does not occur
None
3
[pulse]
Occurs
Yes
PARAMETERS
Name
Digit to set
Setting item
Setting
value
Setting
PA03
Absolute position
detection system
_ _ _ x
Absolute position
detection system
_ _ _ 0 (initial
value)
Be sure to set the incremental system.
This function is not available in the absolute position
detection system.
PT26
Current position/
command position
display selection
_ _ x _
Current position/
command position
display selection
_ _ 1 _
Select roll feed display.
PT26
Electric gear
fraction clear
selection
_ _ _ x
Electric gear
fraction clear
selection
_ _ _ 1
Clear a fraction of the previous command by the
electronic gear at start of automatic operation. Always set
"_ _ _ 1" (enabled) for electric gear fraction clear.
