ETS Series AC Servo User's Manual
4.6.2 Setting the Clear Signal
（1）Setting the Clear Signal
When the /CLR signal is set to low level, clear error counter:
·The error counter inside the servo drive is set to“0”
·Position loop operation is disabled.
（2）Setting the Clear SignalMode
In position control mode, pulses will be still presented in the servo drive when servo OFF, thus it should be cleared when
servo drive is turned ON. Setting Pn004 to choose whether clearing the pulses automatically when servo OFF.
Clearthe error pulse when S-OFF, donot whenovertravel.
Do not clear the error pulse.
Clearthe error pulse when S-OFF orovertravel (excep for zero clamp)
4.6.3 Setting the Electronic Gear
（1）Electronic Gear
The electronic gear enables the workpiece travel distance per input reference pulse from the host controller to be set to
any value.
One reference pulse from the host controller, i.e., the minimum position data unit, is called a reference unit.
（2）Related Parameters
Use 16 bit electronic gear parameter
Use 32 bit electronic gear parameter
16 Bit Electronic Gear Ratio (Numerator)
When the Electronic Gear is Not Used When the Electronic Gear is Used
workpiece
workpiece
No. of encoder
pulses：32768
Ball screw pitch：6mm
No. of encoder
pulses：32768
Ball screw pitch：6mm
One revolution is 6mm. Therefore 10÷6＝
1.6666 revolutions.
32768×4 pulses is one revolution.
Therefore, 1.6666×32768×4＝218445
pulses. 218445 pulses are input as
reference pulses.
The equation must be calculated at the
host controller.
To move a workpiece 10mm :
The reference unit is 1µm. Therefore, to
move the workpiece 10mm (10000µm),
1pulse=1µm, so 10000/1＝10000 pulses.
Input 10000 pulses per 10mm of
workpiece movement.
To move a workpiece 10mm using
reference units:
Reference unit：1µm
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