Fuji Electric ALPHA5 Smart - PA1_05 Number of Command Input Pulses Per Revolution; Numerator 0 of Electronic Gear, PA1_07 Denominator of Electronic Gear

CHAPTER 4 PARAMETER
4-12
Basic Parameters
4
 Forward/Reverse rotation
The servomotor rotates forward if it rotates counterclockwise (CCW:
figure on the right) when the output shaft is viewed from the front.
Clockwise rotation is reverse rotation.
PA1_05 Number of command input pulses per revolution
No. Name Setting range
Default
value
Change
05
Number of command
input pulses per
revolution
0: Electronic gear ( PA1_06/07) is enabled
64 to 1048576 [pluse]: Number of command
input pulses per revolution is enabled.
0 Power
This parameter is enabled only under position control.
Enter the number of command pulses necessary to rotate the servomotor a full turn.
The setting range is 64 to 1048576 pulses. However, if the end of the model number of the servomotor
is "HB2" (18-bit encoder), the maximum value is 262144 pulses.
With the default value ("0"), the settings of PA1_06 and _07 (electronic gear numerator and
denominator) are enabled.
PA1_06 Numerator 0 of electronic gear, PA1_07 Denominator of electronic gear
No. Name Setting range
Default
value
Change
06 Numerator 0 of electronic gear 1 to 4194304 16 Always
07 Denominator of electronic gear 1 to 4194304 1 Always
These parameters are enabled only under position control.
With these parameters, the traveling amount of the mechanical system per each command pulse is
adjusted to a unit amount.
If parameter PA1_05 is "0," the settings of these parameters are enabled.
The following equation is used to calculate.
 Equation of numerator 0 of electronic gear and denominator of electronic gear
Cancel down so that numerator 0 divided by the denominator of the electronic gear is an integer
(4194304 or less).
* The unit amount is the machine travel amount to one command pulse. Its unit is [unit].(mm/pulse.
degree/pulse = [unit])
* The number of encoder pulses is 262144 for an 18-bit encoder or 1048576 for a 20-bit encoder.
(Unit amount)
=
Forward
rotation
=
×
×
(Traveling amount of mechanical system per servomotor revolution)
Number of encoder pulses *
Numerator 0 of electronic gear
Denominator of electronic gear
(Unit amount) *
Numerator 0 of electronic gear
Denominator of electronic gear
Number of encoder pulses
(Traveling amount of mechanical system per servomotor revolution)