Parker FL-20-C Series, Руководство по эксплуатации продукта

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128
4
）
Instruction
The deceleration ratio is n/m, electronic gear numerator is B, and electronic gear denominator is
A, so the setting value of electronic gear ratio is:
Note: The deceleration ratio is n/m where m is the rotation of the servo motor and n is the
rotation of the load shaft.
B/A=Po304/ Po305=(No. of encoder pulses×4/travel distance per load shaft rotation)×
（
m/n
）
The actual meaning of electronic gear is:
Command pulse input
Pulses numbers are X
Y=X
×
A
B
A
B
Position command
* If the ratio is outside the setting range, reduce the fraction (both numerator and denominator)
until you obtain integers within the range. Be careful not to change the electronic gear ratio
(B/A).
Electronic gear ratio setting range: 0.01 ≤ Electronic gear ratio (B/A) ≤ 100
If the electronic gear ratio is outside this range, the control precision will decrease.
Ex
：
The following example shows electronic gear ratio settings for ball screw which pitch is
6mm.
Servo
motor
17 bits encoder
The deceleration
ratio is 1
Pitch is 6mm.
Fig 7-2-2 Setting electronic gear
Step Operation Calculation
1 Check machine specifications. The deceleration ratio is 1:1 and the pitch is
6mm.
2 Check the number of encoder
pulses. 17 bits encoder
3 Determine the command unit used.
The command unit is 1μm.
4 Calculate the travel distance per
load shaft rotation.
6000μm/1μm=6000
5 Calculate the electronic gear ratio. B/A=(131072/6000) ×1/1
6 Set parameters. 2003h-05h=8192 2003h-06h=375