Yaskawa FSP Amplifier - Manual (Page 94)

FSP Amplifier User’s Manual Chapter 5: Parameter Settings and Functions
5-27
5. Set the parameters.
Reduce the electronic gear ratio to lower terms so that both A and B are
integers smaller than 65535, then set A and B in the respective
parameters:
Pn202 Electronic Gear Ratio (Numerator)
⎟
⎠
⎞
⎜
⎝
⎛
A
B
Pn203 Electronic Gear Ratio (Denominator)
Parameter Signal Setting Control Mode
Pn202
Electronic Gear Ratio
(Numerator) Range: 1 to 65535
Default Setting: 1 Position Control and
Programming
Pn203
Electronic Gear Ratio
(Denominator) Range: 1 to 65535
Default Setting: 1 Position Control and
Programming
Set the electronic gear ratio according to equipment specifications.
M
Electronic
gear
B _
A
Motor
FSP Amplifier
Reference
input pulse
Electronic Gear Ratio =
⎟
⎠
⎞
⎜
⎝
⎛
A
B
=
203 Pn
202 Pn
• B = [(Number of encoder pulses) × 4] × [motor speed]
• A = [Reference units (travel distance per load shaft revolution)] ×
[load shaft revolution speed]
„ Electronic Gear Setting Examples
The following examples show electronic gear settings for different load
mechanisms.
Ball Screws
Travel distance per load shaft revolution =
in 00004 . 0
in 24 . 0
= 6000
Electronic gear ratio
=
⎟
⎠
⎞
⎜
⎝
⎛
A
B
=
6000
1 x 4 x 2048
=
203 Pn
202 Pn
Pn202 8192 Preset
Values Pn203 6000