Omron R88D-GT series, Руководство пользователя

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5-16
5-8 Electronic Gear
5
Ope
rati
ng Func
tions
5-8 Electronic Gear
Function
• The Servomotor can be rotated for the number of pulses obtained by multiplying the command
pulses by the electronic gear ratio.
• This function is effective under the following conditions:
• When fine-tuning the position and speed of two lines that are to be synchronous.
• When using a position controller with a low command pulse frequency.
• When you want to set the machine travel distance per pulse, to 0.01 mm for example.
Parameters Requiring Settings
*
1. The Electronic Gear Switch Input (GESEL) is used to switch between Electronic Gear Ratio Numerator 1 (Pn48) and
Electronic Gear Ratio Numerator 2 (Pn49).
Operation
Calculation Method
• The following equation shows the relation between the number of internal command pulses (F)
multiplied by the electronic gear ratio and the number of command pulses (f) per Servomotor
Parameter
No.
Parameter name Explanation
Reference
page
Pn48
Electronic Gear Ratio
Numerator 1
*1
Set the pulse rate for command pulses and Servomotor trav-
el distance.
The upper limit of the gear ratio numerator is determined by
the following formulas.
• Electronic Gear Ratio Numerator 1
Pn48
×
2
Pn4A
≤
4,194,304/(Pn4D+1)
• Electronic Gear Ratio Numerator 2
Pn49 × 2
Pn4A
≤ 4,194,304/(Pn4D+1)
Pn48: Electronic Gear Ratio Numerator 1
Pn49: Electronic Gear Ratio Numerator 2
Pn4A: Electronic Gear Ratio Numerator Exponent
Pn4D: Smoothing Filter Setting
Any higher setting will be invalid, and the numerator will be
4,194,304/(Pn4D+1). If the numerator is 0, the encoder res-
olution will be automatically set to the value of the numerator
and the number of command pulses per rotation can be set
in Pn4B.
5-78
Pn49
Electronic Gear Ratio
Numerator 2
*1
Pn4A
Electronic Gear Ratio
Numerator Exponent
Pn4B
Electronic Gear Ratio
Denominator
Electronic Gear Ratio Denominator (Pn4B)
×
2
Electronic Gear Ratio Numerator Exponent (Pn4A)
Electronic Gear Ratio Numerator 1 (Pn48)
or
Electronic Gear Ratio Numerator 2 (Pn49)