Omron OMNUC U Series User Manual page 72

Operation
3-5-2 User Parameter Chart
PRM Parameter name
No.
Cn-00 System check mode
Cn-01 Setup parameter no. 1
Cn-02 Setup parameter no. 2
Cn-04 Speed loop gain
(See note 1)
Cn-05 Speed loop integration
constant
Cn-12 Brake timing
Cn-17 Torque command filter
time constant
Cn-1A Position loop gain
Cn-1b Positioning completion
range
Cn-24 Electronic gear ratio G1
(numerator) (see note 2)
Cn-25 Electronic gear ratio G2
(denominator) (see note 2)
Cn-26 Position command accel-
eration/deceleration time
constant
Note 1. Cn-04 (speed loop gain) is factory set for three times the load inertia. Therefore, if the load
inertia is extremely small, some oscillation may occur. If it does, then lower Cn-04 to 20 or
less.
Note 2. After the settings for Cn-24 (Electronic gear ratio G1 (numerator)), and Cn-25 (Electronic gear
ratio G2 (denominator)) have been made, they become effective when the power is turned on
again after having been cut off. (Check to see that the LED display has gone off.)
3-5-3 Electronic Gear
j Function
The motor will be driven with a pulse determined by multiplying the command pulse count by the
electronic gear ratio.
The electronic gear is useful for the following applications:
To fine-tune the position and speed of two lines that must be synchronized.
When using a positioner with a low command pulse frequency.
To set the machine movement per pulse to a specific value, such as 0.01 mm.
j Setting User Parameters
The electronic gear is set as G1 divided by G2 (G1/G2). G1 is set in user parameter Cn-24; G2 is set
in Cn-25. The target pulse count is computed as follows:
3-14
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Factory Unit
setting
--- ---
--- ---
--- ---
80 Hz
20 ms
0 10 ms
100 µs
4
40 1/s
3 Command
units
4 ---
1 ---
0 0.1 ms
Setting Explanation
range
--- Refer to system check mode
explanation.
--- Refer to setup parameter no. 1
explanation.
--- Refer to setup parameter no. 2
explanation.
1 to 2,000 Adjusts speed loop response.
2 to 10,000 Speed loop integration
constant.
0 to 50 Delay time setting from brake
command until servo turns off.
0 to 250 Setting for torque command fil-
ter time constant (6.4 to
398 Hz).
1 to 500 For position loop response ad-
justment.
0 to 250 Sets the range for the position-
ing completion signal output.
1 to 65,535 Setting range
0.01 0.01 G1/G2 G1/G2
1 to 65,535
0 to 640 Sets the setting number for
smoothing.
Chapter 3
100 100