
3. α SERIES PARAMETER ADJUSTMENT B-65150E/04
− 64 −
<4> Fine acceleration/deceleration function setting
When level-up HRV control is used, a high position loop gain and
a high velocity loop gain are set. So, when a greater
acceleration/deceleration is specified, vibration dependent on the
distribution period may occur. To prevent such vibration, fine
acceleration/deceleration is used. Be sure to set a multiple of 8 as
a fine acceleration/deceleration time constant.
[Parameters for fine acceleration/deceleration setting]
No. 2007 (Series 16), No. 1951 (Series 15), B6:
1 (Enables the fine acceleration/deceleration
function.)
No. 2209 (Series 16), No. 1749 (Series 15), B2:
1 (The fine acceleration/deceleration time
constant is of linear type.)
No. 2109 (Series 16), No. 1702 (Series 15):
16 (Fine acceleration/deceleration time
constant)(*1)
*1 For the parameter to be used with fine
acceleration/deceleration switchable for cutting feed and
rapid traverse, see Subsec. 3.4.2, "Cutting Feed/Rapid
Traverse Switchable Function."
<5> Feed-forward coefficient adjustment
Feed-forward is used to compensate for a servo position loop
delay, and velocity feed-forward is used to compensate for a
velocity loop delay. While checking the amount of radius
reduction by using an arc of R10/F4000 or R100/F10000,
adjust the feed-forward coefficient so that the actual path
matches the command. Set a velocity feed-forward
coefficient of 100. For details of adjustment, see Subsec.
3.4.3, "Servo Parameter Adjustment Procedure for
Achieving High Speed and High Precision."
[Parameters for feed-forward setting]
No. 2005 (Series 16), No. 1883 (Series 15), B1:
1 (Enables the feed-forward function.)
No. 2092 (Series 16), No. 1985 (Series 15):
9700 to 9900 (advanced preview feed-forward
coefficient)
No. 2069 (Series 16), No. 1962 (Series 15):
Approx. 100 (velocity feed-forward coefficient)