Output Timing Selection Of Near Pass Control - Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual

Output timing selection of near pass control

This function allows the user to select the timing to output the difference (d) between the actual and the set positioning end
addresses in the continuous path control, in which the difference (d) is output during the execution of the next positioning
data.
Control details
At constant speed and At deceleration are available as the setting of the near pass output timing.
• At constant speed: The distance d is output when the next positioning data is executed at the constant speed.
• At deceleration: The distance d is output at the deceleration of V1 to V2.
In At constant speed, when V1, the command speed of the positioning data No. 1, is greater than V2, the command speed of
the positioning data No. 2, in the operation chart, the distance d is output when the next positioning data is executed at the
constant speed and the execution time is extended.
In At deceleration, the execution time is not extended and is equivalent to the set execution time of the positioning control.
The following shows the operation chart of Output timing selection of near pass control.
• Acceleration/deceleration (setting)
• Acceleration/deceleration with the near pass function (actual one)
Positioning execution time
when "At constant speed" is
selected
T ≥T
21 1
Positioning execution time
when "At deceleration" is
selected
T =T
22 1
7 CONTROL SUB FUNCTIONS
228
7.3 Function to Compensate Control
Positioning data
Speed
No.1
V1
Distance ∆d
V2
Speed Positioning data
No.1
V1
V2
Positioning data
Speed
No.1
V1
V2'
V2
Positioning data
No.2
T
1
Less than 0.88ms
Positioning data
No.2
Distance ∆d
0.88ms or more
Positioning data
No.2
Distance ∆d
V2': The speed of when the
workpiece moves the
distance ∆d in 0.88ms.
T
22
0.88ms
Time
T Time
21
Time