Cutting Feed Speed - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

Cutting feed speed

For the cutting feed speed, set feed speed[mm/min] per minute and an address F.
The cutting feed speed is valid for G01 commands, G02 commands, G03 commands.
The cutting feed speed is clamped by the value set in [Motion Control Parameter][G-code Control Parameter][G-code
Control Axis Parameter]"Speed/Time Constant""Cutting Feed Clamp Speed".
The cutting feed speed during high-accuracy control mode is clamped by the value set in [Motion Control Parameter][G-
code Control Parameter][G-code Control Axis Parameter]"High-accuracy Control""Cutting Feed Clamp Speed for High-
accuracy Control Mode". However, when cutting feed clamp speed for high-accuracy control mode is set to "0", the value set
in [Motion Control Parameter][G-code Control Parameter][G-code Control Axis Parameter]"Speed/Time
Constant""Cutting Feed Clamp Speed" is used for clamping.
During cutting feed, the composite speed of the interpolation axis is stored in "[Md.3018] Speed (D54502+128s,
D54503+128s)".
Acceleration/deceleration processing during exact stop check mode/automatic corner
override/cutting mode
G00, G01, and G03 commands during exact stop mode/automatic corner override/cutting mode use the time constant
acceleration/deceleration method to process acceleration/deceleration.
The acceleration/deceleration time constant is set in [Motion Control Parameter][G-code Control Parameter][G-code
Control Axis Parameter]"Speed/Time Constant""G1 Time Constant (Linear)".
■When interpolation distance is long, and speed reaches the cutting feed speed
L
Speed
F
θ
Ts
T
When interpolation distance is short, and speed does not reach cutting feed speed
■
Speed
F
L
F1
θ
Ts1 Ts1
Ts
T
Acceleration/deceleration processing during high-accuracy control mode
G00, G01, and G03 commands during high-accuracy control mode use the constant inclination acceleration/deceleration
method to process acceleration/deceleration.
Refer to acceleration/deceleration before interpolation for details on cutting feed acceleration/deceleration processing during
high-accuracy control mode.(Page 226 Acceleration/deceleration before interpolation)
6 AUXILIARY AND APPLIED FUNCTIONS
174
6.3 Feed Function
T=L
θ
=tan
F : Cutting speed
Ts : Acceleration/deceleration time constant
T : Interpolation time
L : Interpolation distance
θ
Time
Ts
F1 =L
Ts1=Ts
Ts1=L
T =Ts1+Ts
T =L
θ
F : Cutting speed
F1 : Actual cutting speed
Ts : Acceleration/deceleration time constant
Time
Ts1: Acceleration/deceleration time taken to reach actual cutting speed
T : Interpolation time
L : Interpolation distance
θ
÷
F+Ts
-1
÷
(rapid Ts)
: Acceleration/deceleration angle
÷
Ts
× ÷
F1 F
÷
F
÷
F+Ts
-1 ÷
=tan (F Ts)
: Acceleration/deceleration angle