High-Accuracy Control; G61.1 - Mitsubishi Electric MELDAS C6 Programming Manual

13. Program Support Functions

13.12 High-accuracy control; G61.1

Function and purpose
Until now, trouble such as the following occurred when using control:
(1) Corner rounding occurred at the corners that linear and linear are connected because the
following command movement started before the previous command finished. (Refer to Fig. 1)
(2) When cutting circle commands, an error occurred further inside the commanded path, and the
resulting cutting path was smaller than the commanded path. (Refer to Fig. 2)
This function controls the operation so the lag is eliminated in control systems and servo
systems. With this function, machining accuracy can be improved, especially during
high-speed machining, and machining time can be reduced.
The high-accuracy control function is configured of the following functions.
(1) Pre-interpolation acceleration/deceleration (linear acceleration/deceleration)
(2) Optimum speed control
(3) Vector accuracy interpolation
(4) Active feed forward
(5) Arc entrance/exit speed control
Commanded path
Actual path
Fig. 1 Rounding at linear corners
13.12 High-accuracy control
Fig. 2 Radius reduction error
256
Commanded path
Actual path
in circle commands