G61, G61.1, G64: Select Path Mode

Last modified by writer on 2023/02/09 18:22

G61 – exact path mode. Accurate following of the trajectory at the highest possible speed.
G61.1 – exact stop mode. Movement will stop at the end of each programed segment.
G64 P- – smoothing mode. Rounding corners with a given error.

G64 P- example:
G64 P0.1 (the trajectory of movement should not deviate by more than 0.1 from the given trajectory)

All these modes are designed to find their own compromise between accuracy and speed of NC execution. The most accurate, but also the slowest – G61.1, then G61 and the last in the list G64.

G64 is specified with a parameter that reflects the maximum allowable deviation from the given path (permissible error). The higher the error, the stronger the machine smoothes the trajectory of movement, and the faster the NC will be performed.

Attention!

It is necessary to take into account the capabilities of the machine, the specifics of the material being processed and, of course, understand what the final result should be when choosing an allowable error (parameter G64).

For example, for a plasma cutting machine, where the error and fluctuations in the flame width reach several tens, there is no sense in a sufficiently small value of the parameter (for example, 0.01 mm). Or, if the machine itself has a backlash of 0.1 mm or experiences strong vibrations during execution, then the accuracy of performing a NC of 0.01 mm will again not bring the desired result, which means that the operation of G64 will be equivalent to G61 taking into account all conditions.

Additional information:
Supported Trajectory Modes