Delta Electronics DVP10MC11T — инструкции по управлению движением для программирования [246/375]

4. Motion Control Instructions

4-202 DVP-MC operating manual

If there are multiple rows of codes and E and F in G2 code are omitted, the velocity, acceleration,

deceleration of the cutter are based on E and F in the previous rows of codes before the row where

G2 is. If the previous rows of G codes have not specified E and F, “maximum velocity”, “maximum

acceleration”, “maximum deceleration” in the parameters of X axis will be taken as reference.

 In absolute mode for G90, the terminal point of circular arc is the absolute coordinate value

regarding 0 unit in their own directions as reference. In relative mode for G91, the terminal point of

circular arc is the incremental value of the start point of circular arc.

 No matter whether in the absolute mode or in relative mode, the coordinates of the center of a

circle I_J_(I_K_/J_K_) are always the relative coordinates with the start point as reference

 T is the quantity of one full circle; the path is the length of the arc when T=0; the path is the

corresponding full circles plus the arc length when T is a constant.

 The difference between Format 2 and format 1 is that format 2 determines a segment of the circular

arc via the start point, terminal point and radius. If the input value to the right of R parameter is

positive number (R+), the circular arc is the minor arc less than 180 degrees; if the input value to

the right of R parameter is negative number (R-), the circular arc is the major arc more than 180

degrees.

The following full lines are the motion path when G3 selects R+ and R- and the arrows on the arc

refer to the motion direction.

The coordinate relations on different planes:

a) XY plane circular arc b) XZ plane circular arc C) YZ plane circular arc

X X Y

l J

J K K

R R R

O O O

Y Z Z

Start point

Start point Start point

Terminal point Terminal point Terminal point

Ce nter of

a circle

Ce nter of

a circle

Ce nter of

a circle

Please note the relations between the coordinate planes and I, J, K. Only two of I, J and K exist in

one circular arc instruction. Which two exist depends on the corresponding plane, e.g. on XY plane,

only I and J show.

The coordinate plane can be set by G17, G18 and G19. The circular and helical motion paths for

G3 on different coordinate planes are shown as below.