SZGH SZGH-CNC1000MDb Series, Руководство пользователя

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-Shenzhen Guanhong Automation Co.,Ltd.- SZGH-CNC1000MDb Series
- 28 -
and is expressed as an absolute or incremental value according to G90 or G91. For the incremental
value, the distance of the end point which is viewed from the start point of the arc is specified.
Distance from the start point to the center of arc: The arc center is specified by addresses I,
J and K for the Xp, Yp and Zp axes, respectively. The numerical value following I, J or K, however,
is a vector component in which the arc center is seen from the start point, and is always specified
as an incremental value irrespective of G90 and G91, as shown below.
I, and K must be signed according to the direction.
Fig3.5.2 Define & Direction of I, J & K
I0, J0 and K0 can be omitted.
If the distance is from the end point to the center of arc , which exceeds by the value in a
parameter of P41 in Speed parameter(Original value+4).
Full–circle programming:
When Xp , Yp and Zp are omitted (the end point is the same as
the start point) and the center is specified with I, J and K, a 360° arc (circle) is specified.
Arc radius:
The distance between an arc and the center of a circle that contains the arc can be
specified using the radius, R, of the circle instead of I, J and K. In this case, one arc is less than 180°,
and the other is more than 180° are considered. When an arc exceeds 180° is commanded, the
radius must be specified with a negative value. If Xp, Yp and Zp are all omitted, if the end point is
located at the same position as the start point and when R is used, an arc of 0° is programmed.
G02R ; (The cutter does not move.)
Feedrate
: The feedrate in circular interpolation is equal to the feed rate specified by the F code,
For arc (1) [Less than 180º]
G91 G02 X
p
60.0 Y
p
20.0 R50.0 F300.0;
For arc (2) [Greater than 180º]
G91 G02 X
p
60.0 Y
p
20.0 R-50.0 F300.0;