Mitsubishi Electric MELDAS C6 Programming Manual page 50

6. Interpolation Functions
Detailed description
Z axis
Y axis
X axis
(1) For this command, command a linear axis (multiple axes can be commanded) that does not
contain a circular axis in the circular interpolation command.
(2) For feedrate F, command the X, Y Z axis composite element directions speed.
(3) Pitch l is obtained with the following expression.
=
l
(2 π • P1 + θ ) / 2 π
θ = θ E − θ s = tan
Where xs, ys are the start point coordinates from the arc center
xe, ye are the end point coordinates from the arc center
(4) If pitch No. is 0, address P can be omitted.
(Note) The pitch No. P command range is 0 to 99.
The pitch No. designation (P command) cannot be made with the R-specified arc.
(5) Plane selection
The helical interpolation arc plane selection is determined with the plane selection mode and
axis address as for the circular interpolation. For the helical interpolation command, the plane
where circular interpolation is executed is commanded with the plane selection G code (G17,
G18, G19), and the 2 circular interpolation axes and linear interpolation axis (axis that
intersects with circular plane) 3 axis addresses are commanded.
XY plane circular, Z axis linear
ZX plane circular, Y axis linear
YZ plane circular, X axis linear
The plane for an additional axis can be selected as with circular interpolation.
UY plane circular, Z axis linear
In addition to the basic command methods above, the command methods following the
program example can be used. Refer to the section "6.4 plane selection" for the arc planes
selected with these command methods.
P time
1
Second time
First time
l
Z1
ye ys
–1 –1
– tan
xe xs
Command the X, Y and Z axis addresses in the G02 (G03) and G17 (plane
selection G code) mode.
Command the X, Y and Z axis addresses in the G02 (G03) and G18 (plane
selection G code) mode.
Command the X, Y and Z axis addresses in the G02 (G03) and G19 (plane
selection G code) mode.
Command the U, Y and Z axis addresses in the G02 (G03) and G19 (plane
selection G code) mode.
6.6 Helical interpolation
Z
1
(0 ≤ θ < 2 π )
42
Y
θ
θ
e
End point
θ
X
s
Start point