Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 118

■Polar coordinate interpolation mode operation when combined with each function
The polar coordinate interpolation mode operation for each function is shown below.
Function
Program commands in polar
coordinate interpolation
Positioning (G00)
Linear interpolation (G01)
Circular interpolation (G02, G03)
Dwell (G04)
Exact stop check (G09)
Tool radius compensation vector
setting (G38)
Tool radius compensation corner arc
(G39)
5 G-CODE CONTROL PROGRAMS
116
5.6 G-Code
Polar coordinate interpolation mode operation
• Program commands during polar coordinate interpolation control are commanded using the Cartesian coordinate
values of the linear axis and rotating axis (virtual axis) on the polar coordinate interpolation plane. The axis
addresses of the polar coordinate interpolation rotating axis is used for commanding the second axis of the plane
(virtual axis). At this time, the command units are not [degree], but the same as the units of the first axis (linear axis)
([mm]). Program commands can only command the two polar coordinate interpolation plane axes (polar coordinate
interpolation linear axis and polar coordinate interpolation rotating axis), and the height axis only. If any other axes
are commanded, a minor error (error code: 1FC3H (details code: 0323H)) occurs. The axis address for indicating
the height axis is as follows according to the axis name set in G-code control system parameter "polar coordinate
interpolation linear axis". (When "1: X" is set to "Base axis I", "2: Y" is set to "Base axis J", and "3: Z" is set to "Base
axis K")
Setting value of polar coordinate
interpolation linear axis
1: X
2: Y
3: Z
• The rotating direction of the rotating axis during polar coordinate interpolation mode is the shortest way regardless
of the G-code control axis parameter "rotating axis type" setting.
• The virtual axis coordinate value when the polar coordinate interpolation mode start command (G12.1) is
commanded is "0". This means the position where G12.1 was commanded is deemed as "angle=0", and polar
coordinate interpolation starts. The following are the monitor data devices during polar coordinate interpolation start
command (G12.1) and polar coordinate interpolation cancel command (G13.1).
Monitor data device
[Md.3147] Machine position
[Md.3148] Machine target position
[Md.3149] Relative position
[Md.3150] Relative target position
[Md.3152] Program target position "0" at polar coordinate interpolation mode start command (G12.1).
Can be commanded during polar coordinate interpolation mode.
It is still an interpolation operation even when "Non-interpolation" is set in the G-code control system parameter "G00
non-interpolation".
During polar coordinate interpolation, deceleration check when G1G1 movement direction is reversed (G-code
control system parameter "Deceleration check from G1 to G1") is disabled.
Can be commanded during polar coordinate interpolation mode.
During polar coordinate interpolation, deceleration check when G1G1 movement direction is reversed (G-code
control system parameter "Deceleration check from G1 to G1") is disabled.
Can be commanded during polar coordinate interpolation mode. Central point specification and radius specification
can be used.
The address for specifying the central point during central point specified circular interpolation is as follows according
to the axis name set in G-code control system parameter "polar coordinate interpolation linear axis". (When "1: X" is
set to "Base axis I", "2: Y" is set to "Base axis J", and "3: Z" is set to "Base axis K")
Setting value of polar coordinate
interpolation linear axis
1: X
2: Y
3: Z
During polar coordinate interpolation mode, deceleration check when G1G1 movement direction is reversed (G-
code control system parameter "Deceleration check from G1 to G1") is disabled.
Can be commanded during polar coordinate interpolation mode.
Plane
G17(X-Y plane)
G18(Y-Z plane)
G19(Z-X plane)
Description
No change.
No change at polar coordinate interpolation cancel command (G13.1).
Central point specification command
I, J (polar coordinate plane is deemed as the X-Y plane)
J, K (polar coordinate plane is deemed as the Y-Z plane)
K, I (polar coordinate plane is deemed as the Z-X plane)
Height
Z
X
Y