Mitsubishi Electronics E68 User Manual

I - 62 

 

Error No. 

Details 

Remedy 

ARC CENTER 
•  The arc center is not sought during 

R-specified circular interpolation. 

•  The curvature center of the involute curve 

cannot be obtained. 

•  Check the numerical values of the addresses 

in the program. 

•  Check whether the start point or end point is 

on the inner side of the base circle for 
involute interpolation. When carrying out tool 
radius compensation, check that the start 
point and end point after compensation are 
not on the inner side of the base circle for 
involute interpolation. 

•  Check whether the start point and end point 

are at an even distance from the center of the 
base circle for involute interpolation. 

A helical command has been issued 
though it is not included in the 
specifications. 

•  Check the helical specifications. 
•  An Axis 3 command was issued by the 

circular interpolation command.  If there is no 
helical specification, the linear axis is moved 
to the next block. 

A thread cutting command has been 
issued though it is not included in the 
specifications. 

•  Check the specifications. 

The screw pitch has not been set 
correctly when the thread cutting 
command is issued. 

•  Issue the thread cutting command and then 

set the screw pitch command properly. 

Cylindrical interpolation was commanded 
when the cylindrical interpolation 
specifications were not provided. 

•  Check the specifications. 

Plane selection commands (G17, G18, 
and G19) were issued when a coordinate 
rotation command (G68) was issued. 

•  Before issuing the plane selection 

commands, issue G68 and then G69 
(coordinate rotation cancel). 

•  A plane selection command (G17‚ G18‚ 

G19) has been issued when the tool 
radius compensation command (G41‚ 
G42) or nose R compensation 
command (G41‚ G42‚ G46) is issued. 

•  The plane selection command was 

issued when nose R compensation is 
completed‚ there is no axial movement 
command after the G40 command‚ and 
the compensation has not been 
canceled. 

•  Issue the plane selection command after the 

tool radius compensation command or nose 
R compensation command has been 
canceled (issue axial movement command 
after the G40 cancel command). 

The arc command axis is not on the 
selected plane. 

•  Issue arc command on the correctly selected 

plane.