Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 216

Normal line control temporary cancel
During normal line control, the rotating operation for normal line control is not performed at a block, and it's joint to the
previous block, where the movement amount is smaller than the movement amount set in [Motion Control Parameter][G-
code Control Parameter][G-code Control System Parameter]"Normal Line Control""Minimum Rotating Movement
Amount".
■Linear block
When the movement amount of N2 block is smaller than the G-code control system parameter "minimum rotating movement
amount", normal line control axis rotating operation is not performed at the joint between N1 block and N2 block. The
operation continues in the same direction of N1 block.
• N2 block movement amount < Minimum rotating movement amount
N1
■Arc block
When the diameter of N2 block is smaller than the G-code control system parameter "minimum rotating movement amount",
normal line control axis rotating operation is not performed at the joint between N1 block and N2 block. The operation
continues in the same direction of N1 block. Also, during circular interpolation in N2 block, the rotating operation for normal
line control is not synchronized with the circular interpolation operation.
• N2 block diameter < Minimum rotating movement amount
N1
During tool radius compensation, operation fractioning occurs with the intersection point calculation of two
lines and therefore when the length of the line is equivalent to the G-code control system parameter "minimum
rotating movement amount", the axis may or may not rotate.
6 AUXILIARY AND APPLIED FUNCTIONS
214
6.6 Normal Line Control Function
N2
N3
N2
N3
Diameter