Chapter4 Preparation function (Tool offset function) TC-32B
2004/01/22 4 - 16 eTCOMNCPR4.doc
4
Offset amount sign
4.1.7 Change of offset direction in offset mode
By commanding G41 or G42, or converting the algebraic sign (+, -) of the offset amount, the
offset direction can be changed even in the offset mode.
The block not to be changed the next of start block.
As same as miller (Single axis commanding) and the case of changing the offset directon when D
adress position changed.
G code
+-
G41 Left side offset Right side offset
G42 Right side offset Left side offset
Conditions of execution
Offset mode command Linear-Linear Linear-Arc Arc-Linear Arc-Arc
G41 G41
G42 G42
Perform
G41 G42
G42 G41
Perform Perform
When the offset direction is changed, the "inside" and "outside" cuttings are not
discriminated. But whether there is a cross point or not discriminates those cuttings.
The offset amount described hereafter has a positive value.
Where the offset equivalent to the tool
dia is vertically applied to the end point
of the previous block