·96·
Programming manual
CNC 8055
CNC 8055i
6.
PATH CONTROL
·M· & ·EN· MODELS
SOFT: V02.2X
Tangential entry at the beginning of a machining operation (G37)
6.8 Tangential entry at the beginning of a machining operation (G37)
Via function G37 you can tangentially link two paths without having to calculate the intersection
points.
Function G37 is not modal, so it should always be programmed if you wish to start a machining
operation with tangential entry:
If the starting point is X0 Y30 and you wish to machine an arc (the path of approach being straight)
you should program:
G90 G01 X40
G02 X60 Y10 I20 J0
If, however, in the same example you require the entrance of the tool to the part to be machined
tangential to the path and describing a radius of 5 mm, you should program:
G90 G01 G37 R5 X40
G02 X60 Y10 I20 J0
As can be seen in the figure, the CNC modifies the path so that the tool starts to machine with a
tangential entry to the part.
You have to program Function G37 plus value R in the block which includes the path you want to
modify.
R5.5 should appear in all cases following G37, indicating the radius of the arc which the CNC enters
to obtain tangential entry to the part. This R value must always be positive.
Function G37 should only be programmed in the block which includes a straight-line movement (G00
or G01). If you program in a block which includes circular movement (G02 or G03), the CNC displays
the corresponding error.
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