8-35
8
Cycles
TNC 426/TNC 425/TNC 415 B/TNC 407
SIDE FINISHING (G124)
Sequence
The subcontours are approached and departed on a tangential arc. Each
subcontour is finish-milled separately.
Input data
• DIRECTION OF ROTATION Q9
Direction of the cutter path
Clockwise: +1
Counterclockwise: –1
• PECKING DEPTH Q10
Dimension by which the tool plunges in each infeed
• FEED RATE FOR PECKING Q11
Traversing speed during penetration
• FEED RATE FOR MILLING Q12
Traversing speed for milling
• ALLOWANCE FOR SIDE Q14
Enter the allowed material for several finish-milling operations.
If Q14 = 0 is entered, the remaining finishing allowance will be cleared.
Prerequisites
• The sum of ALLOWANCE FOR SIDE (Q14) and the radius of the finish
mill must be smaller than sum of ALLOWANCE FOR SIDE (Q3, Cycle
G120) and the radius of the roughing mill. This calculation also holds if
G124 is run without having roughed out with G122, in which case 0
should be used for the radius of the roughing mill.
Example: Rectangular pocket with round island
Input parameters:
Milling depth Q1:
–15 mm
Path overlap Q2:
1
Allowance side Q3:
1 mm
Allowance depth Q4:
1 mm
Top surface of workpiece Q5:
0
Setup clearance Q6:
2 mm
Clearance height Q7:
50
Rounding radius Q8:
10 mm
Direction of rotation Q9:
+1
Subcontours are defined in subprograms
1 and 2.
80
100
80
100
Y
X
Z
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