BACK MACHINING FAPT
1 C axis/Y axis end face machining
In a section to which part figure is defined on the rear side, C axis end face machining cannot
be performed in primary machining.
Although rear end face machining before sub cycle with work regrasping can be defined in
machining definition, machining cannot be performed in proper position using prepared NC
#1: Defined machining position
#2: Machining position in case #1 machined in primary machining
In a section to which part figure is defined on the front side, C axis end face machining cannot
be performed in back machining.
2 Machining sequence
Define the machining sequence as follows regardless of axis C axis machining, Y axis
machining or turning:
(1) Primary machining, (2) Sub cycle (work regrasping), (3) Back machining
3 Spindle number
The question of spindle number on the tool data screen, SN = _ is used to decide an M code
for indicating spindle rotation direction. Although, SN = 2 in any process before auxiliary
machining with work regrasping or SN = 1 after this process can be defined, machine operation
is not guaranteed.
4 Workpiece coordinate system setting G code
Before attempting to run an NC program created using this function, ensure that the workpiece
origin offset for the workpiece coordinate system to be used has been set in the NC parameter
correctly. Failure to set the correct offset may cause damage to the blank or tool.