9. PRESSING FUNCTION
This control sends a signal “Start press and punch” to the machine after
moving a tool to the position commanded in a predetermined block.
When the machine receives this signal, it starts pressing. As a result,
punching is made on a workpiece by the selected tool. After punching,
the press motion stops, and a signal returns to the NC to indicate that
“punch has finished”.
Thus, NC proceeds to the execution of the next block. In this manner,
punching on a workpiece by press motion is executed by data transfer
between the NC and the machine, and it is necessary to know the blocks
to be punched, in advance.
This description is made from the viewpoints of the NC side. Since
details may differ depending upon the machine tool builders, refer to the
machine tool builder’s manual without fail.
This section covers one-cycle punch only. For nibbling
(punching by sequential repeated press motion), refer to
“9.3 NIBBLING FUNCTION”.
Punching is made in a block where the X-axis or Y-axis is positioned at
rapid traverse, in principle.
In other words, punching is not done in a block where the X-axis or Y-axis
is not positioned at rapid traverse. Blocks where punching is done are as
(1)Block where X-axis or Y-axis is positioned in the positioning mode
If the same position as the present tool position is
commanded by address X or Y, positioning is not done, but
punching is executed. (This is regarded as the positioning
command with movement amount 0)
G00G91X0; . . . Punching is made.
This applies to such a case that punching is done at the
same position using a different tool.
Block in which
Punching is Made