
B–63523EN–1/03
3. MANUAL OPERATION
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Generally, tools are fed at a program–specified feedrate or at a feedrate
that matches a dry run feedrate in cutting feed blocks (such as linear
interpolation (G01) and circular interpolation (G02 and G03)) during
automatic operation. However, this function enables the tool to be fed in
synchronization with the rotation of a manual handle (manual pulse
generator).
The manual handle feed axis select signals determine what manual handle
the tool is to be synchronized with.
The feedrate for handle–synchronous feed is controlled in such a way that
its tangential component is proportional to the rotation speed of the
manual handle.
The travel distance of the tool per manual handle pulse (tangential
component of the travel distance) is determined by the manual handle feed
travel distance select signal.
How each signal is combined determines which feedrate
(program–specified feedrate (F command), a dry run feedrate, or a
feedrate synchronized with the rotation of the manual handle) is to be used
in a cutting feed block, as listed below. These signals can be switched in
the middle of a block.
Dry run signal
DRN
Handle–synchronou
s feed signal HDLF
Cutting feedrate
0 0 Program–specified feedrate
0 1 Feedrate synchronized with the
rotation of the manual handle
1 0 Dry run feedrate
1 1 (Do not use)
NOTE
1 The direction of manual handle rotation does not influence
the direction of tool movement. To put another way, rotating
the manual handle backward does not cause the tool to
reverse.
(Handle–synchronous feed ignores the sign of pulses from
the manual pulse generator; the absolute values of pulses
are used.
Therefore, the tool moves along a programmed path
through a distance that matches the number of turns the
manual handle is rotated regardless of the direction of
rotation.)
2 Handle–synchronous feed cannot be used during manual
operation. Even during automatic operation,
handle–synchronous feed cannot be used in a rapid
traverse block.
3.10
HANDLE–
SYNCHRONOUS
FEED (Series 20i)
General