
13.AXIS CONTROL OPERATION B-63324EN-1/03
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13.1 AXIS CONTROL BY THE PMC
Any axes can be isolated from control of the CNC and controlled
directly by the PMC. The PMC can issue commands specifying a
traveled distance, feedrate, and so forth to move the tool along these
axes independently of the other axes operating under the CNC.
Therefore, peripheral equipment such as a turret, pallet, or index table
can be controlled by using an axis of the CNC.
Whether to place each axis under control of the CNC or PMC can be
selected with a relevant input signal.
The following operations can be controlled by the PMC directly:
(1) Rapid traverse with a traveled distance specified
(2) Cutting feed with amount of travel specified .... feed per minute
(3) Cutting feed with amount of travel specified .... sec/block
specification
(4) Dwell
(5) Reference position return
(6) Feedrate command
(7) Auxiliary function
(8) Machine coordinate system selection
(9) Torque control command
With cutting feed with an amount of travel specified, mentioned in (2)
and (3), the following are possible:
- Specification of the feedrate and override
- Simultaneous start of cutting feed with another PMC-controlled
axis
Refer to the manual issued by the machine tool builder for details.
CNC
BMI
First axis,
PMC axis
control data
Second axis,
PMC axis
control data
Third axis,
PMC axis
control data
PMC
Command
First axis
management
Pulse
distribution
Servo
control
Motor
Second axis
management
Pulse
distribution
Servo
control
Motor
Third axis
management
Pulse
distribution
Servo
control
Motor