·300·
Installation manual
CNC 8060
CNC 8065
6.
LOGIC CNC INPUTS AND OUTPUTS.
(REF: 1402)
Consulting signals for axes and spindles.
PARK(axis)
UNPARK(axis)
The CNC sets mark PARK(axis) to (=1) to indicate that an axis or spindle is being parked
and mark UNPARK(axis) to (=1) to indicate that an axis is being unparked. The mark
PARKED(axis) is also used, it may be modified and is described later on. See
"PARKED(axis)" on page 325.
When parking an axis or spindle, the CNC will not control the axis (it ignores the drive signals,
feedback systems, etc.) because, it interprets that the axis is not present in the new machine
configuration. When unparking an axis, the CNC will control the axis again because it
interprets that the axis is present again in the new machine configuration.
The axes may be parked and unparked from the CNC or from the PLC.
Considerations about axis parking.
The CNC will not allow parking an axis in the following cases.
• If the axis belongs to the active kinematics.
• If the axis belongs to an active transformation #AC or #ACS.
• If the axis belongs to an active angular transformation #ANGAX .
• If the axis belongs to a gantry, tandem pair or is a slaved axis.
• If the axis belongs to an active tangential control #TANGCTRL.
Considerations about spindle parking.
The CNC will not allow parking a spindle in the following cases.
• If the spindle is not stopped.
• If the spindle is working as a C axis.
• If G96 or G63 is active and it is the master spindle of the channel.
• If G33 or G95 is active and it is the master spindle of the channel or the spindle is used
to synchronize the feedrate.
• If the spindle belongs to a tandem pair or is a synchronized spindle, be it the master or
the slave.
If after parking the spindles, there is only one spindle left in the channel, it will become the
new master. If a spindle is unparked and it is the only spindle of the channel, it is also assumed
as the new master spindle.
Park/Unpark from the CNC.
This type of maneuver is good for applications that need the axes or spindles to be parked
automatically from a part program (for example from a part-program). The parking/unparking
maneuver via part-program or MDI is controlled using the programming instructions #PARK
and #UNPARK.
The CNC uses the PARK and UNPARK signals to inform the PLC that the parking or
unparking process has been engaged.
To park an axis or a spindle, its enable signals must be (=0). Likewise, after unparking the
axis, the axis enable signals must be set to (=1).
Application example.
There are machines that, depending on the type of machining, may have 2 different axis
configurations. For example, a machine that interchanges a regular spindle with an
orthogonal one may have the following configurations:
• With a normal spindle, X Y Z axes configuration.
• With an orthogonal spindle, X Y Z A B axes configuration.
When working with a regular spindle, the A and B axes are not present and the CNC issues
an error because it takes them into account (drives, feedback systems, etc.). The A and B
axes must be parked to avoid this.
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