Programming manual.
CNC 8070
7.
THE SPINDLE. BASIC CONTROL.
The master spindle of the channel
·120·
(REF: 1709)
7.1 The master spindle of the channel
The master spindle is the main spindle of the channel. It is the spindle that receives the
commands when no specific spindle is mentioned. In general, whenever a channel has a
single spindle, it will be its master spindle.
CNC criterion for selecting the master spindle after executing
M02, M30 or after an emergency or a reset or restarting the CNC.
The selection of the master spindle in the channel depends on machine parameter
MASTERSPDL. This parameter indicates whether the channel keeps the current master
spindle or recovers its original master spindle after executing M02, M30 or after an
emergency or reset or restarting the CNC.
When a channel does not keep its master spindle, on CNC power-up and after a reset, the
channel assumes as master spindle the first spindle defined by the machine parameters of
the channel (original master). If this spindle is parked or "handed out" to another channel,
the channel assumes as master spindle the next spindle defined by the machine parameters
and so on. If the channel does not have spindles of the original configuration (the one defined
by the machine parameters) because they are parked or "handed out", it assumes as master
spindle the first one of the current configuration that is not parked.
Exchanging spindles between channels.
When spindles are being exchanged between channels, the behavior of this parameter also
depends on parameter AXISEXCH that sets whether the channel change of a spindle is
temporary or permanent. If the current master spindle of the channel is a spindle "loaned"
by another channel and its permission to change channels is temporary (AXISEXCH =
Temporary), the spindle returns to its original channel.
Which one is the master spindle after executing M30?
When executing an M30, it follows the same criteria, but considering that after executing this
function, the temporary spindle swaps are not undone; they are undone at the beginning of
the next program. This means that the original master might not be available after executing
an M30, but it will be at the beginning of the next program. In this situation, after an M30,
the channel will temporarily assume a master spindle that will change at the beginning of
the next program.
Which one is the master spindle after modifying the
configuration of the channel?.
If no master spindle is indicated, after parking or swapping spindles, it assumes one
according to the following criteria. In general, whenever a channel has a single spindle, it
will be its master spindle.
• If the whole system only has one spindle, it will be the master spindle of the current
channel.
• If a spindle is added to a channel that does not have one, it will be the master spindle.
• If a channel releases its master spindle and it has only one spindle left, this one will be
its new master spindle.
• If a channel having two spindles but no master spindle releases one of them, the
remaining one will be its master spindle.
• At first, in a channel with several spindles, the master spindle will be the one configured
by machine parameters.
MASTERSPDL Meaning.
Temporary. The channel recovers its original master spindle if it is free; otherwise, it selects
as master the firs spindle available in the original configuration.
Maintained. The channel keeps the active master spindle.
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