Storing The Thread Recutting Position - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.3 Thread Recutting

14.3.2.3 Storing the Thread Recutting Position

The "Operation to Store the Thread Cutting Position" is equivalent to steps 2 through 5 of the "Method of Operation". The
thread recutting position record stores the machine position of the lead axis when the tool is aligned with the thread groove
and stores the spindle angle. When this information is successfully stored, the thread recutting spindle number is represented
by R650 and the thread recutting lead axis number is represented by R651.
[Timing chart when executing the storage process]
Command execution
(R2626 /bit7)
Memory
(R2626 /bit0)
Memory/Delete
execution finished
(R648 /bit0)
Error completed
(R648 /bit7)
All errors
(R648 BIT8 to C)
[Conditions for storing thread recutting positions]
The amount of phase shift during the thread recutting operation is calculated by the first thread cutting block used for the
thread recutting process. Thus, if there are multiple screw cutting commands in the processing program, store the thread
recutting position at the position of the workpiece corresponding to the first thread cutting block used for the thread recutting
process.
Store the thread recutting position after satisfying the following conditions. When attempting to store the thread recutting
position if these conditions are not satisfied, the thread recutting position is not stored, and bit7 in R648 (thread recutting
status) and the bit corresponding to the error are turned ON. Confirm and resolve the cause of failure to store the position and
then reperform the operation to store the thread recutting position.
Thread recutting position storage conditions
 The zero point of the lead axis is established.
 The spindle passes the Z phase after power is turned ON.
 Thread recutting process must be in operation (thread recutting status is not "thread recutting in operation").
 Cycle start is not in operation.
 Spindle is stopped (zero speed).
 All axes in the part system to be stored must be stopped.
 The lead axis number set in R2626 (thread recutting command) must be within the allowed range.
 The spindle number set in R2567 (encoder selection) must be within the allowed range.
 Multiple-spindle control II must be selected.
IB-1501668-B
Normally finished
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582
Error finished
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