Mitsubishi Electric MELDAS 600M Series Instruction Manual page 378

6.19 Deceleration check
(1) Function
With the deceleration check function, a deceleration stop is executed at the block joints before the
next block is executed, preventing corner roundness by reducing the machine shock that occurs
when the control axis feedrate is suddenly changed.
The conditions for executing the deceleration check are as follows.
(a) Deceleration check during rapid traverse
(b) Deceleration check during cutting feed
(c) Deceleration check and parameters
(2) Deceleration check method
Execution of the next block starts after confirming that the positional error amount, including the
servo system, is less than the value set in the parameters (130023 G0inps or 130024 G1inps).
Separate in-position widths can be set for the rapid traverse and cutting feed. In blocks where
there is little danger of interference with the workpiece, a reduction in acceleration time can be
achieved by setting a large in-position value.
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CHAPTER 2 MACHINE OPERATIONS
6. Operation Switch Functions and Other Functions
During the rapid traverse mode, a deceleration check is always carried out when the block
movement finishes before executing the next block.
A deceleration check is carried out at the block joints before executing the next block when
any one of the following conditions is valid during the cutting feed mode.
1) When the error detect switch (external signal) is ON.
2) When G09 (exact stop check) is commanded in the same block.
The G09 command is issued in the same block as the cutting command. It is an unmodal
command.
3) When G61 (exact stop check mode) has been selected.
The G61 command is a modal command. The modal is canceled by the following
commands.
G61.1 .................. High-precision control
G61.2 .................. High-precision control for die machining (CAM data)
G61.3 .................. High-precision control for die machining (height sensing data)
G61.5 .................. High-precision control for part machining
G62 ..................... Automatic corner override
G64 ..................... Cutting mode
In a deceleration check, the in-position width is set in the parameters (servo parameter 160024
SV0024), and the check is carried out with that parameter value as a reference.
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In-position check width
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