Deceleration Check - Mitsubishi Electric MELDAS C6 Instruction Manual

6.16 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
The servo system position error amount is confirmed to be less than the parameter (#2224 SV024
In-position width) setting value before the start execution of the next block.
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.
The in-position width to be designated in the machining program is unmodal, and commanded in
the same block as G09.
The parameter setting value is used when there is no in-position width command in the machining
program.
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6. Operation Panel Switch 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-accuracy control
G62 ..................... Automatic corner override
G63 ..................... Tapping mode
G64 ..................... Cutting mode
In a deceleration check, the in-position width is set in the parameters (servo parameter #2224
SV024), and the check is carried out with that value as a reference.
In addition, using programmable in-position check function allows to designate temporary
in-position width in a machining program.
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6.16 Deceleration Check
Servo
Command
In-position check width
II - 32
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