Mitsubishi Electric MELDAS 600M Series Instruction Manual page 81

(4) Calculating the machining time for each CNC function (command)
The machining time for each command in the machining program is calculated as follows.
1)
2)
3)
4)
5)
6)
7)
8)
9)
10) The time cannot be calculated for non-movement commands such as macro operation
11) The actual data for the common and local variables is not affected.
12) As the time to execute the S, M, T and B functions varies with the sequence and each function
Downloaded from ManualsNet.com
CHAPTER 1 SCREEN OPERATIONS
2. Monitor (Operation) Screens
For a rapid traverse command such as G00, the
acceleration/deceleration time is also calculated,
assuming that the override is 100%.
For cutting feed commands such as G01, G02
and G03, the acceleration/deceleration time is
not calculated, although the override is assumed
as 100%. Thus, an error corresponding to the
acceleration/deceleration time occurs during
G90, G04 and exact stop check.
For an F1-digit command, the time is calculated
based on the parameter data designated by the
F1-digit.
For a G04 dwell command, the dwell time is
cumulated as is.
When a G10 or G11 program parameter command is issued, the actual parameter data is
rewritten.
Note that designating up to 160 data items does not affect the tool offset data, but that
designating more data rewrites the actual data.
The reference point return command such as G27, G28 and G29 differs according to the
high-speed method or dog-type method used. Note that as the time is obtained from the
coordinate position, an error may occur.
For the skip commands such as G31 and G31.1, the machining time is calculated up to the end
point.
For synchronous feed such as G95, the S command is handled as a direct rotation command to
determine the feedrate and calculate the machining time. Thus, the accurate time cannot be
cumulated.
The G33 (thread cutting) and G37 (automatic tool length measurement command) times
cannot be calculated.
For commands called repeatedly, such as subprogram, user macro and Fixed cycle, the time is
accumulated by the number of times the commands are called.
commands whose required time is not determined. Thus, the error increases when calculating
the time of a machining program containing many of these commands.
code, the time is not calculated.
The M command displays a maximum of 16 sets of codes with up to eight digits each. M02/M30
are the time calculation end codes.
search engine
Accelera-
tion
Acceleration
Calculated time
G01
I – 66
G00 • 100%
Deceleration
Calculated time
G01 • F100%
Deceleration
G04
Calculated time