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The high-accuracy control is commanded with ;
There are two types of command formats which can be changed with the parameters.
G61.1 Ff1 ;
G61.1
: High-accuracy control mode ON
Ff1
: Feedrate command
High-accuracy control mode is validated from the block containing the G61.1 command.
"G61.1" high-accuracy control mode is canceled with one of the G code group 13's functions.
G08 P1(P0) ;
G08
: High-accuracy control mode
P1
: High-accuracy control mode start
P0
: High-accuracy control mode end
"G08 P1" high-accuracy control mode is canceled with P0 in G08.
Command G08P_ in an independent block.
The decimal places below the decimal point are ignored for P address.
(Note)
G code group in G08 is "0"; the priority is given to the function of the G code group 0 over that of the
G code group 13. After "G08 P1" is commanded, G code group 13 is changed automatically to G64
(cutting) mode. Other command of "13" results in error. Even if high-accuracy control mode is
canceled by "G08 P0" command, G64 (cutting) mode will not be changed. If you want to return to
the function of the G code group "13" when "G08 P1" has been commanded, command again after
high-accuracy control mode is canceled.
(1) Acceleration/deceleration before interpolation
By accelerating/decelerating before interpolation, the machining shape error generated by
smoothing can be eliminated, and a highly accurate path can be achieved.
With the arc commands, the radius reduction error can be significantly minimized.
Furthermore, since constant inclination acceleration/deceleration is performed, the time taken for
positioning at microscopically small distances in the G00 command is reduced.
(Note 1) Whether acceleration/deceleration before interpolation in the rapid traverse command
(G00) is to be performed always or not can be selected using a parameter setting
independently from the high-accuracy control assignment.
(2) Optimum corner deceleration
By calculating the angle of the seam between blocks, and carrying out acceleration/deceleration
control in which the corner is passed at the optimum speed, highly accurate edge machining can be
realized.
When the corner is entered, that corners optimum speed (optimum corner speed) is calculated from
the angle with the next block. The machine decelerates to that speed in advance, and then
accelerates back to the command speed after the corner is passed.
(a) Speed before entering the corner
(b) Speed change at the corner
(c) Speed after the corner is passed
M700V Series Specifications Manual
12 Program Support Functions
V
(a)
θ
ΔV (b)
V
(c)
III - 279
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