
B–63523EN–1/03
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
910
The method for feedrate determination according to the acceleration
differs depending on the setting of bit 6 (FNW) of parameter No. 19500.
When this parameter is set to ”0”, the maximum feedrate at which the
allowable acceleration set in parameter No. 8470 is not exceeded is used
as the decreased feedrate. In this case, the decreased feedrate also differs
depending on the move direction when the profile the same as shown
below.
F6000
(Example) When an arc 10 mm in radius is specified with minute straight
line blocks
Bit 6 (FNW) of parameter No. 19500 is set to 0.
The allowable acceleration is set to 1000 mm/s2 (for all axes).
Tangential feedrate
The feedrates in these
directions become high.
Time
When this parameter is set to ”1”, the feedrate is determined according to
the condition that the allowable acceleration for each axis is not exceeded.
When the profile is the same, the feedrate is determined according to the
above condition so that the decreased feedrate is constant irrespective of
the move direction.
When this parameter is set to 1, the feedrate decreased by feedrate
determination according to the feedrate difference and acceleration is
reduced by up to about 30% as compared with the feedrate determined
when the parameter is set to 0.
F6000
(Example) When an arc 10 mm in radius is specified with minute straight
line blocks
Bit 6 (FNW) of parameter No. 19500 is set to 1.
The radius is 10 mm. The allowable acceleration is set to 1000
mm/s2 (for all axes).
Tangential feedrate
The tangential
feedrate is constant.
Time
NOTE
With circular interpolation, the tangential feedrate is
constant regardless of whether the parameter is set to 0 or
1.