
A-78395E
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FANUC Series 16
i
/18
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-TA/TB
Specifications of High-Precision Contour
Control forComplex Lathe
2001.02.14 A.Fukumoto
02 2001.10.04
Description of Cs axis and rotary axis are added.
6.3 Acceleration/deceleration before interpolation in look–ahead blocks
Short blocks
If there is a series of very short blocks, for each of which the rate of acceleration/deceleration
before interpolation is low, the actual feedrate may not reach the programmed feedrate.
6.4 Automatic feedrate control
Maximum feedrate
If the upper limit for automatic feedrate control is set to 0 in parameter No. 8465, no feedrate
exceeding 0 is permitted, such that the issue of an F command causes an alarm of P/S011. To
prevent this, specify a value other than zero in the parameter.
Override
If the override is changed while the automatic feedrate control function is enabled, the
calculated clamp feedrate is overridden.
6.5 Multi path
It is possible to command a HPCC only in the 1
st
path. The alarm of P/S010 is generated
when it was commanded in other path.
6.6 Angular axis control
Rapid feedrate
In Type-B of rapid traverse, the feedrate of the straight axis occasionally exceeds the value of
parameter No.1420 if the movement instruction of the straight axis and slope axis are
commanded in the same block. The maximum value can be calculated by the following
expressions.
Actual feedrate of straigth axis (max. value) = Fx + Fy * tanθ
Fx : Parameter No.1420 of straight axis.
Fy : Parameter No.1420 of slope axis.
θ : Parameter No.8210.
Automatic feedrate control
In the velocity control of HPCC, the speed clamping etc. are done based on the speed
difference and the acceleration in program coordinate system. Therefore, please set the value
by which the value in mechanical system is converted into the value in program coordinate
system when you set the parameter concerning the acceleration and the speed.
6.7 Manual handle interruption
Parameter setting
Please set “1” in parameter No.7100#2(IHD) when you use the manual handle interruption
for the axis of the angular axis control in the HPCC mode.
6.8 Rotary axis
The Rotary Axis Control Function
The optional Rotary Axis Control Function is not available in HPCC mode.
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