(Common to Power Mate i–D and –H)
4. INTERPOLATION FUNCTIONS
Tools can move along a line
F_ :Speed of tool feed (Feedrate)
_ :For an absolute command, the coordinates of an end point ,
and for an incremental commnad, the distance the tool moves.
A tools move along a line to the specified position at the feedrate
specified in F.
The feedrate specified in F is effective until a new value is specified. It
need not be specified for each block.
The feedrate commanded by the F code is measured along the tool path.
If the F code is not commanded, the feedrate is regarded as zero.
The feedrate of each axis direction is as follows.
Feed rate of α axis direction :
Feed rate of ß axis direction :
The feed rate of the rotary axis is commanded in the unit of deg/min (the
unit is decimal point position).
When the straight line axis α(such as X, Y, or Z) and the rotating axis β
(such as A, B, or C) are linearly interpolated, the feed rate is that in which
the tangential feed rate in the α and β cartesian coordinate system is
commanded by F(mm/min).
β–axis feedrate is obtained ; at first, the time required for distribution is
calculated by using the above fromula, then the β –axis feedrate unit is
changed to deg 1min.
A calculation example is as follows.
G91 G01 X20.0C40.0 F300.0 ;
This changes the unit of the C axis from 40.0 deg to 40mm with metric
input. The time required for distribution is calculated as follows:
The feed rate for the C axis is