·104·
Programming manual
CNC 8055
CNC 8055i
6.
PATH CONTROL
·M· & ·EN· MODELS
SOFT: V02.2X
Feedrate "F" as an inverted function of time (G32)
6.15 Feedrate "F" as an inverted function of time (G32)
There are instances when it is easier to define the time required by the various axes of the machine
to reach the target point instead of defining a common feedrate for all of them.
A typical case may be when a linear axis (X, Y, Z) has to move together (interpolated) with a rotary
axis programmed in degrees.
Function G32 indicates that the "F" functions programmed next set the time it takes to reach the
target point.
In order for a greater value of "F" to indicate a greater feedrate, the value assigned to "F" is defined
as "Inverted function of time" and it is assumed as the activation of this feature.
"F" units: 1/min
Example: G32 X22 F4
indicates that the movement must be executed in 1/4 minute; i.e. in 0.25 minutes.
Function G32 is modal and incompatible with G94 and G95.
On power-up, after executing M02, M30 or after an Emergency or Reset, the CNC assumes G94
or G95 depending on the setting of general machine parameter "IFFED".
Considerations:
The CNC variable PROGFIN will show the feedrate programmed as an inverted function of time and
variable FEED will show the resulting feedrate in mm/min or inches/min.
If the resulting feedrate of any axis exceeds the maximum value set by machine parameter
"MAXFEED", the CNC will apply this maximum value.
The programmed "F" is ignored on G00 movements. All the movements will be carried out at the
feedrate set by axis machine parameter "G00FEED".
When programming "F0" the movement will be carried out at the feedrate set by axis machine
parameter "MAXFEED".
Function G32 may be programmed and executed in the PLC channel.
Function G32 is canceled in JOG mode.
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