Programming manual
CNC 8055
CNC 8055i
ISO CODE PROGRAMMING
5.
·M· & ·EN· MODELS
SOFT: V02.2X
·69·
Feedrate F
5.2 Feedrate F
The machining feedrate can be selected from the program. It remains active until another feedrate
is programmed. It is represented by the letter F and Depending on whether it is working in G94 or
G95, it is programmed in mm/minute (inches/minute) or in mm/revolution (inches/revolution).
Its programming format is 5.5; in other words, 5.4 when programmed in mm and 4.5 when
programmed in inches.
The maximum operating feedrate of the machine, limited on each axis by the axis machine
parameter "MAXFEED", may be programmed via code F0, or by giving F the corresponding value.
The programmed feedrate F is effective working in linear (G01) or circular (G02, G03) interpolation.
If function F is not programmed, the CNC assumes the feedrate to be F0. When working in rapid
travel (G00), the machine will move at the rapid feedrate indicated by the axis machine parameter
"G00FEED", apart from the F programmed.
The programmed feedrate F may be varied between 0% and 255% via the PLC, or by DNC, or
between 0% and 120% via the switch located on the Operator Panel of the CNC.
The CNC, however, is equipped with the general machine parameter "MAXFOVR" to limit maximum
feedrate variation.
If you are working in rapid travel (G00), rapid feedrate will be fixed at 100%, alternatively it can be
varied between 0% and 100%, depending on how the machine parameter "RAPIDOVR" is set.
When functions G33 (electronic threading), G34 (variable-pitch threading) or G84 (tapping canned
cycle) are executed the feedrate cannot be modified; it works at 100% of programmed F.
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