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CNC 8070
6
·97·
(R
EF
: 1709)
TECHNOLOGICAL FUNCTIONS
6.1
Machining feedrate (F)
The machining feedrate may be selected by programmed using the "F" code which remains
active until another value is programmed. The programming units depend on the active work
mode (G93, G94 or G95) and the type of axis being moved (linear or rotary).
G94
- Feedrate in millimeters/minute (inches/minute).
G95
- Feedrate in millimeters/revolution (inches/revolution).
G93
- Machining time in seconds.
The programmed "F" is effective in linear (G01) or circular (G02, G03) interpolations.
Movements in G00 (rapid traverse) are executed in rapid regardless of the programmed "F"
value.
Movement without programmed feedrate.
In principle, the CNC will show the corresponding error when programming a movement in
G01/G02/G03 without having set a feedrate.
Optionally, the manufacturer may have configured the CNC to make the movements at the
maximum machining feedrate, set by machine parameter MAXFEED.
Feedrate limitation.
The manufacturer may have limited the maximum feedrate with machine parameter
MAXFEED. When trying to exceed the maximum feedrate via part-program, via PLC or from
the operator panel, the CNC limits the feedrate to the maximum value set without showing
any error message or warning.
If this parameter is set to zero, the machining feedrate is not limited and the CNC assumes
the one set for G00 as the maximum feedrate.
Variable to limit the feedrate via PLC.
(V.)[n].PLC.G00FEED
is a variable that may be written from the PLC to set, at a particular
moment and in real time, the maximum feedrate of the channel for any type of movement.
Feedrate regulation.
The programmed feedrate "F" may be varied between 0% and 200% using the selector
switch on the CNC's operator panel or it may be selected by program or by PLC. However,
the maximum override is limited by the machine manufacturer [G.M.P. "MAXOVR"].
When making movements in G00 (rapid traverse), the feedrate override percentage will be
fixed at 100% or it may be varied between 0% and 100% depending on how the machine
manufacturer has set [G.M.P. "RAPIDOVR"].
When carrying out threading operations, the feedrate percentage will be fixed at 100% of
the programmed feedrate.
Summary of Contents for 8070 BL
Page 1: ... Ref 1709 8070 CNC Programming manual ...
Page 8: ...BLANK PAGE 8 ...
Page 12: ...BLANK PAGE 12 ...
Page 14: ...BLANK PAGE 14 ...
Page 26: ...BLANK PAGE 26 ...
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Page 60: ...Programming manual CNC 8070 2 MACHINE OVERVIEW Home search 60 REF 1709 ...
Page 72: ...Programming manual CNC 8070 3 COORDINATE SYSTEM Coordinate programming 72 REF 1709 ...
Page 96: ...Programming manual CNC 8070 5 ORIGIN SELECTION Polar origin preset G30 96 REF 1709 ...
Page 178: ...Programming manual CNC 8070 9 TOOL PATH CONTROL MANUAL INTERVENTION Variables 178 REF 1709 ...
Page 304: ...Programming manual CNC 8070 16 C AXIS Machining of the turning side of the part 304 REF 1709 ...
Page 442: ...Programming manual CNC 8070 23 CNC VARIABLES 442 REF 1709 ...
Page 443: ...Programming manual CNC 8070 443 User notes REF 1709 ...