Fagor CNC 8070, Programming Manual

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Programming manual
CNC 8070
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5.3.1 Spindle speed programming
The functions related to spindle speed programming may be used to
select either Constant Surface Speed mode or Constant turning
speed mode. Constant Surface Speed is only available at the master
spindle of the channel.
At constant surface speed, the CNC changes the spindle speed as the
perpendicular axis moves in order to maintain the cutting speed
constant between the tool and the part, thus optimizing the machining
conditions.
Programming
The functions related to spindle speed programming are:
G96 Constant surface speed.
G97 Constant turning speed.
These functions may be programmed anywhere in the program and
they don't have to go alone in the block.
G96 Constant surface speed
The G96 function only affects the master spindle of the channel.
After executing G96, the CNC interprets that the spindle speeds
programmed for the master spindle of the channel are in meters/
minute (feet/minute). This work mode is activated when programming
a new speed while G96 is active.
It is recommended to program the speed in the same block as the G96
function. The spindle gear (range) (M41, M42, M43, M44) must be
selected in the same block or in a previous one.
G97 Constant turning speed
The G97 function affects all the spindles of the channel.
After executing G97, the CNC interprets that the spindle speeds
programmed are in rpm and starts working at constant turning speed.
It is recommended to program the speed in the same block as the G97
function; if not programmed, the CNC assumes as programmed
speed the one the spindle is currently turning at. The spindle gear
(range) (M41, M42, M43, M44) may be selected at any time.
The following functions are oriented to lathe type machines. In order
for Constant Surface Speed mode to be available, the machine
manufacturer must have set one of the axis -face axis- (usually axis
perpendicular to the shaft of the part).
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