Siemens SINUMERIK 840D sl Function Manual page 1746

Detailed description
2.2 Feedrate FA for positioning axes
2.1.6 Feedrate for G63, tapping with compensation chuck
Application
G63 is a subfunction for tapping threads using a tap with compensating chuck. An encoder
(position encoder) is not required.
Speed S, feedrate F, thread lead
With G63, a speed S must be programmed for the spindle and a feedrate F for the infeed
axis (axis for thread length).
The feedrate F must be calculated by the programmer on the basis of the speed S and the
thread lead.
Feedrate F [mm/min] = speed S [rev/min] * thread lead [mm/rev]
2.2 Feedrate FA for positioning axes
Syntax
FA[<positioning axis>] = <feedrate value>
Functionality
The velocity of a positioning axis is programmed with axisspecific feedrate FA.
• Effectiveness: Modal
• Special points to be noted
Parameter: Positioning axis
• Value range: Identifier of channel axes
Parameter: Feed value
• Value range
30
– No more than 5 axis-specific feedreates can be programmed in each part program
block.
– The feedrate is always G94.
– If no axial feedrate FA is programmed, the axial default:
MD32060 $MA_POS_AX_VELO (initial setting for positioning axis velocity) takes
effect.
MD20080 $MC_AXCONF_CHANAX_NAME_TAB
0.001...999,999.999 mm/min, degrees/min or 0.001, ...39 999,9999 inch/min
For more information about the value range of the axial feedrate see:
References:
/PG/ Fundamentals Programming Guide
/FB1/ Function Manual Basic Functions; Velocities, Setpoint/ Actual Value Systems,
Closed-Loop Control (G2)
Basic logic functions: Feeds (V1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0