Controlling The Feedrate; Automatic Corner Override G62 - Siemens Sinumerik 840D sl Programming Manual

3.6

Controlling the feedrate

3.6.1

Automatic corner override G62

An inside corner with active tool radius compensation is often meaningful to reduce the
feedrate.
G62 operates only on internal corners with active tool radius compensation and active
continuous-path mode. Only the corners whose internal angle is smaller than MD42526
$SC_CORNER_SLOWDOWN_CRIT. The internal angle is defined from the bend in the
contour.
The feedrate is lowered by the factor from the setting data 42524
$SC_CORNER_SLOWDOWN_OVR:
traversed feedrate = F * $SC_CORNER_SLOWDOWN_OVR * feedrate override.
The feedrate override comprises of the feedrate override set in the machine control panel
multiplied with the override from synchronized actions.
The feedrate slowdown is started at the distance before the corner registered in the setting
data 42520 $SC_CORNER_SLOWDOWN_START. It ends with the distance after the corner
(see following Figure) registered in the setting data 42522
$SC_CORNER_SLOWDOWN_END. An appropriate path is used for curved contours.
Figure 3-20
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Parameter assignment of feedrate reduction G62 with the example of a 90°corner
Motion commands
3.6 Controlling the feedrate
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