Siemens SINUMERIK 840D sl Function Manual page 165

Activation of an exact stop criterion
An exact stop criterion is activated in the part program by programming the following G-
functions:
G function
G601
G602
G603
Evaluation factor for exact stop criteria
A parameter set-dependent evaluation of the exact stop criteria can be specified via the
following axis-specific machine data:
MD36012 $MA_STOP_LIMIT_FACTOR (exact stop coarse/fine and standstill factor)
Applications
• Adaptation of the positioning response to different mass ratios, such as after a gearshift
• Reduction in positioning time, depending on various machining states, such as roughing
Assignable specification of the active exact stop criterion
The active exact stop criterion can be permanently specified for the part program commands
of the first G-group irrespective of the exact stop criterion programmed in the part program.
This specification can be made independently for each of the following part program
commands:
• Rapid traverse: G0
• Machining commands: G1, G2, G3, CIP, ASPLINE, BSPLINE, CSPLINE,
The setting is done in a channel-specific manner via the following machine data:
MD20550 $MC_EXACT_POS_MODE (exact stop conditions for G00 and G01)
Coding
Each exact stop criterion is location-coded:
• Ones position E: Rapid traverse
• Tens position Z: all other part program commands in the first G-group
MD20550 $MC_EXACT_POS_MODE = <
Z or E
0
1
2
3
Example
MD20550 $MC_EXACT_POS_MODE = 02
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Meaning
Exact stop fine
Exact stop coarse
Interpolator end
and finishing
POLY, G33, G34, G35, G331, G332, OEMIPO01, OEMIPO02, CT
Active exact stop criterion
Programmed exact stop criterion
G601 (Exact stop window fine)
G602 (Exact stop window coarse)
G603 (Interpolator end)
ZE
>
Detailed description
2.2 Exact stop
13