Siemens Sinumerik 801 Technical Manual page 77

Programming notice
Programming example
SINUMERIK 801
Start-Up
5]
31060 DRIVE_AX_
RATIO_
NUMERA[0， 1 ...
5]
Notice
A maxium of 5 spindle gear stages can be provided. Assigning the same
parameters to the index [0] and [1] makes gear changes (i=1 ... 5) active only
by setting corresponding interface signals via PLC application.
Pay attention to the following instructions when programming machining
programs:
1) When mm/Min is used as the unit of measurement for the feedrate F,
activate G94; Programming example: N10 G94 G01 Z100 F100
2) When mm/Rev is used as the unit of measurement for the feedrate F,
activate G95; mm/Rev. Programming example: N10 G95 G01 Z100 F1
3) For contactor-controlled spindle, when producing a thread with G33,
program spindle speed S within the actual spindle speed range;
4) When programming a thread cutting, program thread run-in and run-out
paths;
5) The result of a thread lead value multiplied by spindle speed shall be
less than the maximum setpoint speed of Z axis.
N10 G91 G94 F100 S350 M4
N20 G01 Z-0.5
N30 G33 Z-100 K2 SF=0
N40 G01 Z-0.5
N50 X50
- Spindle Numerator
； actual spindle speed 350
； thread run-in
； K - thread lead; SF； SF – Infeed angle for
thread cutting
； thread run-out
Setting Up
no.): 0 ... 5
Numerator
[i] load gearbox
(control
parameter set
no.): 0 ... 5
5-15