Siemens sinumerik 840D sl Function Manual page 385

Workpiece/tool parameter
The values z
operator or the parts program.
Differential constants
Differential constants u
cutter geometry. These differential constants can be determined in user-specific cycles.
u
dz
[degrees / mm]
u
dy
[degrees / mm]
with:
m
n
β° = Incline angle of gear
γ° = Pitch angle of hobbing machine
Extract from parts program:
; Definition of EG axis group with
; setpoint coupling (1) from B, Z, Y to C (following axis)
EGDEF(C, B, 1, Z, 1, Y, 1)
; Activate coupling
EGON(C, "FINE", B, z
4.3.2 Extended example with non-linear components
Introduction
The following example extends the example in Figure "Axis Definition of a Hobbing Machine"
in Chapter "Example of Linear Couplings" with the following:
• Machine error compensations which are not linearly dependent on the Z axis, and
• a Z-axis dependent component with tooth geometry.
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
, z , u and u
0 2 dz
and u
dz
= (sin / m * π) * 360
β° n
= (cos / m * π ) * 360
γ° n
= normal module (in mm)
This can be used to create a slightly convex tooth surface, so that the centre of the tooth
is stressed more than the edges during operation.
are workpiece or tool dependent and are specified by the NC
dy
make allowance for the angle of workpiece teeth and for
dy
0 , z 2 , Z, u dz , z 2 , Y, u
4.3 Electronic gear for gear hobbing
dy , z 2 )
Examples
165