HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 435)

Example program 12.33
12
TNC 640 | User's Manual Cycle Programming | 1/2015
435
Example: Gear hobbing
Cycle 880 GEAR HOBBING is used in the following
program. This programming example illustrates the
machining of a helical gear, with Module=2.1.
Program sequence
Tool call: Gear hob
Start turning mode
Approach safe position
Call the cycle
Reset the coordinate system with Cycle 801 and
M145
0 BEGIN PGM 5 MM
1 BLK FORM CYLINDER Z R42 L150
Definition of workpiece blank: Cylinder
2 FUNCTION MODE MILL Activate milling mode
3 TOOL CALL "GEAR_HOB_D75" Call the tool
4 FUNCTION MODE TURN Activate turning mode
4 CYCL DEF 801 RESET ROTARY COORDINATE SYSTEM Reset the coordinate system
4 M145
Deactivate M144 if still active
4 FUNCTION TURNDATA SPIN VCONST:OFF S50
Constant surface speed OFF
4 M140 MB MAX Retract the tool
4 L A+0 R0 FMAX Set the rotary axis to 0
4 L X+250 Y-250 R0 FMAX Pre-position the tool in the working plane on the side on
which machining will be performed
4 Z+20 R0 FMAX
Pre-position the tool in the spindle axis
4 L M136 Feed rate in mm/rev
5 CYCL DEF 880 GEAR HOBBING Activate interpolation turning
Q215=+0 ;MACHINING OPERATION
Q540=+2.1 ;MODULE
Q541=+0 ;NUMBER OF TEETH
Q542=+69.3 ;OUTSIDE DIAMETER
Q543=+0.1666 ;TROUGH-TIP CLEARANCE
Q544=-5 ;ANGLE OF INCLINATION
Q545=+1.6833 ;TOOL LEAD ANGLE
Q546=+3 ;CHANGE TOOL DIRECTN.
Q550=+0 ;MACHINING SIDE
Q533=+0 ;PREFERRED DIRECTION
Q530=+2 ;INCLINED MACHINING
Q253=+2000 ;F PRE-POSITIONING
Q260=+20 ;CLEARANCE HEIGHT
Q553=+10 ;TOOL LENGTH OFFSET
Q551=+0 ;STARTING POINT IN Z
Q552=-10 ;END POINT IN Z
Q463=+1 ;MAX. CUTTING DEPTH