Hob milling mode ON

Q: What does Mazak G-code G114.3 do?

G114.3 — Hob milling mode ON on the MAZATROL SmoothX control (INTEGREX e-670H). A synchronization control of the milling spindle and the C-axis allows them to be used as the hob spindle and the workpiece spindle, respectively, and thus enables the turning machine to generate spur and helical gears on a level with a hob milling machine. The hob milling function, however, is only available to machines equipped with the control First spindle C-axis Secondary spindle C-axis D ....... Selection of the direction of workpiece spindle’s rotation +1 : Rotation of the workpiece spindle in the reverse direction to the hob spindle. –1 : Rotation of the workpiece spindle in the same direction as the hob spindle. (Compatible with MT Pro) +1 : Rotation of the workpiece spindle in the same direction as the hob spindle. –1 : Rotation of the workpiece spindle in the reverse

Q: What is the programming format of G114.3?

G114.3 D±1E_L_P_Q_R_; Start of hobbing D ....... Selection of the direction of workpiece spindle’s rotation +1 : Rotation of the workpiece spindle in the reverse direction to the hob spindle. –1 : Rotation of the workpiece spindle in the same direction as the hob spindle. (Compatible with MT Pro) +1 : Rotation of the workpiece spindle in the same direction as the hob spindle. –1 : Rotation of the workpiece spindle in the reverse dir

Machine-specific. This G-code reference is specific to the Mazak INTEGREX e-670H / e-670H-S with the MAZATROL SmoothX control (EIA/ISO programming manual H747PB0030E). G-code availability depends on fitted options, and groups and behaviour differ between Mazak models and control generations — verify against the manual for your own machine before programming with any code.

What it does

A synchronization control of the milling spindle and the C-axis allows them to be used as the hob spindle and the workpiece spindle, respectively, and thus enables the turning machine to generate spur and helical gears on a level with a hob milling machine. The hob milling function, however, is only available to machines equipped with the control First spindle C-axis Secondary spindle C-axis D ....... Selection of the direction of workpiece spindle’s rotation +1 : Rotation of the workpiece spindle in the reverse direction to the hob spindle. –1 : Rotation of the workpiece spindle in the same direction as the hob spindle. <When parameter K103 bit 0 = 1> (Compatible with MT Pro) +1 : Rotation of the workpiece spindle in the same direction as the hob spindle. –1 : Rotation of the workpiece spindle in the reverse direction to the hob spindle. Specify the desired helix angle for a helical gear. Omit the argument, or specify 0 (degree) for a spur gear. Specify the normal module, or diametral pitch, for a helical gear. Enter the module for metric specification. […]

G114.3 is modal (group 23) — it stays in effect until another code of the same group replaces it.

Programming format

G114.3 D±1E_L_P_Q_R_; Start of hobbing
D ....... Selection of the direction of workpiece spindle’s rotation
<When parameter K103 bit 0 = 0>
+1 : Rotation of the workpiece spindle in the reverse direction to the hob spindle.
–1 : Rotation of the workpiece spindle in the same direction as the hob spindle.
<When parameter K103 bit 0 = 1> (Compatible with MT Pro)
+1 : Rotation of the workpiece spindle in the same direction as the hob spindle.
–1 : Rotation of the workpiece spindle in the reverse direction to the hob spindle.
E ....... Number of threads of the hob
L ........ Number of teeth on the gear
P ....... Helix angle
Specify the desired helix angle for a helical gear. […]

Address words

D: Diameter
Z: Number of teeth
m: Module
For our example, the outside diameter of preliminary turning is (38 + 2)× 1.5 = 60.0 [mm].
3. B-axis index angle
Hob
Workpiece
Lead angle
B = 90°
D740PB0119
For the initial angular positioning, index or swivel the milling spindle on the B-axis so as to

Source

Mazak PROGRAMMING MANUAL for EIA/ISO PROGRAM, manual H747PB0030E, section 20-2 Selection/Cancellation of Hob Milling Mode: G114.3/G113, p. 3-11, 20-5, 20-6, 20-7, 20-8, 20-9, 20-10, 20-11, 20-12, 20-13, 20-14. Reference and explanation only — not a reproduction of the manual.

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