Fixed cycle A (Longitudinal turning cycle)

Q: What does Mazak G-code G290 do?

G290 — Fixed cycle A (Longitudinal turning cycle) on the MAZATROL SmoothX control (INTEGREX e-670H). Continuous straight turning operations can be initiated by the following instruction: Continuous taper turning operations can be initiated by the following instruction: 1. In the single-block operation mode, the tool stops either at the ending points of operations 1, 2, 3 and 4, or only on completion of one cycle (depending on bit 7 of parameter F111). 2. Depending on the signs of X, Z and R, the following shapes are created. * The explanation below refers to incremental data input (under G91). An alarm (899 ILLEGAL TAPER LENGTH) occurs for shapes [2] and [3] unless the Straight or cylindrical threading operations can be initiated by the following instruction:

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

Continuous straight turning operations can be initiated by the following instruction: Continuous taper turning operations can be initiated by the following instruction: 1. In the single-block operation mode, the tool stops either at the ending points of operations 1, 2, 3 and 4, or only on completion of one cycle (depending on bit 7 of parameter F111). 2. Depending on the signs of X, Z and R, the following shapes are created. * The explanation below refers to incremental data input (under G91). An alarm (899 ILLEGAL TAPER LENGTH) occurs for shapes [2] and [3] unless the Straight or cylindrical threading operations can be initiated by the following instruction:

G290 is modal (group 09) — it stays in effect until another code of the same group replaces it.

Programming format

G290 X_ Z_ F_
G290 X_ Z_ R_ F_

Address words

R : Taper depth (incremental in radius value, with sign)

Source

Mazak PROGRAMMING MANUAL for EIA/ISO PROGRAM, manual H747PB0030E, section 13-5-1 Longitudinal turning cycle: G290, p. 3-11, 13-45, 13-46. Reference and explanation only — not a reproduction of the manual.

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