M98 Subprogram call

Mach3 Mach4 M-code · Mill

Jumps to the block with the given O number, runs it and comes back at M99. Mach4 also looks in the Subroutines folder. Mach3 can also call a file by name.

Format

M98 P [Q] [L] or M98 (FILE NAME) [L]

Addresses

Address	What it does
`P`	O number of the subprogram
`L`	Repeat count, default 1
`Q`	Mach4 start sequence number in the sub, Mach3 another repeat word
`(FILE NAME)`	Mach3 only, a separate file in parentheses

How it works

Non modal.

Example program

(MAIN PROGRAM)
G0 G20 G90 G54 G17 G40 G49 G80 (SAFE START, INCH)
T1 M6 (TOOL CHANGE)
S6000 M3 (SPINDLE ON)
…

The full 10-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

Write the letter O, not zero, on the sub label. Mach4 sub files in the Subroutines folder are named like O1000 with no extension.
Put subs after M30 so they are not run by the main flow.
Q means start line on Mach4 but repeat count on Mach3.

Related codes

M99 · G65 · G52

M98 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	Subprogram call
Haas NGC	Subprogram call
Doosan (Fanuc)	Sub program call
DMG Mori MAPPS (Fanuc)	Sub-program call in NC memory
Mazak (EIA)	EIA → EIA Subprogram call
Okuma OSP	Subprogram call (Lathes & Mills)
Mitsubishi M70 M80	Subprogram call
Brother Speedio	Subprogram call
Heidenhain TNC (ISO)	Machine open contours completely
LinuxCNC Tormach	Fanuc style subprogram call
Centroid CNC12 Acorn	Call subprogram
Hurco WinMax (NC)	Subprogram call
Fadal	Execute subprogram
Swiss (Citizen Star)	Subprogram call

Every M-code for Mach3 Mach4 in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.

Open M98 in the app All Mach3 Mach4 M-codes

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