M144 Secondary spindle reverse

Haas NGC M-code · Lathe

Starts the secondary spindle in reverse on DS lathes. P sets the RPM.

Format

M144 P

Addresses

Address	What it does
`P`	Secondary spindle speed in RPM

How it works

Modal until M143 or M145.

Example program

M144 P800 (SECONDARY SPINDLE REVERSE 800 RPM)
G01 X-.06 F.004 (FACE)
M145 (SECONDARY STOP)

Example is in inch. Check offsets and clearances first.

Watch out for

M144 alarms while G14 is on.

Related codes

M143 · M145

M144 on other controls

The same number can mean something different on another control.

Control	Meaning
Doosan (Fanuc)	Atc waiting pot retract
DMG Mori MAPPS (Fanuc)	Optical sensor power ON
Heidenhain TNC (ISO)	Kinematics compensation for positions

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