Owner's manual

Axis Motion
Chapter 14
14-40
The feed to hard stop feature is used to position the axis of a transfer line
station or the transfer bar of the station against a mechanical stop and hold
it against t he stop. This mechanical stop physically halts axis travel. The
system installer determines the position of this hard stop based on
mechanical consideration of the machine and the process currently being
performed by the axis or transfer bar.
Program a feed to hard stop using a G24 code. Format for the G24 code is
as follows:
G24
X__
Y__
Z__
I__
J__
K__
F__;
Where: Programs:
X,Y,or Z Ha rd stop axis. Use the axis word associa ted with the axis to be hard
stopped. Programan endpointforthe axisthatis past,butvery close
to, theactualhardstop location. Theaxiswordcan beprogrammed
aseitheranabsolute orincremental value(G90orG91 mode).
I, J, or K Detection zone. Usetheaxisintegrand associatedwith the axisto be
hardstopped. Programan incrementaldistance fromthe
programmed endpointforthecontrol to startlooking fora hard stop.
The axis detectionzoneis anunsignedvalue.
F Optional intheG24 block. Fdefinesthe active feedrate fortheG24
feed to hardstop. Ifnot programmedthecurrentlyactive feedrate
isused.
Example 14.1
Feed to Hard Stop
G90 G01 F20;
G24 Z.2 K.15;
ZAxis
Lead screw
Spindle
Motor
Programtheaxiswordwith aposition just
pastthe locationoftheaxiswhen itis against
the hardstop.
Hard Stop
Programtheintegrandwordwith an
incremental distancefrom the programmed
axiswordtoa locationthe controlcan expect
to find the hardstop.
X
Z
1.8.6.4.2
.8
.6
.4
.2
EndpointZ
DetectionZone K
14.7
Feed to Hard Stop (G24)