CNC Operation
en-938821/2 5 - 5
5
5.1 Preliminary Operations
When the CNC is switched on, no measurement origin is available for the axes motion calculations.
The system must be initialised (by homing the axes: see 1.2.3 and 5.1.2) before any programmed movement is
performed.
This homing procedure provides the CNC with a coordinate system which it uses for programmed movements.
If this homing procedure has not been carried out, only jog operations can be performed.
5.1.1 Operator-Controlled Jog
Three types of jog operations can be performed:
- incremental jog,
- continuous jog,
- jog using handwheel.
!
CAUTION
When the homing procedure has not been performed, the software end of travel limits on
the axes are inactive and only the mechanical end of travel limits prevent the machine from
exceeding its safe travel.
During jog operations prior to the homing procedure, it is not recommended to allow an axis
to reach its mechanical end of travel switches, since the axis must then be returned within
the authorised range by a special procedure which temporarily overrides the normal action
of the travel switch, (as opposed to the software end of travel limits which automatically
allow the axis to move off in the opposite direction).
5.1.1.1 Selection of JOG Softkeys
Actions
Select the JOG softkeys. ☞
JOG
Display of the JOG softkeys at the bottom of the screen (See 3.1.4.4):
.1 1 10 100 1000 10000 FREEHANDW .01.001
Exit from the procedure
Return to the basic softkeys. ☞
JOG
Return to the basic softkeys (See 3.1.4.2).
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