Approaching A Fixed Point In Jog; Function - Siemens SINUMERIK 840D sl Function Manual

Extended functions

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MD21158 $MC_JOG_JERK_ORI [<orientation axis>]

For MD21158 to take effect, the channel-specific jerk limitation for the manual traversing of

orientation axes must be enabled via the following machine data:

MD21159 $MC_JOG_JERK_ORI_ENABLE == TRUE

If the axis is not defined as a geometry axis, alarm 20060, "Axis cannot be traversed as a

geometry axis", is output if you attempt to manually traverse it as a geometry axis in JOG mode.

Alarm 20062, "Axis already active", is triggered in the case that a geometry axis/orientation

axis is manually traversed under the following conditions:

● The axis is already being traversed in JOG mode via the axial PLC interface.

● A frame for a rotated coordinate system is already active and another geometry axis in this

coordinate system is traversed in JOG mode with the traversing keys.

Approaching a fixed point in JOG

The machine user can use the "Approaching fixed point in JOG" function to approach axis

positions defined through machine data by actuating the traverse keys of the machine control

table. The traveling axis comes to a standstill automatically on reaching the defined fixed point.

Approaching a fixed point with G75

The process for approaching defined fixed points can also be activated from the part program

using the G75 command.

For more information on fixed point approach with G75 please refer to:

Programming Manual, Fundamentals; Section: "Additional commands" > "Approach fixed point

Applications

Typical applications are, for example:

● Approaching a basic position before starting an NC program.

● Travel towards tool change points, loading points and pallet change points.

Extended Functions

Function Manual, 10/2015, 6FC5397-1BP40-5BA3

H1: Manual and handwheel travel

4.9 Approaching a fixed point in JOG

Sinumerik 828d