Gantry axes (G1)
6.4 Start-up of gantry axes
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
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6.4
Start-up of gantry axes
General information
Owing to the forced coupling which is normally present between leading and synchronized
gantry axes, the gantry axis grouping must be commissioned as if it were an axis unit. For
this reason, the axial machine data for the leading and synchronized axes must always be
defined and entered jointly.
If the synchronized axis is being overloaded by the leading axis due to reduced dynamics,
this is acknowledged with alarm 10656.
Special points to be noted with regard to starting up gantry axes are described below.
Axis traversing direction
As part of the start-up procedure, a check must be made to ensure that the direction of
rotation of the motor corresponds to the desired traversing direction of the axis. Correct by
means of axial machine data:
MD32100 AX_MOTION_DIR (traversing direction)
Activation of the axis grouping
MD37100 GANTRY_AXIS_TYPE[a,b] (gantry axis definition)
This machine data is determined for the following gantry axis:
●
Which gantry grouping (1) the axis is to be assigned to
●
Whether it is to act as a leading or synchronized axis
Table 6- 1
Possible values for MD37100
a
b
Gantry axis
Gantry grouping
-
0
None
-
0
1
Leading axis
1
1
1
Synchronized axis
1
For commissioning purposes, the axes in a gantry grouping must be defined as either all
linear axes or all rotary axes:
MD30300 IS_ROT_AX (rotary axis/spindle)
Entering gantry trip limits
For the monitoring of the actual position values of the synchronized axis in relation to the
actual position of the leading axis, the limit values for termination, as well as for the leading
and synchronized axes, should be entered corresponding to the specifications of the
machine manufacturer:
MD37120 GANTRY_POS_TOL_ERROR (gantry trip limit)