HEIDENHAIN iTNC 530 (340 49x-05) - Manual (Page 372)

372 Programming: Special Functions
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.3 Fixt
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11.3 Fixture Monitoring (Software
Option)
Fundamentals
Using the fixture management in the Manual operating mode, you can
place simple fixtures in the working space of the machine in order to
implement collision monitoring between the tool and the fixture.
Several work steps are required to place fixtures
„ Model the fixture template
HEIDENHAIN provides fixture templates such as vices or jaw
chucks in a fixture template library (see “Fixture templates” on page
373), that were created with the PC program KinematicsDesign. The
machine tool builder can model additional fixture templates and
provide you with them. The fixture templates have the file name
extension cft
„ Set the fixture parameter values: FixtureWizard
With the FixtureWizard you define the exact dimensions of the
fixture by entering parameters values in the fixture template. The
FixtureWizard is available as a stand-alone PC tool and as a
component of the TNC fixture monitoring feature. It generates a
placable fixture with concrete dimensions defined by you (see
“Setting parameters for the fixture: FixtureWizard” on page 374).
Placable fixture templates have the file name extension cfx
„ Place the fixture on the machine
In an interactive menu the TNC guides you through the actual
measurement process. The measurement process consists
essentially of the performance of various probing functions on the
fixture and entering variable sizes, for example the jaw gap of a vice
(see “Placing the fixture on the machine” on page 376)
„ Check the position of the measured fixture
After you have placed the fixture, you can have the TNC create a
measuring program as needed with which you can have the actual
position of the placed fixture compared with the nominal position. If
the deviations between the nominal and actual positions are too
large, the TNC issues an error message (see “Check the position of
the measured fixture” on page 378)
Your machine tool builder must define permissible location
points in the kinematic description before you can use the
fixture monitoring. The machine tool manual provides
further information.
Your machine has to feature a 3-D touch probe for
workpiece measurement. Otherwise you cannot locate
the fixture on the machine.