Anti-Tie-Down Start
The Anti-Tie-Down Start feature is used in conjunction with an anti-tie-down
device and a part fixture. An anti-tie-down device is a safety start device and is
available from several sources. Nolatron, for example makes a simple package
that is compatible with Sprint LC. It requires that two switches be pressed at the
same time before it will send a start signal to Sprint LC. It is more than just two
switches. It requires that both are pressed at the same time so that one switch can
not be “tied down” to disable it.
With this feature the
START switch is again disabled and will not start a test. The
anti-tie-down device is connected to the foot switch input. To start a test the foot
switch input must be held through the coupling time (or times if there are
multiple couplings). This keeps the operators hands safe on the start switches and
away from pinch points while the fixture is moving to close and seal on the test
part.
Appendix 28
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