Glossary Of Terms - EFD Ultra 325TT User Manual

Ultra TT User's Guide
®
Version 1.2
A NORDSON COMPANY

GLOSSARY OF TERMS

Fiducial
A point of reference designed into a part or fixture that can be used to determine part or workpiece
shift. This point is often used as the "Origin" point in a program.
Jogging
Refers to moving the Ultra TT series axes to teach either points or offsets. Jogging is
accomplished by using the hard keys on the Palm handheld, the compass rose or blue field in the
Jog window, and the front panel arrow buttons.
Mechanical Home
This is when all axes have returned to their travel origination points. This is determined by the
location of the homing sensors. The Ultra TT is at mechanical home when the Z-axis is all the in
the up position, X-axis is all the way to the left most position and the Y-axis is all the way to the
back of the machine.
Dispensing Tip Offsets
This refers to the delta (change) in X/Y/Z of the dispensing tip when the tip has been removed and
replaced with a new one. It is important that you teach the new tip position so the Ultra TT can
accurately dispense your fluid.
Soft Key
Soft keys are software dependent and are designated by a highlighted function for the dome
switch immediately below the command on the LCD Screen located on the front panel.
Current
Defined as flow from the positive terminal of the power supply to the negative terminal.
Ground
The negative terminal of the power supply
Driver
Controls the current in another electronic circuit (the load). A driver is considered to be ON when
it allows current to flow in its load. A driver is considered to be OFF when it does not allow current
to flow in its load. A driver may be a bipolar transistor or a Field Effect transistor. Opto-isolated
devices are preferred. A driver may also be a mechanical switch or, preferably, an isolated relay
contact.
Load
Any component or arrangement of several components that conducts current, when a driver is
placed in an "ON" condition. The input circuitry of the Ultra TT is considered to be a load for
external driver circuitry. The input circuits of external circuitry are considered to be loads for the
output drivers of the Ultra TT.
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