Sonics E-Press - Manual (Page 34)

Sonics E-Press Manual Page 34
Glossary of Terms
TOC
Align
– The horn moves to the travel distance in order to position the unwelded parts and fixture.
Creep Speed
- A very slow final approach speed used to find the plastic parts. It is used to avoid impact
damage to the parts that would occur if the travel speed were to be used all the way to the parts.
Deflection
– A measurement taken at the parts position which indicates the expected bending of the
ultrasonic press with applied pressure. Deflection will degrade the position accuracy of the system.
Delay Time
– The programmed duration which the horn is on the part before the weld begins.
GX
– The Ultrasonic Power Supply with microprocessor.
Encoder
– Provides optical position feedback of the motor position. This is the number presented in the
position data screens.
Force Trigger
– The amount of force applied before the weld begins. Foce is measured with a load cell
mounted in-line to the stack assembly and the screw actuator.
Hold Time
– The programmed duration which the horn is held on the part after the weld ends and before the
horn travels home.
Home Position
– The full upward start position.
Logger Form
– Programming form which prints a status line after every weld. Data may also be sent to a file
for later examination or simultaneously to a printer.
Lower Tolerance
– The search window position below the taught position which is the expected minimum
limit where the parts will be found. If parts are not found before the lower limit position, the cycle will be
aborted.
Press
– The mechanical assembly which holds the ultrasonic stack and provides a rigid platform to hold the
parts and fixtures.
Status Line
– The Printed line on the logger form. Also the distance report on the LCD display.
Stall/Slip
– When the stepper motor cannot maintain phase lock with the rotating magnetic fields within the
motor. Caused by too much applied force or a field velocity too high to maintain physical alignment.
Stepper Motor
– A special type of rotary positioning motor. Alternately energized phase coils will
magnetically move the rotor in order to control its final position.
Stepper Setup Form
– Programming form used to input the control settings for velocity and position.
Teach
– The method used to define the precise position of the parts to be welded. The system moves
downward at slow speed until force is detected by the load cell. This defines the top of the parts!
Travel Velocity
– Initial velocity used to approach the parts. The system will switch to a creep speed just
above the parts and slowly find the parts.