TPT Wirebonder www.tpt.de Page 42 of 53 September 2016
36. Ultrasonic Generator
The signal from the logic control circuit, the ultrasonic generator provides 62 kHz power to the transducer at a
level set on program. The ultrasonic energy is applied until the bond time is complete. (PLL) phase loop lock
system is provided to insure work piece coupling, and to maintain transducer operation at the specified
frequency.
36.1. Force System
The force generator provides current to effect the bond force. On signal from the logic control circuit, the
current is provided to the force solenoid in a ramped fashion until the preset level is reached. At this level the
power is held until the bond time is over. The force level and bond time are preset by the front touch panel
controls.
36.2. Electronic Basic force adjustment
Figure 22
Basic Bond force 17 – 20 gram
Use a gram gauge to measure the static bond head force. Place the point or arm of the gram gauge at the end
of the transducer. Slowly raise the gauge until the transducer lifts and a gauge reading is required force
Basic Force adjustment is made in Bonder.ini file
BasicForce: 160 to 300 // Magnet basic force as DAC value
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