Cooling Pump; Suction Valve; Amplitude Control - Integra Cusa Excel Service Manual

Machine Control Board
Table 7-3.
Cooling pump voltage steps
Table 7-4.
Handpiece amplitude control
voltages
7-6

Cooling Pump

Cooling pump control results from the same kind of operation as irrigation and
suction pump control. The 3-bit D/A output signal range for the cooling pump is
approximately 0 to 5.1V DC. The following table shows the cooling steps:
cool step
desired voltage
default 2.208
max 5.152

Suction Valve

Optically isolated digital circuits control the suction valve. When current moves
through an internal LED, the output open collector transistor is saturated. The
pull-up resistors and the controlling hardware reside on the destination board.

Amplitude Control

The handpiece amplitude control circuit, a 4-bit D/A output signal range for the
handpiece control, operates from approximately 0 to 10V DC. The op amp
maximum supply voltage is 15V, so two diode drops prevent the op amp from
seeing the full 15V from the supply. The following table shows the handpiece
amplitude control steps:
amp step desired voltage
2.208
CUSA EXcel Ultrasonic Surgical Aspiration System Service Manual
+5v_x= 5.6v
setpoint theoret v
1 0.73
2 1.46
3 2.19
4 2.94
5 3.67
6 4.40
7 5.13
D/A code theoret v
1 1.00
2 2.01
3 3.01
4 4.04
5 5.04