TM 5-3610-253-14
(4) Positioning computer (AR). Receives the backgauge position information
from the TAM circuits, and passes it along to the positioning computer interface
circuits (IAR). It also contains the logic circuits used during cutting operations,
and backgauge movement operations.
(5) Positioning computer interface (IAR). The IAR board is used to interface
all the operating switches to the AR circuits. It converts the voltage levels from
the switches to the proper voltage level used in the AR circuits. It also is used to
interface positioning information from the AR circuits to the LED measurement
display. Additionally, the IAR board interfaces the light barrier circuits to the AR
circuits, the AR circuits to the monitor channel (KK) circuits, and the hardware
channel (HK) circuits. As described previously, the IAR circuits also interface the
backgauge control signals to the motor logic (ML) circuits. The IAR board has an
amplifier on it for control of the locking valve (M1) in the clamping operation. Two
switches on the IAR board are used to change the LED measurement display from inches
to metric (S2) and to move the decimal point when in the metric mode from mm to cm
(S1). Inputs and outputs of the IAR board can be checked by 14 LED indicat ors on the
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