Chicago Pneumatic CS7000 - Manual (Page 25)

Chapter 2. Identifying the Components
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December 2005
Page 2-9
The TCM has a small four-digit display, a column of nine indicator LEDs, and two potentiometers.
The LEDs provide status and condition information about the connected nutrunner. The indicator
LEDs are labeled:
• READY • ANGLE HI
• GOOD • ANGLE LOW
• BAD • SPINDLE FAULT
• PEAK TORQUE HI • SERVO FAULT
• PEAK TORQUE LOW • MOTOR ENABLE
• BUS VOLTAGE PRESENT
To understand the meaning of these LEDs and potentiometers when they are lit, refer to TCM Related
Faults in the Visual Supervisor User s Guide (part number 39-30-34823).
Servo Amplifier
The servo amplifier is a three-phase, brushless DC motor controller that provides electrical power to
the nutrunner motor. It receives control signals from the DCM. Based on the state of these inputs, the
servo amplifier energizes the motor windings to rotate the motor.
The servo amplifier serves as a closed-loop speed controller. It modulates the motor winding currents
in order to maintain a constant motor speed despite changes in load. Additionally, the servo amplifier
can stop the motor quickly by way of dynamic and/or 4-quadrant braking. The servo amplifier boards
are paired with the DCM board and are housed inside the TCM.
Gen2 Device Control Module (DCM)
A 3V lithium battery is located on the DCM board. You must remove the DCM board from the TCM
in order to replace this battery. A generic 3V lithium battery (Duracell DL 2430 or equivalent) can be
used. A jumper JP1 located near the back of the TCM can be removed to disconnect the battery
from the circuitry.