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MICROCHINE
The MICROCHINE represents the latest PACE development in hand machining for the circuit board rework
and repair. The self-contained motor handpiece connects to the PRC 2000 via a special connector. The
motor unit can be actuated by a fingertip control switch or the foot pedal. A tachometer feedback loop
between the motor and controller keeps the speed that you select constant as the load on the motor
changes. Below and to the right of the MICROCHINE you will find a connection jack labeled "PROBE
BRAKE" which offers additional control of milling and drilling operations. Connecting the probe to a
conductive element where you wish machining to stop will cause the motor to stop immediately as soon
as contact is made. This feature can also be used to protect other circuit elements (e.g., adjacent lands
or circuit traces) when machining in the tight spaces often found on todays' circuit assemblies. The LED
will light Green when the unit is running and Red when the probe brake has been activated. The LED will
shift its color from Green to Yellow when the motor has reached its maximum load. This is normally an
indication that too much pressure is being applied to the workpiece. The control knob regulates the speed
of the motor unit so that it can be easily set for the work to be performed. The MicroChine uses the same
collet previously found in the PACE MiniChine systems, so that all existing bits will be interchangeable
and features the same special static dissipative housing material found in all PACE soldering/desoldering
handpieces. An optional chuck is available to accomodate variable shank diameter bits.
Figure 4. MicroChine Section
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