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1.
How does it work?
Perun V3 Optical uses optical switches for the detection of sector gear, trigger and selector
plate position. It has no moving parts at all. That provides not only great reliability but also
flexibility, thanks to which Perun V3 Optical will work without problems in almost any
combination of gearbox shells, triggers, selector plates and sector gears.
Key elements:
1 – sector gear optical sensor (small, black element)
2 – trigger optical sensor (small, black element)
3 – sector gear IR LED diode (small, yellow element)
4 – trigger IR LED diode (small, yellow element)
Optical sensors and IR LED diodes work in pair as a barrier switch. If the trigger is at rest, the
infrared radiation flows from the diode to the sensor. Once the trigger is pulled, it obstructs
vision between the trigger sensor and diode signaling that a shot should be fired.
The same principle is used for the sector gear. When sensor (1) and diode (3) are obstructed,
it means that a gear tooth is between them. Perun V3 is using information whether gear teeth
are present or not, to determine which gearbox cycle phase is currently taking place.
Algorithm used for counting teeth allows any gear to be used and no adjustment has to be
made to enable compatibility with DSG or short-stroked gears. The only exception are
Max/Infinite Torque gears, which are incompatible with Perun V3
Optical
.
In Perun V3
Optical
, “SAFE” mode is provided by stock mechanical trigger lock. To see the
difference between “SEMI” and “AUTO” selector positions, the selector plate position is
detected by an IR reflective sensor, which is indicated by a red circle on the photo below.
It works by emitting infrared radiation and checking how much of it is mirrored back by the
opposite surface. Most radiation is reflected, if the opposite surface is white and close to the
sensor, and the least if it is black and far away (more than 5mm). When the selector is in
“AUTO” position (or “SEMI” in AK type replicas), the selector plate sticker delivered together
with Perun should be covering the selector sensor, reflecting a lot of infrared radiation back
to the sensor, indicating “AUTO” (or “SEMI”) selector position.
