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Page 44
Regalia Service Manual
The main shaft needle position sensor disc mounts to
the main shaft near the hand wheel. It is composed
of an aluminium disk with a cutout for needle up and
needle down positions. This disk is set on a flat on the
Amara/Forte machines; however it does not follow
the first screw in direction of motion rule. The second
screw is the one set on the flat. The sensor board is
mounted directly to the top of the control board .
With the take-up lever in its highest position, the first
screw is at the front and the edge of the cutout is
aligned with the sensor. The 2nd screw is on the flat.
The disk is centered front to back in the sensor slot.
The take-up lever is up at this time.
There is a forked circuit board containing an
emitter and a receiver for the encoder region. With
the front cover removed, the cables connected
and the machine powered on, the green “NEEDLE”
LED on the right of the control board can be seen.
It will turn on when the take-up lever is at its
highest position, and stay on until the needle is at
its lowest position. The LED is off until the take-up
lever once again reaches its highest position and
then turns on again. The main shaft encoder board
(# QM20052) does not have any LEDs on the board.
Section 17: Electronic Information - Needle Position
Sensor