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The assembly should be like this:
Before screwing, verify the rotation
angle first. Take the orientation of
the tilt servo shaft as the right side,
as shown below. The pan servo
should rotate within the range from
0 to 180 degrees, left to right; the
tilt servo should rotate also 0 to 180
degrees, front to back.
Pay attention to the orientation
during the assembly. If you find any
error in the course, do not try to turn
the axis of the servo; instead, you
should disassemble it and then
assemble the parts again.
c)
Then fasten them with an M2*4
screw.
The M2*4 screw is contained in
the package of the servo and is
the shortest of the screws.
Right