the laser obstacle
,
so as to make the boom be perfectly vertical
.
(2)
The blue laser obstacle on the spindle near the boom is the laser
obstacle to stop the boom after it lies horizontally
:
When the boom is at the rising limit position
,
adjust this laser
obstacle to make it point upwards and form an angle (90°) with the
arm
.
When the laser obstacle moves into the slot and the red light is
on
,
the falling limit will work and the boom will lie horizontally
.
Check
the horizontal angle between the boom and the horizontal position and
adjust the laser obstacle
,
to make the boom be perfectly horizontal
.
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