PASCO ME-6800 Projectile Launcher (Short Range) - Manual (Page 9)

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M o d e l N o . M E - 6 8 0 0 , M E - 6 8 0 1 G e n e r a l O p e r a t i o n o f t h e P r o j e c t i l e L a u n c h e r
0 1 2 - 0 5 0 4 3 G 5
• Align the square nut of the bracket with the T-shaped slot on the bottom of the Launcher barrel and slide the
nut into the slot until the photogate nearest to the barrel is as close to the muzzle as possible without blocking
the photogate beam. Tighten the bracket thumbscrew to secure the bracket in place.
Repairing the Plumb Bob
If the string breaks that holds the plumb bob on the protractor of the
Launcher, replace it with an equal length of nylon thread (such as the thread
included in the ME-6802 Launcher Spares Kit). Make sure that the replace-
ment string is long enough so that when the Launcher is inclined at an angle
of 50°, the string extends well below the corner of the Launcher. Carefully
thread the replacement string through the small hole at the vertex of the pro-
tractor and tie a triple knot at that end of the string. To put the plumb bob
onto the string, thread the string through the hole in the center of the plumb
bob and tie a triple knot in that end of the string.
Projectile
Launcher
barrel
Square
Nut
Thumb
screw
Photogate
Photogate
Photogate
Mounting
Bracket
3/4”
Thumb
screws
Optional Photogate Mounting Bracket
T-slot
Plumb bob
Tie a triple knot
in the end.
Thread through
the hole.
Make the string
long enough.
Vertex
Repairing the Plumb Bob