PASCO ME-8950A COMPLETE ROTATIONAL SYSTEM - Manual (Page 10)

Complete Rotational System 012-05293F
6
nylon thumb-
screw
10-spoke
pulley on
vertical
shaft
accessory
mounting rod
"A" base
pulley
mounting rod
Photogate Head
(optional)
Super Pulley
6. When the Photogate Head is powered by a computer
interface, you can tell when the photogate is
blocked by watching the LED indicator on
the photogate.
To use the Super Pulley and Photogate Head
with the Pulley Mounting Rod:
1. Attach the Super Pulley -- and the Photogate
Head if needed -- to the Pulley Mounting
Rod.
2. Insert the pulley mounting rod into the hole
in the Accessory Mounting Rod and tighten
the thumb screw. See Figure 4.
3. Rotate the accessory mounting rod so that a
string from the pulley on the center shaft will
be aligned with the groove on the Super
Pulley.
4. Adjust the position of the base so the string
passing over the Super Pulley will clear the
edge of the table.
spring
bracket
spring
square nut
pulley
indicator
bracket
thumbscrew reference mark
(center of post)
Figure 5: Center Post Assembly
ME-8952 Centripetal Force Accessory
Center Post Assembly
Assemble the center post as shown in Figure 5:
1. Attach one end of the spring to the spring bracket and
connect the indicator disk to the other end of the
spring. Insert the spring bracket into the slot on the
center post and tighten the thumb screw.
2. Tie one end of a string (about 30 cm long) to the bottom
of the indicator disk and tie a loop in the other end of
the string.
3. Insert the indicator bracket into the slot on the center
post, placing it below the spring bracket. Tighten the
thumb screw.
4. Attach the pulley in the higher of the two holes on the
center bracket.
5. Insert the thumb screw at the bottom of the center post
and attach the square nut.
indicator
disk
Figure 4: Using the Accessory Mounting Rod With the Pulley
Mounting Rod, Super Pulley, and Photogate Head
center
post