Setup – PASCO ME-9341 INTRODUCTORY ROTATIONAL APPARATUS User Manual

Page 8

Introductory Rotational Apparatus

012-03051F

➀ Place the base on a flat table. Place the bubble

level on top of the base, then adjust the leveling
supports until the top of the base is level.

➤ NOTE: Leveling the base is important. Not
only does it ensure the accuracy of your experi-
mental results, it also prevents uneven wear on
the bearings.

➁ Slide the spindle into the bushing of the bearing

assembly. Either end of the spindle can face up,
but you will want the long end facing up if you plan
on using the auxiliary platter, the ring, or the bar.

➂ Place the Main Platter over the spindle. The step

pulley can face up or down, but should face down
if you plan on using the auxiliary platter, the ring,
or the bar.

If you are using a standard photogate timer:

➃ See the "Timing with a Photogate" section.

If you are using the Smart Pulley:

➄ Slide the stem of the Smart Pulley clamp into ei-

ther of the two bushings near the edge of the base.

➅ Place the Smart Pulley rod through the hole in the

Smart Pulley clamp, level the pulley, and tighten
the screw. (Use the upper hole in the clamp if the
Step pulley is facing down, the lower hole if the
step pulley is facing up.)

➆ If you wish, attach a rubber band (not included)

over the rod of the Smart Pulley and a leg under
the base, as shown in Figure 3. This can be useful
in collision experiments, in which an extra "hand"
may be needed to keep the Smart Pulley in contact
with the platter.

➇ See the Smart Pulley System manual for connect-

ing and using the Smart Pulley. For most experi-
ments using the rotational apparatus, you will want
to use Option M – MOTION TIMER from the
Smart Pulley main menu. When you are ready to
begin timing, just press the Smart Pulley lightly
against the edge of the platter.

If you are applying torque with a hanging mass:

➈ Attach a piece of thread to the step pulley using the

screw to hold the thread, or tying it to the hole in
the smallest pulley (see Figure 4).

Setup

➉ Thread the thread through the holes in the step pul-

ley to the desired level. (For instance, thread it
through one hole if you are using the smallest pul-
ley, two holes if you are using the medium size pul-
ley, etc.)

(TOP VIEW)

(SIDE VIEW)

Main platter

Smart Pulley clamp

Smart Pulley

Spindle

Rubber band

Universal

Clamp

Hanging

Mass

Pulley

Thread parallel to
platter.

Figure 4 Threading the Step Pulley

Figure 3 Setting Up the Rotational Apparatus

Tensioning Screws