PASCO ME-9871 User Manual
Instruction Manual
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ON/OFF
Switch
External Input Port
(Maximum; ± 6 VDC)
Speed Control
Knob
Accessory
Tray
Holes for ME-9496
Tim e Pulse
Accessory
1.8 m Cable
Threaded
Hole
Threaded
Hole
1/4-20
Threaded
Hole
3.5 mm
Plug
Banana
Plugs
*012-06880*
Variable Speed Motorized Cart
ME-9781
012-06880B
Included Items Included Items
Variable Speed Motorized Cart 1.8 m Cable Assembly, 3.5 mm plug
Power
The PASCO V ariable Speed Motorized Cart can use four “C” cells (batteries) that are not included. NOTE: The PASCO PI-6603 is
a four pack of “C” sized alkaline batteries. The cart can also be powered by a DC power supply (such as the PASCO SE-9720 18
VDC, 5A supply), or by certain PASCO Interfaces (such as the ScienceWorkshop 750 Interface and the Power Amplifier II
(CI-6552A), or the Universal Interface 850), or the PASCO Xplorer GLX datalogger (PS-2002) and GLX Power Amplifier
(PS-2006).
The included cable has a 3.5 mm phone plug at one end and banana plugs at the other end. The banana plugs can be connected to
the output ports of the PASCO Power Amplifier, for example. The 3.5 mm plug fits into the External Input Port on the cart.
800-772-8700 www.pasco.com
®
Variable Speed Motorized Cart ME-9781
Other Equipment
Recommended Equipment* Recommended Equipment*
Starter Dynamics Track (ME-9493) Time Pulse Accessory (ME-9496)
Force and Motion Track (ME-6958) Ballistic Cart Accessory (ME-9486)
Classic 1.2 m or 2.2 m Dynamics T rack (ME-9435 or ME- 9458) Power Amplifier (CI-6552A or PS-2006)
P AScar 1.2 m or 2.2 m Dynamics Track (ME-6953 or ME-6954) Motion Sensor (CI-6742 or PS-2103)
PAStrack 1.0 m (ME-6960) Force Sensor (CI-6537 or PS-2104)
Dynamics Track Mount (CI-6992) Rotary Motion Sensor (CI-6538 or PS-2120)
Track String Adapter (ME-6569) PASCO Interface and data acquisition software
*See the PASCO cata log or the web site at www.pasco.com for more information.
Introduction
The ME-9781 Variable Speed Motorized Cart incorporates many features of other PASCO carts including precision bearing wheels
and an accessory tray. The cart also has a regulated voltage and motorized rear wheels th at are geared to operate at cons tant s peed.
The speed control knob adjusts the speed from 8 centimeters per second (cm/s) to 25 cm/s. The speed of the cart can also be varied
automatically and remotely using the Time Pulse Accessory, DC power supply, or a PASCO Interface. An external voltage source
such as the Time Pulse Accessory connects to the External Input Port on the cart.
The motion of the cart can be measured in different ways. You can use a PASCO Interface and a Motion Sensor or Rotary Motion
Sensor. The motion can also be measured using a plastic “picket fence" (ME-8933 or ME-9804) that fits into the slots of the accessory tray, and a Photogate Head (ME-9498A) connect ed to a Smart Timer (ME-8930), Photogate Timer (ME-9215B), or PASCO
Interface. You can also measure the motion using a measuring tape (PM-8761 or SE-8712A) or meter stick (SE-8695) and a stopwatch (ME-1234).
The features of the Variable Speed Motorized Cart expand the scope of experiments that are possible with the PASCO Dynamics
System (Carts and Tracks). By powering the cart with a PASCO Interface and Power Amplifier, the physical manifestation of several different wave forms can be demonstrated.
Operation
Battery Installation
Install the C-type alkaline batteries (not included) in the battery clip compartment on the bottom of the cart. Estimated battery life
is six hours or five kilometers (km).
Manual ON/OFF
Start and stop the cart manually using the ON/OFF switch.
Speed Adjustments
Adjust the speed manually by turning the Speed Control Knob. Turning the knob clockwise increases the speed. Turning the knob
counterclockwise decreases the speed.
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®
ME-9781 012-06880B Operation
CAUTION: Never supply the Variable Speed Motorized Cart with external source
voltages greater than ± 6 volts.
Time Pulse
Accessory
START push
button
TIME control
switch
VARIABLE
control knob
Figure 1: Time Pulse Accessory
External
Input Port
External Voltage Source
Switch the ON/OFF switch to OFF (EXT .). The cart can now receive power from the external voltage source and the battery is shut
off.
Use the included cable to connect the External Input Port (EXT. INPUT) on the cart to an external voltage source.
Remote Control through a PASCO Interface
1. Switch the voltage input to “external” by moving the ON/OFF switch to OFF (EXT.). The cart can now receive power from the
external source and the battery is shut off.
2. Connect the Variable Speed Motorized Cart to the PASCO Interface.
• If you are using a PASCO 750 ScienceWorkshop Interface and Power Amplifier, use the included cable to connect the External
Input Port (EXT. INPUT) on the cart to the power output ports on the Power Amplifier.
• If you are using a PASCO 850 Universal Interface, use the included cable to connect the External Input Port on the cart to the
power output ports of the 850 Interface.
3. Start the P ASCO data acquisition software (such as DataStudio or Capstone) and choose and adjust the signal that you want the
interface to output. (See the software instructions for more information.)
4. In the software, click ON in the signal control window to start outputting the signal.
5. Click OFF in the signal control window to stop outputting the signal.
ON/OFF by Time Pulse Accessory (ME-9496)
1. Mount the PASCO Time Pulse Accessory on the Variable Speed
Motorized Cart by inserting the studs on the bottom of the Time Pulse
Accessory into the holes in the accessory tray of the cart.
NOTE: Be sure that the ON/OFF switch is in the OFF position before
doing the next step.
2. Plug the 3.5 mm phone plug of the Time Pulse Accessory cable into
the External Input Port on the Variable Speed Motorized Cart.
3. Test the Time Pulse Accessory.
• Turn the TIME control switch on the Time Pulse Accessory to
“0” (0 = 1 SEC).
• Flip the ON/OFF switch on the Variable Speed Motorized Cart to ON.
• Gently press the START push button on the Time Pulse Accessory.
After a two second delay, the Motorized Cart should turn on automatically and run for one second before turning off automatically.
Test the oth er time intervals on the TIME control switch in the same manner.
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