Independence of Motion Accessory (IOM-VPL)
Specifications and User Guide

Primary Tests:
– Does the Vernier Projectile Launcher or Go Direct Projectile Launcher launch a projectile when the Independence of Motion Accessory is not attached?
– Do you have power to the launcher?
The Vernier Projectile Launcher requires power from a interface or LabQuest® Power Supply (LQ3-PS).
Go Direct Projectile Launcher requires power from a USB power outlet, USB power brick, or active USB port on a device.
– Is the Independence of Motion Accessory seated completely into the barrel of the Projectile Launcher?
Make sure the device is completely seated into the barrel and the cotter pin is in place to ensure it is positioned correctly.
It can take some effort to push it in all the way.

Secondary Test:
– Does the vertically dropped ball (metal or plastic) release simultaneously?
Occasionally the ball (especially the plastic ball) that sits on the metal pin gets hung up.
Putting the ball on and removing it several times should eliminate any unwanted friction that may interfere with its operation.

– Do not insert the drilled balls into the main barrel; use them only on the outer pin.
– The photogates in the projectile launchers cannot be used simultaneously with the Independence of Motion accessory.

For the Vernier Projectile Launcher (VPL)
Vernier Projectile Launcher Troubleshooting and FAQs

For the Go Direct® Projectile Launcher (GDX-PL)
Go Direct Projectile Launcher Troubleshooting and FAQs

The device slides (with resistance) into the barrel and seats (using two “O” rings) into the launching chamber. It is secured in place with a plastic cotter pin. The burst of air pushes a ball at the angle of the barrel (typically horizontal) from the extended barrel and simultaneously releases another ball to drop in free fall.

Time of Flight Pad (TOF-VPL)
Projectile Stop (PS-VPL)