Go Direct^® Projectile Launcher (GDX-PL)

Specifications and User Guide

Troubleshooting

General: Connect your sensor as described in the Getting Started instructions for your device.

• Primary Test: Verify that the Projectile Launcher is powered using the USB cable connected to a USB port on a computer or Chromebook, a USB wall outlet, or a USB power brick.
• Secondary Test: Check that the hand pump is securely attached to the valve on the launcher. Watch the pressure gauge on the hand pump as you pressurize the system, and verify that the system is holding the pressure and that there are no pressure leaks.
• Tertiary Test: Double-check that you continue to hold the “arm” button while you press the “launch” button. The two buttons must be engaged simultaneously to launch the projectile.

Additional Troubleshooting

• How do you perform a basic launch with the Vernier Projectile Launcher or Go Direct Projectile Launcher?
• My software does not recognize the Projectile Launcher.
• My Vernier Projectile Launcher does not fire.
• Projectile launcher does not register block / unblock events.
• What can I do about corrosion on the launch ball for the Vernier Projectile Launcher?
• The Time of Flight pad sometimes fails to work.
• Why don't I get consistent launch speeds with my projectile launcher?
• The projectiles for the Vernier Projectile Launcher and Go Direct Projectile Launcher do not easily go into the barrel.
• What is the volume of the air chamber in the Projectile Launcher?
• Why should I buy the Vernier Projectile Launcher instead of the one from Arbor?
• Independence of Motion Accessory Troubleshooting & FAQs
• Time of Flight Pad Troubleshooting and FAQs
• Vernier Projectile Launcher Troubleshooting and FAQs

Specifications

• Launch angle: 0 to 90 degrees
• Initial launch point (independent of angle)
  ⚬ 0.146 m above the base
  ⚬ 0.030 m from the back plane
  ⚬ 0.082 m from the side
• Launch speed: 0 to 6 m/s
• Maximum launch distance: 2.5 m
• Internal photogate interval: 0.050 m
• Steel ball diameter: 0.01746 m (11/16 in)
• Steel ball mass: 21.8 g
• Power: USB power source (USB port, USB wall outlet, or USB power brick)
• Connections
  ⚬ Wired: USB 2.0 full speed
  ⚬ Wireless: Bluetooth^® v4.2 (wireless range 30 m unobstructed)

Calibration

For this sensor, only the angle measurement can be calibrated.

1. Rotate the launch barrel until the attached bubble-level indicates the barrel is level.
2. Click or tap the sensor meter associated with the angle measurement and select Calibrate.
3. Enter 0 as the known angle, then click or tap Keep.
4. Click or tap Done to complete the calibration. (The new calibration will be written to the sensor automatically.)