Lambda beam user manual
3.6. TROUBLESHOOTING
3. Finally disconnect the laser head from the controller.
3.6
Troubleshooting
If the device is detected by Ltune, but there is no laser emission:
Please make sure that these conditions are met:
• The green
is lit continuously (if not, please check the bottom of the Ltune window
for error messages).
• The interlock connector is closed
• The key switch is set to the ON position
• Either Constant Power Mode is selected or a proper signal is connected to the mod-
ulation inputs
• If connected to a computer: The power on/off button in Ltune is turned on and an
output power larger than zero is selected
If the yellow
is flashing, please run Ltune and check the bottom of the window for
error messages.
If the device is not detected when Ltune is started
First of all, please disconnect the laser from the computer, restart the computer, connect
the laser again and start the Ltune software.
If the laser is still not found: The Ltune software communicates with the laser using a
”virtual serial port”. If the driver is installed correctly, it should show up in the Windows
Device Manager. You can open the device manager by clicking Start -> Control Panel (->
Performance and Maintenance) -> System -> Hardware -> Device Manager.
In the device manager, please open the ”Ports (COM & LPT)” subtree. One of the COM
ports listed there should belong to your laser. If you right-click on the correct item, choose
”Properties” and then the ”Driver” tab page, it should read: ”Driver Provider: FTDI” and
”Driver Version: 2.8.14.0” (or later). If this is the case, please start Ltune and try to select
this COM port manually by unchecking ”Auto-scan all serial ports” in ”Device setup”.
If your laser is not listed in the device manager or marked with an exclamation or
question mark, please try the following:
1. Disconnect your laser from the computer and from power supply.
2. Download
http://www.ftdichip.com/Resources/Utilities/FTClean.zip
and run this tool
to remove the FTDI driver from your computer.
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