Tying the frame parts of the laser to each other, and a ground connection can eliminate this. This is especially common with lasers driven by belts that interact with plastic wheels. If the laser is not grounded (earthed), that static build-up can eventually discharge through the USB connection to the PC, causing comms errors. If your laser is not bonded, static can build up on the laser head or rails. Poor bonding / grounding - Bonding is tying the various metal parts of a device together, so that if one part builds up a charge, all the other parts build up the same charge.

Any of these things powering up may cause a small power drop that can make the laser 'brown out' and temporarily disconnect or reset. Another device on the same circuit as your laser, like a mini-fridge, air compressor, water chiller, etc.If your cable is longer than this, it may need an amplifier or active extension for the signal to remain strong enough to be read correctly at the other end. USB cable length - USB cables are limited to 16 feet.If your laser came with a cable, try a different one. Poor quality USB cables, lacking shielding or noise suppression.The most common reasons for connection loss with USB are: (See Connecting to the Laser for details) Some systems don't automatically connect - you might have to choose the correct port the first time.Make sure you are physically connected to the laser, and have chosen the correct type of laser or controller in LightBurn, and the right connection method.If you use a Trocen controller, you might have to install LaserCAD to get their driver.On Windows systems, a driver for Ruida and TopWisdom controllers is available at the end of the LightBurn installer - just check the box for the FTDI driver.A common driver for Chinese diode lasers is this one:.If your machine came with its own software, you might have to install that in order to get the driver for your device. Make sure you have any necessary drivers installed for your laser.Troubleshooting Troubleshooting - Connection Issues ¶ Can't connect to the laser ¶

Lightburn software stops working