Unknown USB (Device Decriptor Request Failed)

Issue When you plug in the USB cable from the LT-2D3D/LT-55 XL a notification bubble appears in the lower right corner of the screen. Unknown USB Device (Device Descriptor Request Failed) Cause The driver that is used to allow the encoder (how the laser measures angles) has been either updated to an incorrect Microsoft Driver. […]

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Install CDM (USB) Driver

The CDM (USB) Driver allows the Tablet PC to communicate with the Laser/Encoder via USB. This is installed on every Tablet PC before it is shipped however if the Tablet PC does recognize the laser is connected but it will not connect through the LT-2D3D/LT-55 XL software, re-installation of the CDM Driver corrects the problem. […]

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