Omtech Not connecting via USB

3 things to check for:

Did you follow the installation instructions? Specifically the portion about group membership?

sudo adduser $USER dialout && sudo adduser $USER tty
If you haven’t done this you will need to relogin after executing this to reflect the group permissions.
2. Can you confirm that a serial device is created for the laser? Run this in a terminal.

ls /dev/*USB*
There should be a port dedicated to the laser. If you don’t see one there then something isn’t working correctly.
3. In that case check your system messages. Can you unplug and replug the laser and then run this in a Terminal:

dmesg | tail -n 30
Return the output here.