Yesterday I was assisting friend who new to cnc. We developed a design using VCarve Pro to run on his recently purchased Laguna IQ cnc router. Once he completed the design we were able to transfer the gcode file to a flash drive and get it to successfully run on the IQ. However, when we decided to make a change in the design and re-run it, we ran into a problem. We successfully changed the design, generated the tool path gcode as before and transferred it to the flash drive. When we inserted the flash drive into the had controller and clicked on the USB drive the controller indicated that there was no file there even though both the first gcode file and the new one was on the drive. Much to my surprise he told me that you had to turn off the machine and turn it back on then re-inset the flash drive for the files to show up on the controller when you click on the USB drive. We turned the IQ off and back on and sure enough we could see the files when when we clicked on the USB drive. Surely there is a procedure/step to eject/remove the USB drive and re-insert it without having to reboot the machine. An email and a call to Laguna tech support did not get a response.
Is there a proper procedure to safely eject/remove the USB drive from the controller so that you do not have to reboot the IQ to get it to recognize the re-inserted USB drive and see the files? If so, what is it?