Thank you for using the forum.
I would recommend pinging the printer: http://www.support.xerox.com/support/WC6505/support/en_US.html?objGUID=11667
There may be an issue that your IT person would need to check on.
You may also check for solutions in the product support content.
If you still need assistance you may contact US support at the following link https://www.office.xerox.com/smart/emailsupport/ or call 1-800-835-6100.
I have a work centre 6505 printer that occasionally unattaches itself as a saved printer and I have to restart my computer, reload the drivers or re-add the printer to get it to be recognized again. It happens usually when trying to print a few different things and sometimes after big jobs. I will print one document and then try to print another document and the printer will be gone. I check my usb setting to see if it was going to sleep and that isn't the case. The printer just randomly vanishes. Any thoughts here?