EPSON Artisan 810 can no longer be found

Thanks for the suggestion, this procedure sounded like exactly what I'm looking for. However, it did not fix the problem. Unfortunately, I've now lost the ability to print at all from my iMac yet the scanner (same device) is detected and works just fine using Image Capture. I can view the ink supply levels on the device using the System Preferences -> Printers & Scanners interface. I can also view and manipulate the printer via a browser at it's ip address. I have the same results whether the printer is hooked up wired or wirelessly. Looking at the print queue, it tells me "Printing - Looking for printer" until it finally fails and tells me "Stopped - 'Filter' failed, 1 page",

My MBA was also seeing the printer not found, so I simply deleted the printer and re-added it and it works flawlessly from the (Yosemite) MBA. The MBA, unlike my iMac, asked me if I wanted the application epsontcpip to accept incoming network connections. I chose Allow and received one each for the printer and fax (same device). On the iMac, I just saw two entries show up in the Add (printer) menu--one kind was "Bonjour Multifunction" and the other was "Epson Fax". I got no message on the iMac about allowing incoming network connections to epsontcpip.

I've also leaned that I can open the printer utility using System Preferences -> Printers & Scanners and clean the print heads, query ink levels, etc with no issue. However, if I choose to Print Test Page, nothing happens. All of this works fine from my MBA.

Thanks for the comment--I do agree this is a great printer, which is why I've tried to keep it going. In fact, I went through various options and cnet reviews looking for another printer and it re-energized me to get this working. My iMac seems to lose track of this printer after one successful operation--and I keep running across mentions of Bonjour--it makes me wonder if that service is somehow related to this problem. Let me share my latest attempts and results:

• I found many dozen disk permission issues in the printers folder, so I repaired all permissions.
• The printer still was not found.
• I reset the printing subsystem again.
• I repaired disk permissions one more time.
• I rebooted my iMac
• I re-added the printer. In the process, the fax (same device) reports in--after about a 20-30 sec delay. The printer never did appear on the list (this behavior is different than my MBA where the printer will eventually report in).
• I finally added the fax but specified an Artisan 810 driver.
• Now, I can't even scan the supply levels (using the System Preferences -> Printers & Scanners utilities.
• Printing also fails--"Looking for printer".
• I deleted the printer.
• I then re-ran the Artisan 810 .dmg from the Epson website manually.
• I tried to add the printer but it still did not report in (just the fax again).
• I deleted the printer again.
• I then powered down the printer and powered it back on.
• Once the printer was fully connected to the network, I added it again and now an Artisan 810 (type = Bonjour Multifunction) showed up immediately
• I added it.
• I viewed the supply levels using the utility! and then printed a test page using the utility!!
• I then tried to print from a Preview session--"Looking for printer" again, argh!!
• I powered the printer off.
• I powered the printer back on and let it fully connect to the network.
• I printed the Preview session without issue.
• I tried to look at supply levels using the utilities and it still worked. However, using that same utility to print a test page results in NOTHING (no message, no anything).
• I'm very suspicious that if I power cycled my printer, I'd get another print job out of it.
• At this point, I tried to scan (using Image Capture) but it shows no devices connected.
• Thoughout this session, my MBA can print to this printer without issue.

What in the world could be causing my iMac to lose contact with the printer like this? That doesn't affect my MBA?

I'm about to give up...Any debug ideas on where to go from here?

I did find this related link ==> Yosemite Epson Artisan 835 printer error "stopped filter failed"

I followed the instructions there, even though it is quite similar to what I've done above. There was no change in my problem. I'm caving and buying a new printer--I'm just paranoid the problem will remain since my current printer works fine from other macs in the house.

I finally solved this problem! Fortunately, I tried another working printer before I just bought another and it showed the same problems. I also tried another computer--a MBP (also at 10.10.5) and it showed the same symptoms as my iMac. The faulty device was a fancy new network router I had installed. Once I switched back to my old wireless router, all worked exactly as it used to. Why this would work 100% from my MBA but not from my iMac, I have no idea. I believe it has something to with the wireless being broadcast on two different SSIDs--I did notice the printer(s) could only see the 2.4GHz signal, though I have no idea why this would work 100% for the MBA but not for the iMac or MBP.

Unfortunately, I now have to debug a problem with an expensive new router...