The 2880 Auto Sheet Loader is engineered to accept media up to 250gsm. Thicker sheets should be loaded using the rear feeder. I have used the Auto Loader for many sheets of Silver Rag and Exhibition Fiber on my 2200 but, recently, I was advised by our Epson Field Engineer that feeding heavy sheets through the Auto Loader can compress the feed rollers and cause problems down the road. He also mentioned that you may have a job stuck in the cue that is causing the sheet rejection. This should be cleared out by having the printer off for a while. My guess is when the printer is let out of the "dog house" all will be well but I'd use the rear feeder for sheets heavier than 250gsm. Let us know how things progress.
Thanks for that ... it is interesting that what can and can't be used is defined by weight and not thickness/caliper ... they are obviously correlated, but I would think it is thickness that actually matters and not weight. I may try and ask customer support what thickness is supported by the auto-loader and see what they say ... I'll describe a non-name 245gsm paper that is 12.5 mil thick and see what they suggest.
The Ultra Premium Matte Paper (auto loader compatible) is 10.3 mil thick ... the Ilford is 12.5 and the Exhibition Fiber is 13 ... the fine art papers are close, but materially bigger.
Lots of the other fine art papers are much thicker ... e.g. the Velvet Fine Art paper is 19 mil thick.
I've read a bunch of (internet forum) reports of folks putting the Exhibition Fiber through the sheet loader no problem, but I don't want to compress the rollers - which I could see happening.
Cool. Will keep y'all posted ...