Sunday, February 18, 2018

Paper Loading Error

Not long ago I finished a print job that took me near the end of a 24-inch roll of Epson Luster paper. I removed the roll and found, after cutting away the usual end-of-roll scrap (the adhesive patch that pretends to attach the paper to the core), that I had exactly 17 inches of usable paper. I placed that under my heavy cutting mat to help flatten the curl. Nothing unusual or interesting about any of that.

A few days later I got a job to make two black and white prints on 11 x 17 inch sheets; the job, and the images perfect for that little bit of luster I'd saved. The sheet had flattened pretty well. Using my cutting rail and an Xacto knife I cut it into two sheets of the appropriate size, set up the print job, and fed the first sheet. I could hear the feed rollers slipping, and the sheet didn't feed into the printer as they normally do. This appeared on the 7900's LCD:
I removed the sheet, cleared the error, and tried again with the same result. I've fed hundreds of sheets into the machine and I don't recall ever seeing this before. It's been rare, but I know I've fed sheets I've cut, either from larger stock or from roll paper, and had no troubles.

I removed the sheet and because the cut edges were slightly raised I used a burnishing tool to smooth them. When done all edges felt the same; no raised edge. But feeding the sheet I got the same slipping feed rollers and the same error.

If I wanted to use these sheets I didn't have many options left. I tried forcing the paper when I heard the slipping rollers. That didn't help, but had it worked I suspect the sheet would have been misaligned anyway. Eventually, after several retries, the rollers grabbed the paper, fed it normally, and I got a perfectly centered print.

I had exactly the same experience when making the second print, but at least I knew the sheet would eventually feed. Since then I've made a number of prints on boxed sheets of CIFA Baryta; those fed perfectly. I still don't know why my cut sheets, after smoothing the cut edges, provided such a challenge.

  --Jay