I think that my co-worker won't mind my sharing this story:
He was out on a bizhub 754e/FS-534 that has a long history of J72-17 and J72-19 jams, but they were never reproducible. I had been there on a few occasions, but this was his turn.
As luck would have it the enduser with the problem showed up at his elbow asking about that terrible jamming problem (that noone else has ever experienced). She explained that she gets this cardstock (the famous "cardstock"). By appearances it's about 300gsm. It might surprise you that the enduser is a teacher. The conversation goes something like this:
Enduser: "So I take this cardstock. It comes as 9" x 24", so I cut it exactly in half to get two pieces 8 1/2" x 11" letter.
Tech: "You do?"
Enduser: "Yes."
Tech: "See my ruler here ... this paper is 9" x 12".
Enduser: (confused) That can't be. I cut it in half."
Tech: "Yes, half of 24" is 12". And you don't cut the other dimension, so that's 9" x 12".
Enduser: (still confused)
Tech: So when you program the tray as 8 1/2" x 11" these little guides here in the finisher automatically adjust to 8 1/2" wide, 1/2" narrower than your 9" paper. So you can do one of two things: 1) you can cut the paper smaller to 8 1/2" x 11", or 2) you can program the tray to a custom paper size 9" x 12". Either one will work.
I hope she wasn't a math teacher. =^..^=
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