RJ-900 making high pitch noise when feeding paper

[momentmfg]

Hey All,

I have a Mutoh RJ-900 which just started making an extremely loud high pitch squeal when the printer first feeds the paper in and out to analyze its width and leading edge.

I took the left cover off and it doesn't sound like its coming from the drive train area.

The noise is really loud and sounds like its metal on metal.

Also, the noise does not occur during normal slow speed outward feeding when printing.

Any ideas on what it could be?

Thanks!