I'm having some difficulties with frequent multifeeds on a MFA dual OHCF... I'm kind of at a loss because the feed mechanisms on these trays seem like they should be really robust, but it can't continuously feed for more than a few minutes before multifeeding. The paper I am using is Hammermill Laser Print 32# (105gsm). It does the same out of Tray 7.
Steps so far:
1) Cleaned the existing rollers. (They looked good, but I cleaned the feed, the reverse and the nudge roller same as I always clean rollers.)
2) Put brand new rollers in for all three positions.
3) Adjusted the reverse roller pressure spring to try all three positions with not much difference.
4) Completely replaced the entire feed assembly with a reported good one.
All that is left is the paper itself, right? The annoying thing is that it feeds A-OK out of the internal trays (on a 700i, which uses roughly the same feed head design) and it feeds flawlessly on the internal trays of a 570 (which uses a much lower-cost cheaper feed head design). It seems bizarre that this workhorse feeder is so unreliable with the same paper that all the other trays are fine with.
Luckily, the 700i's multifeed sensor catches it perfectly every time and stops printing, so I'm not outputting multifeeds without even knowing it.
There are several roller kits for these feeders, I am certain I am using the correct one.
Is there a way, an NVM, to turn the tray air blowers on for ALL paper weights, not just heavier weights? Maybe they would help separate it.
Thanks!
Bookmarks