Why does ADF scanning dramatically slow down on HP7510?

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Why does ADF scanning dramatically slow down on HP7510?

Hi,

I have a 27" iMAC running Lion and am using the PDFScanner app for capturing scans from my HP Photosmart 7510 multifuction printer. However, I am trying to figure out why scanning slows WAY down after the first hundred or so pages. Here's what happened:

I unpacked my new 7510 and enjoyed a couple hours of scanning and digital filing using the auto document feeder (ADF). The 7510 then started taking about 40 second to scan a single page, no change of settings, would just hang up for 30 seconds with the page half way in the scanner. I thought it was maybe a thermal management issue so I shut it down and let it cool off for an hour. First page out of the gate took that same 40 seconds. I decreased DPI all the way to 100, changed the color to black and white and did everything else I could think of. Scans were fine, just painfully slow.

So I called HP customer support, they suggested I plug the unit straight into a wall because maybe it was starved for power through the UPC. Wierd... but I did it. No help. Here's the kicker: She asked me to take the computer out of the loop entirely and use the ADF to copy a page only. I did, took the same 40ish seconds.

She said there was something probably mechanically wrong with the printer and gave me an RA #. Got it swapped out with a new unit, had another couple of hours of fast, clean scanning (but I went much more slowly this time), and bam, one random page (and every page thereafter) is now back to being 40 or so seconds to scan. It would normally take maybe 5-7 seconds to scan at 300 DPI.

Flatbed scanning does not seem to be effected. So, given that the unit does it when the computer is not being used, this seems like a printer problem... right? Could HP be throttling its users? I sure hope note. Anyone have any ideas?

iMac (27-inch Mid 2011), Mac OS X (10.7.4)

Posted on Jun 3, 2012 12:08 PM

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Answer 1

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Alistair Cullum

Level 1

20 points

Dec 23, 2012 9:29 PM in response to DLaser

I know this is an old post, but in case others end up here looking for a solution.

This is a "feature" of the 7510. Quoting from their support site:

The behavior that you are seeing in your printer is normal in that product, this printer is merely design to home users where their needs are not as high compared to business users. The unit reduces its speed to prevent overheating the motor in the Automatic-Document-Feeder (ADF). So, there is nothing wrong with that behavior and you can still use it even if the speed of scanning or copying through the ADF reduces. I hope this information is helpful.

What this means is that after 75 sheets pass through the ADF, it paues ~20 seconds between scans. It's not clear when or how this resets. It's also apparent that, for whatever reason, their tech support is not always aware of the issue.

There are several threads about this problem at the HP support forums. Here's a major one:

http://h30434.www3.hp.com/t5/Scanning-Faxing-and-Copying/Photosmart-7510-Long-De lay-Between-Scans-from-ADF/td-p/1114139

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