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These are the pictures I wanted to post way back in 2012. They show the purge unit from a Canon iP3000 plus a schematic of what it does. The rubber cups cover the nozzles in the printhead. Suction is enabled when the cams move the levers to block the air inlets at the left of the drawing.

There was a big mess at the back of the drawer where I keep my ink. This set of five bottles had all failed in the identical way. They were 5 or 6 years old and hadn't been overtightened. The caps all just cracked around the top and released the contents. Contrary to my caption I don't think...

Thanks for the very useful suggestions. I think I have now fixed this (fingers crossed) and have learned a lot more about how things work in the process. The problem was that the plugs in the filling holes of the cartridges were not sealing properly. I now know that if the filling hole is left...

I was given this printer which was used briefly then stored for a few months. I fitted a new set of auto-reset cartridges and cleared some blocked nozzles. It now gives a perfect nozzle check and prints really well apart from one thing. It drops big blobs of ink randomly on the paper. I can't...

Thanks, turbguy. On the iP3000 I think it would be impossible to dismantle the purge unit without removing it from the printer first. Your mileage may vary. However you could clean it by squirting water or cleaning fluid into the various ports and rotating it by hand. I'm still waiting to post...

I just wanted to share some pictures of the purge unit from my ip3000. I've learned a lot of useful stuff on this forum and maybe posting this information will help someone else. For those that don't know, the purge unit is a vacuum pump that sucks ink through the printhead to keep it clear of...