My delight magnifica is now grinding too much coffee causing lots of excess falling into machine. How to I adjust the grinding time?

I had this same problem and discussed it with DeLonghi customer service. My machine was grinding 20 seconds for a double shot and ground coffee was coming out of the top and spilling over inside what a mess! DeLonghi thought it was potentially a problem with the control board - grinding time too long - which is an expensive repair. I also called the local factory-authorized service and described the same problem. They asked what kind of beans I was using and I answered Starbucks espresso. They said that Starbucks is too oily, clogs the machine, and that I should try beans that are lighter. I also checked with an engineer who used to work at Starbucks and he made the same guess. I tried an Italian roast espresso from a local market and it worked! I've had no problems since. The new beans cleaned out the oils and I'm getting great shots. This is a good machine, but is best making single shots.

Thank you so much for everyone's posts. We have two Delonghi Magnifica's and the newest one was not acting like Maggie#1 at our 2nd home. CostCo is always switching their products, so when they discontinued the Sumatra we were buying, we switched to the San Francisco Dark Roast. Maggie #2 was grinding forever, and lots of grounds kept winding up in the tray. SOS (stuck on stoopid--Fixya won't let me spell it correctly), I thought the oily beans were "quality" until I started doing some much needed research as a result of reading these posts. I immediately took the "oily" San Francisco beans out of Maggie#2 and went to the store a purchased some medium roast beans. After two days, the overflow stopped and she is grinding properly. Also, the strangest thing is that I was drinking several cups of coffee every day and nothing was affecting me. I've been drinking coffee for years like that and I didn't think anything of it. The past two days, I have been wired after just two cups (I use mugs, of course). I simply didn't realize that oily coffee was not the best (SOS again!). So thanks again! It really helped a lot!