Do you know how to grind beef roast meat into ground beef using a food processor?

I am trying to find out how I can grind beef roast meat into ground beef using my food processor. I have looked at my owner’s manual for instructions but there are none and I have had no response back from my email to the manufacturer requesting instructions. Any ideas?

I often buy beef roast on sale and grind in the food processor. It’s not as uniform as a grinder, but it works. I do it often to make chili. Just cut it in large cubes and process a few chunks at a time.

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