electric knife sharpeners

I bought a Chef’s Choice knife sharpener at a garage sale. It was a discontinued cheaper model. It only sharpens as good as I do with a stone (in other words, poorly). Did I just get a bad sharpener? Any other suggestions? Do not suggest a stone or one of those wand sharpeners and the food TV chefs recommend. They don’t work for me. I will not spend another cent on them. I have bad vision and apparently can’t get the angle right, so I need automation of some kind. Please help! When I move, I won’t have anybody to sharpen for me!!