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Troubleshooting a Frozen Far Roller on a Marcato Atlas 150 Pasta Machine
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[QUOTE="andrewkirk, post: 6482155, member: 265790"] This is a not very physics-related question, but I suppose fixing mechanical things involves a bit of physics, so I thought I might as well ask here. I have a Marcato Atlas 150 pasta machine that has stopped working. The crank won't turn because the rollers won't turn. The crank directly drives the near roller, which drives the far roller by interconnecting cogs. The gap between the near and far roller can be modified by turning a dial knob which changes the location of the far roller. To turn that dial you first have to pull it slightly away from the machine's case so it clears a locking nub and becomes free to turn. When you release the dial, it settles with a hole in the dial over the locking nub so that it cannot turn. A metal rod goes through the centre of the far roller and through the centre of the dial, with a squared cross-section where it goes through the dial so that the dial and rod cannot rotate relative to one another. The picture below shows the rollers of the machine, the "far roller" on the left. You can see how the rod is offset from the axis of the roller. Turning the dial (and hence the rod) changes the inter-roller gap by the part of the rod that locks to the dial, and also the part of the rod that attaches to the machine casing at the other end of the far roller from the dial, being off-centre from the axis of the roller. So rotating the dial and the rod moves the far roller axis in a small circle, thereby changing the gap between it and the near roller, whose axis is fixed. So far as I can tell, my rollers won't turn because the far roller won't turn relative to the metal rod that goes through it. Since the crank locks to the near roller, which locks to its cog, which locks to the far roller's cog, which locks to the far roller, which locks to the metal rod, which locks to the dial, which locks to the machine casing, the crank won't turn. The only explanation I can think of for how it is supposed to work is that the far roller is supposed to be free to turn around the metal rod that goes through it - ie that that rod serves as an axle for that roller. And mine is frozen. I've sprayed it with WD40 over several days but still can't get it to turn. Now to my question - to anybody that has experience with Atlas, or indeed any, pasta machines, or that is just good at solving mechanical problems: Am I correct that the far roller is supposed to freely turn around the metal rod? If so, any suggestions about how to unfreeze it? If not - what am I missing? How is the far roller supposed to be able to turn when the dial is locked to the nub on the casing? Thank you Andrew [MEDIA=imgur]a/xjSgFmN[/MEDIA] [/QUOTE]
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Troubleshooting a Frozen Far Roller on a Marcato Atlas 150 Pasta Machine
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