Prusa Z Screw Isolator
by DaleDunn, published
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I don't think it's bandy. The piece fit rather snugly on the smooth rod. The wobble is in the same pattern with or without your mod. It's just that with your mod it isn't as pronounced. This makes me think there is something else wrong with my printer. (it an i2 btw)
You probably have some slop on your smooth rods, or you may be seeing some of the banding I linked to in a G+ discussion in another comment.
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As pointed out by Buserror in the comments, you will need to make sure you have enough room in your X ends for the movements of the screws. I found when assembling my Prusa that the threaded rods themselves are abrasive enough to widen a hole in ABS parts, if used as a file. So, if you don't have enough room for your Z wobbling screws, you can use them to open up the hole. Or you could possibly straighten them enough by hand to avoid interference. Either way, make sure you have enough clearance.
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