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==Ends don't meet in plots==
 
==Ends don't meet in plots==
 
When the ends of figures do not line up, this strongly suggests an alignment or slippage problem.  To check the alignment, rotate your egg with the motors disengaged and see if there is any perceptible wobble.  It's important that the egg be well centered in the egg cups, otherwise, the egg may precess as it is rotated.  Sometimes it helps to lift the Eggbot up and sight down the long axis of the egg as you turn it.  As regards slippage, the egg needs to be held tightly by the tailstock spring.  That spring should be compressed around two-thirds or more (but not fully compressed).  See [[Improving precision|improving precision]] for many more tips on alignment and other factors which will influence the quality of your plots.
 
When the ends of figures do not line up, this strongly suggests an alignment or slippage problem.  To check the alignment, rotate your egg with the motors disengaged and see if there is any perceptible wobble.  It's important that the egg be well centered in the egg cups, otherwise, the egg may precess as it is rotated.  Sometimes it helps to lift the Eggbot up and sight down the long axis of the egg as you turn it.  As regards slippage, the egg needs to be held tightly by the tailstock spring.  That spring should be compressed around two-thirds or more (but not fully compressed).  See [[Improving precision|improving precision]] for many more tips on alignment and other factors which will influence the quality of your plots.
It can also be the case that ends of closed figures will not meet if something is '''mechanically loose'''.  Everything on the pen arm should feel rigid, with the exception of the hinge.  If not, check each screw to make sure that it's tight. To learn about what specific outcome certain loose screws have on drawings click [http://wiki.evilmadscientist.com/Eggbot_Quality_Troubleshooting#Loose_Eggs_.26_Screws here]
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:It can also be the case that ends of closed figures will not meet if something is '''mechanically loose'''.  Everything on the pen arm should feel rigid, with the exception of the hinge.  If not, check each screw to make sure that it's tight. To learn about what specific outcome certain loose screws have on drawings click [http://wiki.evilmadscientist.com/Eggbot_Quality_Troubleshooting#Loose_Eggs_.26_Screws here]
  
  

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