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alberto

First layer shifting on the platform

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I am trying to print a big object: with a base around 200mm x 150mm

I sliced it with Netfabb, with a raft (as it's contact surface it's very small) and without support.

I am having the following problem: the raft is currectly printed and occupies almost all of one raft dimension, but when the ultimaker start printing the first layer, it prints the objects outside the raft and the printing envelope (it may be a coincidence, but in the secondo run I noticied that it started printing the object exactly in the center of the platform).

I verified that the endstops are correctly triggered if the printing head reaches the limit and tried to two different alignments of the object on the platform, but each attempt was a failure.

Any hints on the possible cause of this anomaly?

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