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Why the boqden length it's 67cm?

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It's more or less the distance between the material feeder and the printhead when it's at the front right of the machine. Since you can't print without tube on the Ultimaker2, you need to have a tube about that long. The other solution is not to put anything on the very front right of the boardplate.


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Well I was wondering if it was a math of filament mm + tension + distance to far corner. Specially since on UMO+ (the one I have) and on UM2 models it's the same distance. The number really doesn't seems random at all. Since I have changed my UMO+ to work with 1.75mm I was wondering if the 67cm wasn't the best idea for a thinner filament.

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