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Material flow problem for my UM2 at 1,75mm

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Hi guys!20160919_112944.thumb.jpg.00961ca9cdf4758b398e616bd19c2d30.jpg

Continuing to make printing tests, problems still arise under-extrusion despite having changed the ESTEP adequately.

What it is known that there is always a little material that flows, should push more wire in the extruder so that there is this lack of material during the printing steps.

Can anyone help me solve!


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