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Ultimaker Community of 3D Printing Experts


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  1. Hi, I have had a LOT more success with the UM2 using 1.75 mm than the 3 mm. I inserted a small 2mm ptfe tube bought on e-bay within the existing 3mm all the way and tighly to the hot head and at the extruder I put a small washer which prevents the smaller tube going back into the extruder. All I can say this printer has never worked better, no more extruder noises, clicks, slips and extruder inconsistencies, a dream come true as I have already got a reprappro Ormerod that works on 1.75mm. Minor changes to UM2 was changing it to use Custom filament 1.75mm under settings and use 95% flow, yours
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