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Why my ultimaker 2 sounds like it is having a hiccup?

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Posted (edited) · Why my ultimaker 2 sounds like it is having a hiccup?

Hi attached is the video of me trying to do flow rate calibration and seems like the hot end move like it has a hiccup for a moment. What could be the cause of the problem? 


Layer Height .3mm

Initial layer height .8mm

Line width .8mm

Wall thickness 0

Wall line count 1

Top and bottom thickness 0.0 mm

infill 0%

Material flow 100%

Print speed 30mm/s

No retraction enabled 


Attached is the zip file of the video i took . The problem is at around 3s and last second.

Thank you for your advices.



Edited by mnidannydang
video at wrong place
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