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Ultimaker 2 with Extrusion upgrade kit

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Hi all

3 weeks ago I upgraded my UM2 to UM2+ with the extrusion upgrade kit.....and now I am seeing lots of under extrusions whilst printing.

This is quite frustrating as my UM2 I had no issues once I swapped to Roberts feeder.

I have done multiple atomic pulls and they are all clean.

All the fans are working on the new head.

I have tightened all the screws on the new feeder.

I have used the same PLA (faberdasery PLA) that I previously used.

Any other suggestions would really be appreciated!

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First thing comes to mind, check that the feeder plate/gears are perfectly aligned. Second idea, check that the bowden tube is all the way inside the tfm coupler. Third idea, makes photos of your setup it might give us a hint of what could be giving trouble. Fourth idea check the feeder tension indicator is at least 'on the middle'.

Lets see if we can debug your problem. Photos always help, even from the prints.

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