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Does anyone notice that when they upgrade from an MK8Makerbot(?) to a E3D V6 hotend that when using the same settings and bed-leveling/z-distance-setting procedures, that the filament is much more likely to be pulled up and bunch up around the nozzle while printing the first layer?

It occurs mostly when printing small details, such as 3 mm bolt holes, and not so much when laying down long lines.

Is this due to the shape of the nozzle, which on the V6 is much more flat when compared to the MK8 which is more sharp, or is it due to something else that can be easily fixed?

e3d nozzle mk8 nozzle

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  • $\begingroup$ what kind or Mk8? Mk8 is a way to show that this is itteration 8 of some hotend. Who's manufacturer? which design? On which printer? $\endgroup$
    – Trish
    Jan 1, 2019 at 21:10
  • $\begingroup$ It seems there are unspoken rules that you are supposed to follow when switching to an e3d v6 or other all metal hotend. People say to increase the temperature 10-30 degrees and the bed temp as well. I dont see how this should matter if both thermistors are accurate. All I know is after installing the V6 and keeping everything else the same, the filament is much more likely to get pulled up and stick to the nozzle! $\endgroup$
    – cds333
    Jan 3, 2019 at 22:21
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    $\begingroup$ @Trish good points, I thought the same thing; but I don't think that's how it works. Everyone simply calls them "MK8". Search Amazon for "MK8 nozzle" and you will get this specific shape of nozzle and a specific thread type $\endgroup$
    – cds333
    Jan 4, 2019 at 22:26

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Turns out this can be fixed by increasing the bed temp to 65-70 °C and of course increasing the extruder temp by 30 °C or so, which is standard for the all metal hotends (no idea why)

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  • $\begingroup$ Have you measured the temperature of the two hot ends with an actual thermometer or are you just going off the print settings? The thermistors used to measure temperature can have wide tolerances and your V6 might actually be running colder than your original hot end with the same settings. Plus, is your V6 a real E3D or a clone? All-metal hot-ends have much stricter machining/material requirements for the internal throat and heat-break than the ones using a ptfe liner, and some of the cheaper V6 clones have inferior thermal characteristics compared to the E3D originals. $\endgroup$ Jul 6, 2020 at 12:26

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