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I use BuildTak on my UM2+ and love it.  Is it possible to use BuildTak on the UM3?  I wonder if it would interfere with the new capacitive leveling function.  It would seem like adding an extra couple of mm wouldn't make a difference with a capacitive sensor, but I wonder if Ultimaker can answer this officially.

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I tested it with my UM3 and it works, but there's an issue when doing the active leveling, as the nozzles would dig into the bed and melt the BuildTak. But I found a solution:

Flip the build plate around when doing the active leveling. Then, after it's done, flip it again. The thickness is the same either way, so it works great.

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Shouldn't be a problem. And as a backup you always have the option to level manually and disable automatic levelling.

 

Have bad experience with disabling automatic leveling.

I have set it to never - did manual leveling (actually did it several times after having problems) and could not get a good print out of the machine (bad adhesion to the build plate) - did once an automatic leveling after the manual one and everthing works fine. I think the firmware keeps track of the results of previous automatic leveling and uses them afterwards even if you disable it.

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Have bad experience with disabling automatic leveling.

I have set it to never - did manual leveling (actually did it several times after having problems) and could not get a good print out of the machine (bad adhesion to the build plate) - did once an automatic leveling after the manual one and everthing works fine. I think the firmware keeps track of the results of previous automatic leveling and uses them afterwards even if you disable it.

I've had the exact opposite experience. Auto-levelling has failed for me many times on a few different printers (printing waaay too close, as in, pushing the bed down with the nozzle close). The last three prints I've done have been with one manual level and then disabling the auto. Those prints have worked fine.

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had a chat with Daid today;

if you add the buildtak, you should be good.. please note that the hot end does push a little into the material, and buildtak does not like that..

the flexplate system is something else.. the automatic leveling system uses the aluminium plate, and thanks to the buildtak flexplate system that does not work anymore.. so be carefull

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