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Manual Leveling, can't lower bed any further. Printhead still too close to bed.


Ferryy
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Posted (edited) · Manual Leveling, can't lower bed any further. Printhead still too close to bed.

The Ultimaker 2+ Connect unfortunately doesn't have active bed leveling. When I was performing the build-in manual leveling procedure, I ran into issues with the front-right screw. It was impossible to lower the buildplate further since the screw is tightened all the way. Hence printing the first layer goes poorly due to the small space on this side of the bed.

 

I suspect that I have to adjust the small Z-Limit screw (to lower the complete buildplate) which is in the back under the buildplate, but I couldn't find any instructions on how to do this. How can I open up the white cover on the back without breaking anything?

Edited by Ferryy
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    • Ferryy changed the title to Manual Leveling, can't lower bed any further. Printhead still too close to bed.
    Posted · Manual Leveling, can't lower bed any further. Printhead still too close to bed.

    I think it is enough when you slightly bend the end switch in the bottom back to "adjust" the end stop of Z.

    So when you are too high you need to lower the bed, so bend the switch down just a little bit.

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    Posted · Manual Leveling, can't lower bed any further. Printhead still too close to bed.

    Today I have opened the box of a brand new Ulitmaker 2+ Connect. I am experience the same issue "manual leveling, can't lowe bed any further. Printhead still too close to bed."

     

    The Printhead bows the glass buildplate both on the left and right front side. You hear the nozzle touching the bed. The Z-Limit screws are not 'long/short' enough to perform the job. 

     

    The proposed solution is not clear for me. Can you eloborate furhter?

     

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    Posted · Manual Leveling, can't lower bed any further. Printhead still too close to bed.

    At my UM2+Connect the distance from the top surface of the aluminum tray to the top surface of the glas is quite exactly 20,0mm when the bed is levelled.  The adjusting screws are dragging the builplate down against the force of the spring. Between the aluminum tray and the adjusting screw there is a washer. If this is missing, perhaps the travel of the screw is to short to lower the buildplate low enough. At my printhead the distance from the nozzle tip to the bottom side of the lower aluminum plate, where the hot end is mounted, is 18mm. Perhaps the nozzle is not all the way in.

     

    On the bottom side of the aluminum tray between the z-spindle and the left guiding rod there is a screw pointing downwards which is switching the limit switch in the bottom of the printer. If you bend the lever of the limit switch slightly down, the home position of the whole tray will be slightly lower. Perhaps this will give you the fraction of a mm which is missing. If you only have the problem at the front screws, perhaps the tray is bent? Adding washers at the front adjusting screws probably will help.

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