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jonhollander

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Posts posted by jonhollander

    Easier bed leveling?

    in Third party products & modifications

    Posted

    I switched to this 3 point leveling mod and it works great, even with the stock acrylic platform. It only took me a few minutes to install the mod once I printed and bought all the parts. Highly recommended.

    Now I'm building a heated glass bed add-on.

     

    Hi,

    I know that bed leveling is one of the key variables that have to be absolutely spot on in order to achieve good adhesion and good prints in general. The stock bed leveling mechanism is quite painful with the screws always beeing hard to reach.

    I have tried this thing:

    http://www.thingiverse.com/thing:106576

    ... but the whole bed is not stable if the screw holes for the long screws aren't tight. But if they are tight, the springs can not push hard enough and so the bed does not react to slight turns of the thumbwheels.

    Which leads my to my question. Aren't there any other things to try for bed leveling? I mean something simple that doesn't involve a depth gauge or other weird tech like sharks with frickin lasers :)

    It strikes me odd that something that suposedly every Ultimaker user does at least once every 1-2 prints, isnt implemented better by default. Right now while leveling while the nozzle is hot, I have the problem that it oozes a little bit. This makes it hard to judge the "drag resistance" when using a sheet of paper between the nozzle and the bed.

    Also, if you mind another question. What is with so many adapters for the Z-endstop at the top? Why do so many people worry about this thing? I set it once and never changed it again. The distance between the nozzle and the bed will always be adjusted with the four screws on the bed and compensated by the springs around them. Why is there so much mambo jumbo about the z-endstop?

    Thanks.

     

    Upgrade idea: Exit the Arduino, insert BeagleBone?

    in Third party products & modifications

    Posted

    I think Marlin is good enough for now, but it may be challenging to add new features and sensors, such as like closed loop control, non-linear accelerations, filament flow rate sensing, and capacitive z-height sensing.

    I was looking at the TI Stellaris and other low-cost ARM processors as a platform for some CNC/motion control projects of my own. I'm intrigued by QP is one framework that seems to run on everything from Arduinos and ARMs to Linux and even Android and is free under GPL. It seems like a very elegant architecture to implement complicated real-time embedded applications.

    Anyone else looked at this or anything similar?

     

    US Source for M3 studding - long bolts

    in Coffee corner

    Posted

    One of the long M3 studding bolts in my kit came with a stripped thread. This is one of the four long thumb screws that are used to clamp the top and bottom plates of the extruder box together.

    Does anyone know of a US source for a replacement part? Would a simple M3 threaded rod with nuts on both ends work as a replacement? I'd hate to have to wait a week to have a single bolt shipped from the EU.

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