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  1. Replies
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    Been a while since last update on Dollo builds....

    Been a while since last update on Dollo builds. Progress has been slow, but there's progress.
    For the Dollo rebuild and Dollo.2 I did some cable management, actually had a failed print due to loose...
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    MKS Sbase is a nice board and Smoothieware seems...

    MKS Sbase is a nice board and Smoothieware seems to work fine. However, Smoothie lacks one feature that I consider a must with Dollo: mesh bed leveling i.e. the manual leveling. Smoothie only...
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    Mounted the bed properly, added part cooling fan...

    Mounted the bed properly, added part cooling fan and wired them properly. After leveling the bed and a couple of test prints I got this benchy printed:

    128261282712828

    Looking quite good.
    ...
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    Sadly the Kickstarter wasn't successful. But I...

    Sadly the Kickstarter wasn't successful. But I guess it was inevitable, Dollo isn't the best option commercially... rather a

    So the Dollo rebuild: I took a 360W 12V PSU from my Tronxy X5S (going...
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    Yeah with systems that have multiple nozzles the...

    Yeah with systems that have multiple nozzles the purge is optional, but I think I'd use one just to make sure the filament in the nozzle is "fresh" when selecting new nozzle to print with, especially...
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    Yes, new filament pushes the old out. Some...

    Yes, new filament pushes the old out. Some filaments purge quite cleanly with quite small amount of new filament, some colors might require a quite long purge, like when printing black and white...
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    Purge tower or waste tower is a additional...

    Purge tower or waste tower is a additional printed structure for holding the waste that happens when changing the filament. There's going to be some wasted material when changing the filament because...
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    If the 2 into 1 setup is not a mixing hotend, but...

    If the 2 into 1 setup is not a mixing hotend, but a hotend and separate joiner part, printing materials with different temperatures is possible, the temperature change just needs to be done during...
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    Got the motor wires cut to proper length and made...

    Got the motor wires cut to proper length and made connection boxes for the Z and Y wires. To boxes connect the two motors in series and are mounted on the frame.

    12738 12739 12740

    Also...
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    Mounted the Sbase on the frame and tried Z-axis...

    Mounted the Sbase on the frame and tried Z-axis motor and Z endstop. Working fine, however I need to wire Z-motors in series so the movement is smooth on slow speeds. See:...
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    All axes are now assembled. I took some extra...

    All axes are now assembled. I took some extra time with X and Y mounts, now the motor is positioned very tightly towards the rack. Even so that the movement feels quite rough when the gear moves on...
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    X and Y racks printed and assembled. Yellow REAL...

    X and Y racks printed and assembled. Yellow REAL PETG, printed with Prusa MK2.5. Turned out quite nice.
    12673 12672

    Started assembling Z-axis.

    1267412675
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    Ain't got time to make any plans... but here are...

    Ain't got time to make any plans... but here are models: https://github.com/spegelius/Dollo
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    Installed the z-rails, sliders and bed carriage....

    Installed the z-rails, sliders and bed carriage. Carriage moves about somewhat sluggishly but the slides take bit time to wear in, after that they work fine:

    12627 12628 1262912630

    Started...
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    Received some filament and printed lots of parts...

    Received some filament and printed lots of parts in addition to previously printed parts so that the Dollo rebuild can continue. Some of the extensios were quite brittle and I had to scrap them. I...
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    Found the actual reason why MK2Dollo made that...

    Found the actual reason why MK2Dollo made that artifact on the Nefertiti bust: the bed carriage was bumping on the ziptie that holds the smooth rod in place. Not sure why, might be that I've slightly...
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    Now that both Dollo3D.2 and MK2Dollo are more or...

    Now that both Dollo3D.2 and MK2Dollo are more or less finished products, I can finally star working on the first Dollo expansion. Step 1, take it apart:
    125311253212533

    Step 2 is to sort out what...
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    Finally got the heated bed installed on...

    Finally got the heated bed installed on Dollo3D.2. It's a MK2B from Aliexpress, not the best option, but with a glass on top of it good enough. Added some insulation to the underside of the bed so it...
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    Changed the filament feed mid print and no more...

    Changed the filament feed mid print and no more chafing. I normally use that kind of spool container for all printers, but was lazy. Lesson to be learned: don't be lazy.

    12489

    Print finished...
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    Wanted to test how MK2Dollo handles a tall print...

    Wanted to test how MK2Dollo handles a tall print and started, admittedly bit optimistically a 24h 23cm tall Nefertiti print. Progress after 13 hours of printing:

    12473

    You'll probably notice a...
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    So here's whats happened with Prusadollo: - the...

    So here's whats happened with Prusadollo:
    - the original 240W PSU started acting up, I had lowered the voltage to ~12.3V and now PSU cannot keep the voltage stable during load. So the overvolting...
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    Got the frame stabilization done for the Dollo.2...

    Got the frame stabilization done for the Dollo.2 build. It's quite rigid now. Printing all the screws, beams and center parts took quite a lot of time and material, so not sure if it's worth to do...
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    Actually it seems Prusa didn't mess with PSUs,...

    Actually it seems Prusa didn't mess with PSUs, they upgraded the heater cartridge to a more powerful. I remembered watching a clip about it in youtube, the PSU 14V mod was Tom's doing:...
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    I adjusted the PSU to 14V because that's what...

    I adjusted the PSU to 14V because that's what Prusa did with MK2 when it was launched and it was suffering from temp faults when using the part cooling fan. Their fix was to tune the PSU to 14V. I...
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    That output is from the actual firmware which I...

    That output is from the actual firmware which I think doesn't know or care about bootloader. Can't remember if the boards with a bootloader print anything else during boot...
    Haven't had any...
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