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Type: Posts; User: spegelius

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  1. Replies
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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:

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    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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    Hmm, I don't think that's the problem, I have...

    Hmm, I don't think that's the problem, I have multiple boards that use either 250000 or 115200 bauds and Arduino programs the fine, no need to change baudrates. I'd check the board for bootloader; if...
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    Finally got the damn thing printing. Took some...

    Finally got the damn thing printing. Took some effort, electronics was really the thing that caused some problems:
    - as mentioned previously, fet was blown due to bed drawing too much juice. The bed...
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    Got things wired up for some testing. Everything...

    Got things wired up for some testing. Everything seems to work after fixing few things in FW, like steps for 0.9 degree motors, z-height and display button rotation direction.
    Went through the Prusa...
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    Got the PSU cover redesigned and printed for...

    Got the PSU cover redesigned and printed for bigger PSU (not wattage, but physical size). Mount and wiring also done. PSU seems to work, adjusted it to 14V for little extra performance.
    ...
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    Most boards have some extra AUX pins that can be...

    Most boards have some extra AUX pins that can be used for stuff like controlling servos, relays what ever. Also pins normally used for display and sd-card reader can be used for different things, you...
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    I've had RAMPS go up in same fashion, screen...

    I've had RAMPS go up in same fashion, screen flicker and smoke. Result was a blown 5V regulator on Arduino Mega, board still works when using USB. The reason for that was me connecting endstop...
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    To change baud rate, I'm afraid you'll need to...

    To change baud rate, I'm afraid you'll need to recompile Marlin. I'd upgrade to newest version while doing that. I've had some problems with longer USB cables and 250000 br, but with short cables...
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    Nice, looking at your build makes me think I...

    Nice, looking at your build makes me think I could have gone a bit different way like the corners and rod holders. Have you got it running yet?

    All files are here:...
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    Received some stuff I ordered from Aliexpress...

    Received some stuff I ordered from Aliexpress (stepper motors) and decided to do some assembly on PrusaDollo. Got the Y-axis, X-axis, Z-axis and LCD mount mostly done. Bed carriage moves properly on...
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    Prusadollo progress: as I don't have the original...

    Prusadollo progress: as I don't have the original aluminum bed carriage, I designed printable version based on the original. Of course it should be quite stiff so I printed it with ColorFabb XT-CF20...
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    Well the original Dollo design and extrusions are...

    Well the original Dollo design and extrusions are by @benengel94, I've just gotten into this hobby of trying to make good enough 3D printed 3D printer :). The z-screw idea has been forming in my mind...
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    Reprinted the vase and benchy after changing the...

    Reprinted the vase and benchy after changing the stepper driver. Results do seem bit smoother, although the material is different color and brand PLA.

    Had a look at Aliexpress, tl smoothers that...
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    Ok two things: - the blue filament is not PLA,...

    Ok two things:
    - the blue filament is not PLA, its PETG :rolleyes:. Explains why it didn't bond to the white... note to self, next time actually check the filament instead of 'remembering' where I...
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