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Another printer (it is a disease, once you start collecting them...)

Discussion in 'Projects' started by mark tomlinson, Oct 28, 2016.

  1. Geof

    Geof Volunteer Moderator
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    lol make sure you have the lady send us a picture when your on the floor and that delta is standing on top of you! JK! :D
     
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  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Proof that the effector electronics and thermistor on hotend are working:


    20161214_125434.jpg 20161214_125430.jpg 20161214_125427.jpg 20161214_125420.jpg
     
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  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    So, a followup.
    We Did the conversion of one complete effector from the HE2xx that SeeMeCNC makes to an E3D.
    We added heat sinks on all of the motors and a small fan above the extruder stepper*.
    We increased the stepper drive current* to assist it in being able to actually push the filament into the extruder via the bowden.

    The most recent problem was that the extruder stepper was running hot then I remembered we had the factory one dead out of the box (and naturally it was the one with the heatsinks) so the replacement had none. Added those back on and cut a hole for a vent fan directly above the extruder stepper.

    Most of the steppers have a single heatsink on the back side (one photo included for an example) The extruder one has two, one on the back and one on the side



    20170113_170307.jpg
    This is the E3D'ed effector, top view

    20170113_170322.jpg
    Effector bottom view (even Tom Baker seems impressed, Mal -- not so much)

    20170113_170418.jpg
    One of the X/Y/Z steppers for comparison

    20170113_170434.jpg
    The extruder stepper and hole for fan

    A 12v fan tied to P/S and on/off switch (so it runs always) is directly above that hole. Adds no real noise and does move some air.
     

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  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    A little more z-axis offset of the Global G-Code Offsets section was needed to dial it in all the way.
     
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  5. Geof

    Geof Volunteer Moderator
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    Pictures of that sweet ass delta prints ! Super glad to see she's up and cookin! Congrats!
     
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Well, before the heat sinks and fan went on the extruder stepper it would have been sweet half-ass delta prints since the stepper would get hot and pretty much stop extruding half-way through a print :)

    I'll get it back fired up this weekend and crank out some proof-of-life.

    This should be the last thing needed (after having to learn repetier firmware and deltas and OctoPrint).
     
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  7. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    We shall see....

    Printing.jpg
     
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  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    and yes, benchy is deliberately printing very slow.
     
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  10. Geof

    Geof Volunteer Moderator
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    Delta voodoo!!!!! Love to see it printing !
     
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Still going...

    Printing.jpg
     
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    There are some obvious tuning issues on the benchy that I can see so far, but hey ... I can deal with that.
     
  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    So Yay! First full print finished.

    And for those who complain about cost and time-to-get-a-print bear in mind that this one we bought at the MakerFaire Oct 22, 2016
    for $1050 (plus another $200 in spare/replacement/additional parts)...including an entirely new replacement effector that SeeMeCNC set us when troubleshooting issues (hint: not the problem) an entire replacement set of stepper motors (one died during installation -- we funded those) and an E3D hotend with extra bits to convert one of the effectors (probably not the problem either, but I like it better). And then had to build it :) since that was kit form.

    These appear to have sorted the extruder stepper: https://www.amazon.com/gp/product/B01HSBM72W/ (well, them and some fans: https://www.amazon.com/2packs-0-15A-Brushless-Cooling-AB4010M12/dp/B01CZFUOD0) so that it no longer overheats. Some of that is on me since we jacked up the stepper current a lot to get it to overcome the back pressure in the extrusion path (long bowden tube). Could we have gone with less current? Probably, but with the extra cooling it is fine and I was tired of dealing with it. I wish their support had been more helpful as we went along, but <shrug> there you have it.

    After all of that ... this is the FIRST print that can count as successfully completed. The best it managed before was 75% of a vase...everything was downhill after that.

    Granted I need to go through and tweak a number of things that you can see as 'issues' with the way benchy printed (it ain't real pretty) but those are fairly straightforward things to do and the printer stayed up printing the entire time without any mechanical or electrical issues so -- win. No jams...

    After addressing the tuning problems with benchy (one example is that it clearly printed too hot) we will speed it back up to normal (at least 100 mm/sec, the older v2 was only 60) and see about a 3 foot tall vase.

    Patience indeed :)



    brnvhy.jpg
     
    #113 mark tomlinson, Jan 14, 2017
    Last edited: Jan 14, 2017
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  14. Geof

    Geof Volunteer Moderator
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    YOU BEAT THE DELTA!!!!

    Awesome job man!
     
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  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Just started a long-haul (>1 day) print of a 2 foot tall vase (max is 3 foot) and cranked the temps down and the speeds up.

    We will see how that turns out. The exhaust air from the fan over the extruder stepper fins got warm-ish (85 maybe) but never hot.
     
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  16. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It was running at almost 50% underspeed overall before and now at just about a 10% underspeed (90 mm/sec rather than 100).
     
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  17. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Also we use the WolfBite Nano* on the print bed. It works really well.It also requires heat to activate so when the bed cools it will 'let go'



    *or as I call it "liquid essence of dog poop stench" because man --- it reeks
     
    #117 mark tomlinson, Jan 14, 2017
    Last edited: Jan 14, 2017
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  18. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Rotated.jpg
     

    Attached Files:

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  19. Geof

    Geof Volunteer Moderator
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    Hahahhahaahahaha!!! Its huge ! Well done !
     
  20. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Only thing I forgot was the ending GCode for Simplify.
    Unlike Cartesian printers a HOME ALL is needed at the end to move the nozzle away from the print.
     
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