What 3D printer...

  1. Screwdriver

    Screwdriver Member

    Messages:
    6,496
    UK London
    what happened?
     
  2. ukracer Forum Supporter

    With my test?
     
  3. Screwdriver

    Screwdriver Member

    Messages:
    6,496
    UK London
    That recent near miss with an asteroid... :dontknow:


    Of course the test!
     
  4. Chris Snow Member

    Messages:
    39
    Location:
    Nottingham
    Pretty good, gone through a few litres of resin now.
    As with all 3d printers it takes a bit of fiddling with parameters but once you figure it out it's fairly reliable.
    The wash and cure kit is a bit expensive for what it is but makes it a lot less messy!
    Not tried thingiverse, I've been making my own models in Fusion 360 then slicing with ChiTuBox (accepts most 3D formats)
    The only thing I haven't worked around in post processing is that XY faces grow by around 0.1mm due to optics, not a big issue though if you are aware.
     
    ukracer likes this.
  5. ukracer Forum Supporter

    Not had time to try it yet mate.
    This Zara piccasso ABS is doing my head I. Taking up so much time.
     
    Screwdriver likes this.
  6. Screwdriver

    Screwdriver Member

    Messages:
    6,496
    UK London
    Ouch! ABS, jumping in at the deep end then...
     
  7. ukracer Forum Supporter

    Not really it's the Braking system on my dads car. ;)
     
    brewdexta likes this.
  8. Bladevane

    Bladevane Member

    Messages:
    755
    Location:
    Harwell, Oxon
    That's the problem with TLAs (three letter acronyms). ABS could mean a number of things.
     
    ukracer likes this.
  9. brewdexta

    brewdexta Forum Supporter

    Messages:
    3,947
    Yorkshire
    I got about 7 hours through a 10 hour print and the spool of PLA jammed and the print failed. The spool was near the end and the filament go trapped down the side of the inside of the spool, could happen any time. So getting the filament detector working properly is now higher on my priority list. Here's the sensor fitted, I may move it later as I may feed the filament from the top not the side now I have a direct drive extruder but it will do until I get the firmware working.

    20200916_102408-01.jpeg

    Inside there is a grooved wheel and a wheel with holes in it that pinch the filament. An IR LED shines through the holes to an optical detector which toggles the signal pin. If the extruder is pushing filament to the hot-end, or trying to, and the signal pin is not being toggled then the filament has either run-out or is jammed. I printed a new back on for it that included a bracket to bolt it the Z axis.

    20200916_102412-01.jpeg

    Here's the current filament path, not ideal but works for now, I'll probably turn the bracket around that holds the spool so it feeds vertically down on the near side of the top rail, I may have to raise it a bit so i can get the filament sensor in.

    20200916_102420-01.jpeg

    I bought the filament detector from the same manufacturer as the new main board so nothing can go wrong, can it ;) The new main board is a BigTreeTech SKR E3 mini v2.0 and I've compiled the latest Marlin firmware using Visual Studio code and PlatformIO for the bare board, then with additional features like the bed leveling probe. However the filament sensor is being a bit of a bitch, and I'm not the only one having issues. There is a socket on the board recommended for it, the E0-Stop which uses pin PC15, I've edited all the correct files after sifting through thousands of comments on github, reddit and the company's own facebook group. No go. There is a PT-DET socket but this is only 2 wire not 3 wire, some people have had success using this by patching 5v in from elsewhere but you need to amend some code as there was a bug in Marlin where pin PC12 was in use by something else for a while on boot so you have to re-initialise it before use. I think there may be a proper fix in Marlin now so may download that before the next attempt. I may also try the manufacturers own branch of Marlin but others are struggling with this too so sounds like the sensor hasn't been tested on the latest board, but i like a challenge.

    Next it is time to check that the sensor works. I've tried the usual G119 g-code commands before and after inverting the logic in the firmware and its not changing state when you move the filament, or cut the filament, at least as far as the printer is concerned. I'm busy on the kitchen still and that takes priority, but I'll check the ground and 5v today and I think I can use the crest feature on my multimeter to check the signal pin being toggled, if not I may buy a Picoscope USB Oscilloscope as it will come in handy, probably the 2205A, I may get one of these anyway as they come in handy and will work with Windoze or Linux.

    While testing I did print out a couple of these, they are the clips that hold the tow hitch socket cover on the back of the Disco 3, I'm always losing or breaking them. As aesthetics are not important underneath a rusty Land Rover I printed it without supports to save time/PLA, a bit of droop on the overhang but worked perfectly.

    20200915_115019-01.jpeg


    Cheers
    Andy
     
    ukracer likes this.
  10. Screwdriver

    Screwdriver Member

    Messages:
    6,496
    UK London

    IKR
     
  11. ukracer Forum Supporter

    IKWYM
     
  12. daedalusminos Member

    Messages:
    951
    Location:
    Norwich
    Since fitting the replacement EinsyRambo control board the MK3s hasn't missed a beat. Some lovely results during shakedown printing in PLA and the generic ABS settings gave good results. IMG_20200919_150545.jpg
     
    Bladevane and brewdexta like this.
  13. Bladevane

    Bladevane Member

    Messages:
    755
    Location:
    Harwell, Oxon
    Excellent. So pleased you got this issue resolved and I can scour the Prusa website longingly knowing it is still a quality product.
     
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  14. armalites Member

    Messages:
    5,223
    Herefordshire
    That's great news. That bearing thing is amazing, we've got a couple kicking about and people are always amazed it's printed as one.
     
    DAPPH likes this.
  15. ukracer Forum Supporter

  16. Screwdriver

    Screwdriver Member

    Messages:
    6,496
    UK London
  17. ukracer Forum Supporter

    Thats what I said. I am trying to find out if the OU counts as education.
     
  18. hooblah Member

    Messages:
    388
    south london
    I have an 'education' account. I just faked the email address lol.
     
    Maker likes this.
  19. armalites Member

    Messages:
    5,223
    Herefordshire
    You can register for a startup business too, no issues
     
    hooblah likes this.
  20. ukracer Forum Supporter

    Told you it was the board. :)
     
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