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Hardware Thread, Primary School 3D printer in Technical; I was referring to the community shape generator. Some Primary schools do not se the software as it is a ...
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    GoPrint3D's Avatar
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    I was referring to the community shape generator. Some Primary schools do not se the software as it is a community element and I do not believe it is regulated although the package is owned by Autodesk, others are quite happy using it and have generic log in addresses for pupils . It is a really good entry level piece of CAD software.

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    SimpleSi's Avatar
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    @plexer
    Mr Makerbot says it won't work without one (and I tried it) - and like I say - it came out looking like a ST transporter accident

    THis is a plug n play 3D printer that does what it does and doesn't do what it doesn't do

    Simon

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    @GoPrint3D
    Got you

    I don't even allow pupils to go on Scratch forum in school so will just ignore that part of it

    Simon

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    Quote Originally Posted by SimpleSi View Post
    @plexer
    Mr Makerbot says it won't work without one (and I tried it) - and like I say - it came out looking like a ST transporter accident

    Simon
    Yuck in that case as always having to print with a raft is a pain, I don't believe it has a heated bed the specs say an injection moulded acrylic print surface I'd try a good coating of hairspray on it personally.

    Ben

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    SimpleSi's Avatar
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    I'm not using my expensive hairspray...

    I mean - I'll have to see if I can borrow some from my wife

    Simon

    - - - Updated - - -

    Firmware version 1.2 (from 1.1) just became available so I'm installing it

    Simon

  6. #51

    plexer's Avatar
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    I got a 26p can of tesco value lasts ages allthough I was using it on heated glass bed as well.

    Ben

  7. #52

    SimpleSi's Avatar
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    I'm reluctant to try printing direct onto the plastic tray but I'll try spraying onto the blue masking tape that comes with it and try again today

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    tried using hairspray and no raft - made no diff - 1st layer didn't stick and just moved around with printhead

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    What temp is it printing at?

    Ben

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    SimpleSi's Avatar
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    Its set for 230C

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    SimpleSi's Avatar
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    Actually it might be 215C - the main monitor implies that but the profile file seems to say 230C

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    Well just going backwards
    Spraying with hairspray didn't make it possible to print raftless and now even raft models don't stick.

    The nozzle drips plastic so in 40% of cases I end up with a little ball of plastic in the middle or the model that then hardens and then the nozzle hits it on subsequent passes.

    My experience has been quite disappointing and I'm close to the stage of sending it back as it doesn't actually work reliably enough

    Simon

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    Proving the point perhaps that there is no such thing as a cheap plug and play extrusion 3d printer - there is just too much to go wrong.

    230 or even 215 sounds too hot for PLA, normally around 180 is generally recommended (I print first layer @ 200 and then drop to 180/190 depending on teh piece). That said, there is often quite a difference between the temp at the thermistor bead and the actual lower chamber where the PLA melts, so don't pay too much attention to the absolute reading. Dripping/ooze is a sign that temp is too high.

    If hairspray didn't work just remove the blue tape and reapply a fresh layer. You need to do that every so often anyway - it wears out. I found printing onto tape was OK but only for smaller pieces. Larger ones warp and the corners start to lift.

    Persevere - you will get there, it's just not simple or easy.

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    plexer's Avatar
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    Indeed these things are not plug and play no matter what one you get which is why I'd be loathe to pay big money for the "high end" ones I'd rather pay less and spend just as much time sorting it out.

    If it's oozing that much temp seems too high trouble is different pla and different colours can need different temps there is no one temperature fits all but if it's too hot then you'll just push the material around the bed and it won't have time to stick, drop the temps and make sure z zero is very close to the bed.

    Ben



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