Acuity of 3d printing machines

Discussion in 'CAD Corner' started by Clarence3815, 20 September 2020.

  1. Clarence3815

    Clarence3815 Active Member

    I was told some years ago that the McLaren F1 team had equipment that could print to 1 micron accuracy.

    I thought I was having my leg pulled.

    Anyone know what can be achieved?

    Bernard
     
  2. michl080

    michl080 Western Thunderer

    morning Bernard,

    I guess 1 µm accuracy is achievable, but 1 µm resolution is not.

    Accuracy basically means that a points can be set within 1µm of its true target point.
    Resolution is the size of the smallest piece of material that can be placed. The laser focus point won't be much smaller than 5 µm, so the smallest possible volume of material is about that size.

    Michael
     
  3. Brian McKenzie

    Brian McKenzie Western Thunderer

    Exaddon, based in Glattbrugg, Switzerland printed these rather amazing 'David' statues in copper.

    Product - CERES Print System | Exaddon AG
    Their CERES system prints tiny objects with nanometer resolution, in sizes from 1 µm to up to 1000 µm

    3D printed David statue1mm and 0.1mm tall.jpg

    The 0.1mm tall example at right might be one way of illustrating Michael's point about the difference between accuracy and resolution.

    -Brian M.
     
  4. Clarence3815

    Clarence3815 Active Member

    That truly is impressive.

    Well I`m impressed at least.

    Thank you,

    Bernard
     
  5. Clarence3815

    Clarence3815 Active Member

    How were the pictures taken? Very good macro lens obviously.

    Bernard
     
  6. Arun

    Arun Western Thunderer

    One of the problems is that what we call 3D printing actually isn't. It is actually 2.5D!
    The reason is that whilst the print head/LED moves/scans continuously in the X & Y axes, the Z axis [vertical bed movement] is a finite step. What is currently under development is a continually moving bed for SLA printers. That doesn't exist yet but there is an interim halfway house [a sort of 2.6D printer] where the print bed rotates and that, in my experience, quite dramatically removes the stratification on models with spherical surfaces.
    I've just had the 7mm Bedford RL cab printed on a Stratasys J55 agency printer and for a vehicle cab with multiple curved surfaces, there was almost no cleaning up of stratification to do.
    These are very expensive machines and because of their being a 'work in progress', available only to commercial agencies. However, the quality of agency output continually improves and the true 3D SLA printer is (I am told) in sight.
     
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  7. ianlbsc

    ianlbsc Western Thunderer

    2020-11-10.png
    Elegoo Mars2Pro at 0.02mm layer. The chain is on the end of a 7mm ballast wagon for the LB&SCR. It broke where the support had been placed. Quite sharp!
    Cheers Ian
     
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  8. ianlbsc

    ianlbsc Western Thunderer

    The pin down brake chain, same size as the other one. I lent it against the main part. Did other companies have their initials everywhere? brake block and hold down.jpg pin down brake chain.jpg
     
  9. Lancastrian

    Lancastrian Western Thunderer

    Now, that is impressive :thumbs:

    Ian
     
    ianlbsc likes this.