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Thread art

Discussion in 'Concepts and Ideas' started by Callum McDougall, Feb 20, 2022.

  1. Callum McDougall

    Builder

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    Hi everyone!

    My name is Callum, and I bought an ACRO 1515 machine a while back. The project I’m working on is probably quite unusual compared to standard uses for these machines - I have a form of computational art which involves rendering an image as a series of lines connecting pins on the perimeter of a frame, then recreating those images in real life with coloured thread (see my website threadart.co.uk for more). The ACRO 1515 machine was designed to replace the threading-by-hand process; I used a 3D printer to create a “thread spooler” which I could attach to the gantry arm, and with a set of GCODE instructions, the gantry would wind the thread around the pins in the appropriate order.

    Unfortunately, the ACRO has stopped working; the left Y-motor now judders when it moves. I think this is probably my fault for not treating it with sufficient care, e.g. knocking it a few times. It would be great if there was a quick fix to this problem, but from reading advice on forums and trying out a few possible solutions I suspect it’s permanently damaged now.

    For a while, I’d been thinking about getting a LEAD machine, because it would have several advantages over the ACRO (e.g. stability). However, it’s a lot of money, and there are a few uncertainties I’d like to clear up if possible before purchasing it.

    My biggest concern is speed. I haven’t been able to get good data about the max speeds of the different gantry systems. According to the OpenBuilds software I was running my ACRO at 5000mm/min, but the software seemed to be underestimating distances, with the result that the ACRO was in reality running more like 15,000mm/min (see the video I've uploaded, which can also be found at this link). I’ve been told that the LEAD is likely to be slower because it’s heavier, but I don’t know how much slower. I know this is a hard question to answer because there’s no official max speed, but I’d really appreciate any advice. Since my artworks sometimes contain over 10,000 threads, speed is extremely important to me. I would be very happy if it could run at close to the speed shown in the video, and even 50% of this speed would still be pretty good - is this a realistic expectation?

    If anyone is reading this who can offer assistance, I'd be really grateful. Especially appreciated would be:
    • Peoples' experiences with speed settings on the LEAD 1515 machine
    • Videos of the LEAD 1515 in action
    • Any other advice you might have about this project
    Thanks everyone, and happy building!

    Best,
    Callum
     

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  2. Alex Chambers

    Alex Chambers Master
    Moderator Builder

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    First check the wiring to the stepper motor that's not working - those symptoms are often caused by a connection coming loose or a wire breaking.
    Alex.
     
    Giarc likes this.
  3. Callum McDougall

    Builder

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    Hi Alex,

    Thanks for your reply, I checked and this did end up being the problem! I feel a bit silly now XD

    Really appreciate it!
     
    Alex Chambers likes this.
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Never feel silly! Particularly that symptom - is hard to put one and one together because the motor still somewhat works. It does happen often enough that we have a dedicated FAQ page for it docs:blackbox:faq-identify-motor-coils [OpenBuilds Documentation] so you really shouldn't feel bad! Happy you found the break though!
     
  5. Alex Chambers

    Alex Chambers Master
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    The only silly question is the one you didn't ask. :)
    Alex
     
    Peter Van Der Walt likes this.
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Agreed, we're much happier to answer questions all day long, compared to having to tell you the magic smoke is now gone :)
     

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