I must be CRAZY….hanging printer?



  • Okay….so...I was watching Toms3d video here: https://youtu.be/vckxUk8xISc

    Github link (obviously) here:
    https://github.com/tobbelobb/hangprinter/tree/Openscad_version_3

    I heard they used a Ramps board, which makes sense simply because of the cost of it, assuming it's all 3D printed with an inexpensive printer and someone uses a measuring tape, I cannot imagine this coming out very precise.

    ….Stay with me now...

    What would happen if someone genuinely dedicated a room and tried to really do this idea Justice. Similar to the hanging CNC router

    https://youtu.be/y60q6U7NjTQ

    This method of manufacturing intrigues me, however, not in their current form, more the potential of it.

    What would happen if powered by a more competent controller with better firmware and better measurement equipment? The way I see it with my current experience and education (which is definitely limited) the precision of the measurement equipment is usually the most significant limitation. With the use of a device similar to this: https://lasers.leica-geosystems.com/disto/e7400x

    Which according to specs is only about +/-1/16" or about 1.6mm and can tell you if you are parallel to a flat surface with "+/-0.1° out of 360°"

    I wonder if high resolution is really required as the cost of measurement equipment for marking out quickly goes up significantly. Doing this the way I know with precision machining will take A LOT LONGER with the tolerances I'm used to (+/-0.005"). Is that necessary? Guess it depends on what you're making.

    This might open up a few possibilities if the Motors can be controlled very precisely. What are people's thoughts? What would you make if you had one?



  • The hangprinter is a novelty but I've yet to understand the reason would for dedicating a whole room to making (often small) 3d printed parts when a 2x2x2 ft cube does the same job and leaves me the rest of the room to use for other stuff, unless you have more rooms than you know what to do with. Why not suspend the cables from the inside of a slightly smaller "frame" and why not make the cables a bit more rigid and call them axes?

    Sure it's interesting but gets attention as the concept is clever, I'm not sure it has much practical use. The hanging cnc by comparison is a much more compact and cheaper way to achieve a 2d router, than the gantry style conventional alternative. But isn't a delta printer a hanging unit, just with way more rigid arms and way more precise?

    I'm not quite sure what the link is to the angle measuring device?


  • administrators

    Hangprinter kinematics are supported in RRF 1.20RC1. Nobody has reported using a Duet to control a Hangprinter yet.



  • Forget the room. Hang it from a tower crane, fit a concrete extruder and print a house 🙂



  • I'd say SCARA is much better suited for that - you need a lot of anchor points for a hangprinter.



  • 3 tower cranes?



  • Nah, it's one tower crane, but 3 additional anchor points in a triangle around the house. You'd need a really large plot of free land to accommodate that.



  • @DjDemonD:

    The hangprinter is a novelty but I've yet to understand the reason would for dedicating a whole room to making (often small) 3d printed parts when a 2x2x2 ft cube does the same job and leaves me the rest of the room to use for other stuff, unless you have more rooms than you know what to do with. Why not suspend the cables from the inside of a slightly smaller "frame" and why not make the cables a bit more rigid and call them axes?

    The key here is a room doesn't actually need to be dedicated to the machine, you just need a time slot in an open room, setup, print, tear down. This system is very well set up for fast and easy setup and tear-down and easy portability, making a rigid frame defeats all that. Most of the images I see are for very temporary installations, like two day shows and such. Most of the parts I've seen made with Hangprinter well exceed what you can build in a 2ft frame.

    I don't think it's for everyone and I don't think the designer ever tried to claim it was.



  • @DjDemonD:

    The hangprinter is a novelty but I've yet to understand the reason would for dedicating a whole room to making (often small) 3d printed parts when a 2x2x2 ft cube does the same job and leaves me the rest of the room to use for other stuff, unless you have more rooms than you know what to do with. Why not suspend the cables from the inside of a slightly smaller "frame" and why not make the cables a bit more rigid and call them axes?

    Sure it's interesting but gets attention as the concept is clever, I'm not sure it has much practical use. The hanging cnc by comparison is a much more compact and cheaper way to achieve a 2d router, than the gantry style conventional alternative. But isn't a delta printer a hanging unit, just with way more rigid arms and way more precise?

    I'm not quite sure what the link is to the angle measuring device?

    I was thinking for legitimate furniture and if you did it right, and had fixed anchor points and a highly repeatable locating system that you could print things very quickly in a room, disassemble it so it wasn't a complete waste of a room, but still focused, and end up saving a fortune over the life of the home…or apartment if it isn't furnished.



  • @dc42:

    Hangprinter kinematics are supported in RRF 1.20RC1. Nobody has reported using a Duet to control a Hangprinter yet.

    I was unaware of that…hmmmm I'm going to experiment with this then. I understand the scepticism of the practicality. Personally, I expect >90% chance of complete failure. If the firmware already supports it...I'm going to buy a few new duets 🙂 Thank you!



  • @JRDM:

    @DjDemonD:

    The hangprinter is a novelty but I've yet to understand the reason would for dedicating a whole room to making (often small) 3d printed parts when a 2x2x2 ft cube does the same job and leaves me the rest of the room to use for other stuff, unless you have more rooms than you know what to do with. Why not suspend the cables from the inside of a slightly smaller "frame" and why not make the cables a bit more rigid and call them axes?

    The key here is a room doesn't actually need to be dedicated to the machine, you just need a time slot in an open room, setup, print, tear down. This system is very well set up for fast and easy setup and tear-down and easy portability, making a rigid frame defeats all that. Most of the images I see are for very temporary installations, like two day shows and such. Most of the parts I've seen made with Hangprinter well exceed what you can build in a 2ft frame.

    I don't think it's for everyone and I don't think the designer ever tried to claim it was.

    Someone that sees this the way I do!
    Hallelujah!

    I simply meant if one could afford a more permanent/long term solution…one might be able to improve the quality or speed of the system.



  • One tiny flaw that I see is that you mention "printing furniture" and "quickly" in the same sentence. I think you'll find that a trip to IKEA would be both quicker and cheaper (unless you have free source for several kms of filament).


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