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If each of the shoulder joints connected to a motor and propeller, you would have a flying printer with motion controlled by the relative RPMs of each motor?
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jason.fisher
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Delta Machines
Would CNC world parts work for us here?
by
jason.fisher
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Delta Machines
Could you solder a tab onto it instead of grinding a piece off? Maybe you could use a gear piece that had a drip slot, where you could drop a piece of hot solder and it would fuse to the spindle and heat up the plastic around it just enough to form a fit?
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jason.fisher
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Delta Machines
@uncle_bob - What size plate are you looking at? Would you CNC away a couple of one-off standard aluminum plates?
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jason.fisher
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Delta Machines
Would an L-shaped piece be preferable over a tube? You could line it up so the rod is partially inside of the L? Maybe like a one-piece steel bed framing piece?
by
jason.fisher
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Delta Machines
@A2 - Lamp rod is a fantastic idea.
I found this ceiling fan down rod that comes in multiple finishes and sizes. 3/4"x12", 1/2"x24", 3/4"x24"
Might be good sizes for a 1X or a 2X LISA? The thread also has a pin hole through it.
by
jason.fisher
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Delta Machines
@uncle_bob - I have been thinking about polycarbonate tubes for the arm lengths instead of aluminum. Higher temperature than PVC with less sagging and good strength, light weight. I think you could use polycarbonate with a moderately heated chamber?
Or let's go in on an X-Winder and make a few dozen carbon fiber arm tubes..
by
jason.fisher
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Delta Machines
Just noticed this .. jumping on the bandwagon.
I think for bounties to really work, you need them prominently in a sidebar of the site, or even a way to see the list within the slicing app itself.
by
jason.fisher
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Bounties
Have you considered/tested larger nozzle sizes for your large format buildouts?
by
jason.fisher
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Delta Machines
Could you use threaded rods and threaded-on arm effectors to allow for easier tweaking or extending of arm lengths? Maybe two threaded rods in parallel like the bones in your forearm? Would give us something to do with all of those old Mendel Prusa rods lying around..
Something like that could make it easier to bootstrap a 1m LISA.
Thread rods for arms also makes me think that maybe you could
by
jason.fisher
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Delta Machines
Is it worth looking into threadless ball screw designs again for cost effectiveness at this scale?
by
jason.fisher
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Delta Machines
If you mounted these arms (steppers and all) on LISA's lead screws, would you have 6DOF?
by
jason.fisher
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Delta Machines
I have a 4' tall by 2' long/wide MDF cabinet on casters with a glass door that I have been looking for a design to build into.
Would the 3/8" screw be enough with a rigid cabinet? Or at that length, is the larger screw even more important? ~$210 vs $370?
This seems very straightforward, but it may make more sense for me to mount the steppers and electronics on the top of the cabinet for acc
by
jason.fisher
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Delta Machines
Could you print a supporting threaded piece that applies slight pressure against the top/bottom plates using feet and thread tension? Maybe you could gain some stability here by having two of the legs wrap around the PVC, or drill into the PVC somehow? The arms shouldn't hit bottom, so there is some room to play with?
Profile:
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by
jason.fisher
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Delta Machines
Maybe acrylic sheets with magnetic corner stubs could be used for simple/easy-access walls? You could include a tab at top/bottom center to secure the acrylic sheet laterally.
by
jason.fisher
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Delta Machines
I was thinking that if you had the entire rod length to travel without interference, you could use some kind of conductive tape on the resting point of each rod end and run through a movement pattern to determine the length of the rods. If everything were level, you would only need to do this from the perspective of one of the rods .. I suppose where the stepper lies doesn't really matter, as lo
by
jason.fisher
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Delta Machines
Watching the youtube video again, it seems like the bottom few inches of travel on the rods are wasted. If the steppers were a touch higher than the bed, you could increase build area for free.
That might also help with the end-stop design?
by
jason.fisher
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Delta Machines
How would the dynamics of supporting this machine change if the entire machine were suspended or bolted to the underside of a desk/cabinet? Maybe this is the perfect design for taking a 3' media cabinet and stacking two of these on top of eachother inside.
I have one of these MDF media cabinets that I have been thinking of converting to an enclosed printer:
I was thinking of a design where t
by
jason.fisher
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Delta Machines
You could build strut supports surrounded by a half-circle guide that a PVC size 'fits' into, so you could either string easily or slide a piece of pipe in place, or not use it at all?
by
jason.fisher
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Delta Machines
Could the steppers be face-down where the PVC is, with a gear to the rods?
The orientation of the steppers in this design and the open space between them could let you run (slowly) all three rods with a large gear and a single stepper motor, with a switching interface using solenoids or some other creative printed gearing/engagement/transmission mechanism. But maybe the cost is a wash vs extra
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jason.fisher
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Delta Machines
Very novel. Could you animate a version that has one input mechanism and two outputs? i.e for synchronizing both sides of a Prusa-style Z? You could do some pretty interesting things with multiple outputs with varying 'cam' pass-through profilers.
QuoteGuizmo
This is the remoter.
A device to remote drive a turning mechanism. It has 278° of turning capacity and a 1:1 ratio. You drive one pull
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jason.fisher
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Delta Machines
What about oozing? Where is the motor/hobbed bolt?
by
jason.fisher
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General
nicholas.seward Wrote:
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> I am think of using expanding foam of some sort to
> allow for quick proof of concepts.
I have been thinking that foaming is something we might be able to do in-line with PLA filament (maybe mixing four filaments into one extruder) or granules as a source, where the extruder action is tied to a peristaltic pum
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jason.fisher
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Delta Machines
So about the size of a bass drum..
I am excited for the large format/foam printer. I would like to print large foam cores for carbon fiber wrapping..
by
jason.fisher
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Delta Machines
Braided Carbon Fiber Rectangular Tubing ~ 2" x 1" x 96" @ $250 -
If I were to cut this into six pieces of 16" lengths for the arms, and say we lose ~an inch per length embedding into a joint, what kind of build area would that give me vs the standard design?
by
jason.fisher
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Delta Machines
Your process description makes me want to google.
Some interesting links:
What if we could print using a periscope multi-tool arm into a sealed pipe/box?
Could you print a thin layer of higher-temperature metal using weaker bonding non-vacuum processes (steel) as a shell that lets you deposit contiguous lower-temperature but higher strength (aluminum) material? i.e. printing a bathtub
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jason.fisher
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MetalicaRap
Could you do this with a solenoid-powered hammer and a blast of dry-ice vapor? I am picturing something that is like a 4-part multihead?
Does it make sense to print the outer shell of the object and temper it completely before depositing a solid infill? Would tempering the shell allow it to withstand higher temperatures than the material being deposited?
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jason.fisher
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MetalicaRap
Instead of a metallic bed, what if you were to use a standard piece of aluminum foil that is probed and removed? I think foil packaging usually provides the thickness in mils?
by
jason.fisher
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Delta Machines
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