If dirt is your primary enemy, then you must have been able to run the machines long enough to exorcise/outrun most other demons. Maybe placing a piece of felt/whiteboard eraser material in the Spectra path would help? Or maybe something about the design is naturally generating a static field that attracts extra dust?by jason.fisher - Delta Machines
Hey nicholas, check out the XWinder in booth MP10 if you get a chance. Thinking this is a toy that I could use.. Large format Simpson with carbon fiber tube arms and 3D printed end-cap joint/gear.by jason.fisher - Delta Machines
That is hot. When the head drops, it seems to jerk at the same spot each time. Is that a math problem? Acceleration seems like it would be very beneficial with this design also?by jason.fisher - Delta Machines
Could you do a custom fuselage shape by wrapping a 3D printed ABS or nylon frame? How well would this scale for something like a kayak?by jason.fisher - General
If we are talking about responding to oscillation, I think the better first focus is on milling techniques that minimize it? The negative of a lightweight head for milling is high oscillation potential. The positive is high speed. Perhaps using that high speed, you can mill in a pattern that reduces oscillation as a filter for the incoming/upcoming path. Then your counterweight algorithm starby jason.fisher - Delta Machines
Watching the videos of the arm in action again and I can't help but think that this arm/leg design that eventually gives us a workable bot that can walk and print.by jason.fisher - Delta Machines
This is probably the best place for Kossel support at the moment.by jason.fisher - Delta Machines
I love this printed gear bearing. Maybe not entirely helpful in this case, but still inspirational. You could print a circular inner bearing gear path and custom outer cam profile?by jason.fisher - Delta Machines
This could also be useful for dosing a hydroponic farm that does not use a big closed loop system. Move, draw water, measure pH/PPM, formulate (balance of 3 solutions), dispense, measure .. then on to the next.by jason.fisher - Paste Extrusion Working Group
Might be interesting to see a print using something like this epoxy-plastic for comparison against one of the "smallest print" contests. I would really like a plastic hot-end and a punp to try to print a seal between two plastic parts. I feel like if multi-tool is going to take off, we need better examples of possibilities.by jason.fisher - Paste Extrusion Working Group
Very cool. A butane torch attachment and bread dough and you can print a PB&J.by jason.fisher - Paste Extrusion Working Group
Storing calibration data on the host may be better for multiple toolheads anyway? i.e. offset extruders, varying nozzle sizes, a rotating toolhead?by jason.fisher - Delta Machines
I believe the Rostock firmware works with some modification?by jason.fisher - Delta Machines
I was thinking that you would drop a blobby shape with the approximate area/volume and mill away to subtract. It is actually a subtractive process that deposits its own feedstock vs using plates and blocks. You might mill after depositing so many 'layers' or to create channels to guide additional material into the general shape.by jason.fisher - MetalicaRap
Mentioned this to my uncle and he recommended, after etching, to reinsert the board and expose just the pads and wash the board (don't etch) the board afterward. This would leave the paint over the rest of the board to protect the copper - a solder mask.by jason.fisher - Laser Cutter Working Group
@A2 - I think I would just start a new thread for now, use it as a dumping ground, and then when you master the wiki you can copy/paste final solutions/designs there and a link back to the thread.by jason.fisher - Delta Machines
I always thought it would be cool to make an inductive levitating forge 3D printer. Maybe cut a small piece of wire, levitate until molten, drop accordingly. Maybe you could print and chill an encasing support material to help channel the droplets. i.e. could ABS hold the channels long enough for the droplets to cool, and then an acetone bath removes the ABS at the end? Maybe you coulby jason.fisher - MetalicaRap
If you were to lay down a 'layer' of water on top of a printed layer using the surface tension of the water to hold it to the top of the layer, and the water is only broken by the toolhead depositing the next pass, could that hold off oxidization long enough to allow the layers to fuse?by jason.fisher - MetalicaRap
@A2 - do you have a build log anywhere? I have a large format Simpson in the cards and am a fan of the hardware store approach where possible, with possibly thin-walled steel extrusions or laser-cut sheet metal for the arms? My goal is to be close to a 1m build area with a 4' X or Y length, but I might fudge the X by placing the bed on wheels on the ground, driven by a long steel rack gear. (tby jason.fisher - Delta Machines
I like the static bed for scaling up to a larger build area. This seems like a design that could become an upside-down T, where a mobile bed drives itself into position, and then drives away with the printed part when done.by jason.fisher - Polar Machines, SCARA, Robot Arms
How would this design work as a CNC mill, if you were to use thick laser cut sheet metal for the frame and ?? for the arms? edit: Just saw the Dremel remark. I need one of these.by jason.fisher - Delta Machines
I really like this iris business card design for its simplicity: - Neat animation of the internal operation of an iris: Good visualization of more robust iris design mechanics, but it is not constant shape in its current form: You might be able to build some kind of pitch into a design like this? I like the simplicity: Plastic spaghetti portioning iris: Nanomedicine iris design for dby jason.fisher - Plastic Extruder Working Group
I have been thinking of something along the lines of overlapping washers. When aligned, the washer opening is maximum size, or pull them apart to reduce the nozzle size. Or two fixed washers next to each other, with a third washer stacked on top that moves up/down to adjust the nozzle, using the space between for the nozzle output. Like a Venn diagram, sans overlap for maximum size and overlapby jason.fisher - Plastic Extruder Working Group
On the subject of resolution .. a stainless steel variable iris-type nozzle tip could be well-suited to a large format Simpson? Nozzle discussion might be off-topic for this thread, so I created a new one here ..by jason.fisher - Delta Machines
Maybe a variable rocket/jet nozzle would be more appropriate.by jason.fisher - Plastic Extruder Working Group
Has anyone experimented with using an iris-type mechanism to create a variable nozzle aperture? For example, Thorlabs sells stainless steel apertures with a 0.8mm - 12mm range. A slicer could identify an ideal opening size/flow rate for a given path and actuate a servo that connects to the iris via a Traxxis-type post, greatly improving printing speed while (with a more ideal iris) maintaininby jason.fisher - Plastic Extruder Working Group
If the bed were on a turntable, you could maximize the 3:4 design?by jason.fisher - Delta Machines
I had the same problem until I placed a load (an old HDD) on the 5v rail of my ATX power supply. The shipped laptop-size PSU died on me.by jason.fisher - General
Definitely interested in the large format Simpson thread. I have been working through large nozzle garage-scale designs with vehicles in mind..by jason.fisher - Delta Machines
How catastrophic would string failure be with this design?by jason.fisher - Delta Machines