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Everything posted by LesHall

  1. Nice flower, I have seen that design on Thingiverse many times and wished I could print it. Also I love the tug boat, anything electro-mechanical is exciting! Les
  2. Here in this animated GIF image (click for animation) we see the drastic evolution of Ivan the robot arm that occurred yesterday. When I realized that putting the motors in-line with belt/chain drive meant that the planetary gear joints could be reduced to simple bearing joints, this was the result. Ivan now accurately touches the magenta ball through -60 to 120 degrees at a radius of one to three section lengths, which I find to be quite a capable result for such a small amount of algebra and trig. He's also low in part count (about a dozen parts total) and both quick (relatively) and
  3. That must be what was happening then, I will switch back to the brass nozzle that was included with the printer. The steel one is just for abrasive filaments anyway. Well, that or run it hot and fast! Les
  4. Hi gr5, I see your point. I wonder what it could be then? I only did the test once, I will have to test more when I get home later this week. I have updated the firmware so that's ok. One possibility is that I am running a hardened steel nozzle that I bought here: hardened steel nozzle for abrasion resistance The guy who sold it to me said that it would have worse heat transfer capability than the stock brass nozzles. So maybe the heater is heating up the hot end and the thermometer but not as much of the heat is going into the nozzle and the filament is pulling heat away from the n
  5. Ivan has evolved so far since that design described above. Key new features include PVC connecting rods, larger gear boxes, all four joints have motors, many smaller details, and a trigonometry-based control system that plays the "touch the ball" game shown if you click on the following image. In that image a red ball is randomly positioned within a thick spherical shell around the robot. Then the software runs one algebraic and four trigonometric equations to calculate all of the motor angles. This puts the tool almost directly not the ball almost all the time, a nice innovation that
  6. Yes everything including the book will be open sourced. I have released AVA's Gear Toy 1,2, and 4 on Thingiverse already, and I am working on Ivan and the book. I can share the current Ivan source code with you if you want to have a look at it now, with the understanding that you will keep me informed of developments. Les
  7. here we see Ivan doing a much better job of tracking the red ball with the green tool. I can see it doing some type of 3D printing. Les
  8. medusa: ty for info, you know your printing very well i see! Les
  9. Yes I agree gr5, and I was wondering about that solution. The wattage rating on a resistor tells how much heat it can survive dissipating, not how much heat it will develop for a given voltage. If the resistance of the resistor is the same, then a higher voltage would be needed to take advantage of the higher wattage. I was holding off saying this because I was unclear as to whether the 50W heater had a lower resistance or not, I guess not, which makes it perfectly understandable. My solution? Run my UM2+ stock and wait for a later model such as the UM3 to provide greater heating capa
  10. Hi all, Sorry that this is vaporware, I plan to print it soon. Ivan is my companion robot. He has taken many small and playful steps in his development into a full robot. In this version, Ivan is an industrial robot arm. Here is the GIF animation that I will discuss with you: In this image Ivan is playing "touch the ball", a game in which a red ball is randomly positioned by the OpenSCAD design file for Ivan, then Ivan's motor angles are calculated according to four simple trig expressions that I developed and a touch of algebra as well. These do a good job of positioning Ivan's
  11. Hi gr5, The situation is that running a 0.8mm nozzle at 0.4mm layer heights and printing PETG, not sure the temp as I am away from the machine for a while, the plastic forms poorly above 20mm/s travel speed. I want to go 40mm/s but I cannot go above 20mm/s and still maintain print quality. So I am limited by the energy put out by the heater core. Les
  12. Here is the 50W heater cartridge at an American reseller of 3dSolex: http://thegr5store.com/store/index.php/ultimaker2-hot-end-heater-50w.html Les
  13. I found this: https://ultimaker.com/en/resources/252-disassembly for a tutorial on heater cartridge removal and replacement. Les
  14. Sander, can you suggest a tutorial that will be close (though likely not exact) to that area of the print head so I can see what will need to be done? Les
  15. This is vapor ware - just getting that clear right off the start. I have only designed the concept model in 1,000 lines of OpenSCAD CAD language file. Here is an illustration of the robot operating (click for animation): This robot, who's name is Ivan, has many fine features :)which I will attempt to describe here. First of all it is entirely 3D printed plastic except for the motors, fasteners, and electronics - and the fasteners are few and few in type. The motors are NEMA 17's, the venerable 3D printing motors used in almost every enthusiast 3D printer including the Ultimaker. Th
  16. Come to think of it, since I'm getting slow performance out of a 0.8mm nozzle, why not use a 0.6mm nozzle, get full performance for the nozzle size, and higher resolution? Will probably do that. Les
  17. from the website: Individually tested heater cable. We know how horrible it is to change it.1 Year guarantee. Not for use on clone blocks. http://3dsolex.com/product/50w-heater-um2/ "we know how horrible it is to change it" is not promising... and I'm not overly mechanically inclined. I'll stick with slow for now. Les
  18. How about this Volcano add-on kit? Volcano Kit Is that going to fit in my UM2 even though it is twice as long as an E3D? Will the electronics take the load? Les
  19. I use the one that came installed in it. I have a UM2+. I did not know an upgrade was possible?
  20. I use the one that came installed in it. I have a UM2+. I did not know an upgrade was possible?
  21. When I run my 0.8mm nozzle at a layer height of 0.4mm, I have to slow the speed down to about 20mm/s because the healer just can't keep up with that volume of filament. This is a major limitation in the performance of the Ultimaker. On the other hand, the Taz 6 now has the MOAR tool head with it's 1.2mm nozzle and upgraded heating and cooling components. It lays down filament like nobody's business. So my question is: Can the next model of the Ultimaker have an increased heating capacity? Les
  22. Version 1.0


    This is an upgrade of the "2" revision that has several improvements, mostly in size and proportion. Just in time for printing this holiday season, it soared up to second place among my prints, just above the "2" version and below my water purifier design. Nice! Les
  23. Now here I am with a band to play Some sounds unheard coming out your way You see, I rhyme by myself in time To call attention to this joke sublime It'll be about something dear to me My Ul-ti-maker that so dutifully Crafts my thought into phys-i-cal -ity, my joy my idolatry Now if the rhyme is not found in time Too bad, I'm new at this sort of thang I'm here to tell you about one small thing a way to improve Cura and the thing I mean to say is the following Booger Syndrome is the forking thing You see, I'm keen to 3D printing Yet my prin-ter is somehow lack-ack-ing The wis-dom
  24. I'm in too. I'm printing parabolic lenses. Here is how one looks in the LED test fixture that I made for this purpose (prior to polishing): BTW this stuff does not want to sand. I have grits from 100 down to 3000 in lots of steps and the 100 just will not cut into the defective layers (0.2mm layers). I am now attempting to print a differently proportioned but identically mathematical lens (thicker at bottom inside) at 0.1mm on a 7 hour print in the hope that it will be easier to sand (finer defects). It is quite "clear" to me (ugh the pun) that these clear lenses are frosted on t
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