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Cartesian XYZ machines with frames made of extruded aluminum, T-Slot, Makerslide, and more. See http://reprap.org/wiki/Category:Aluminum. Previously named "Extruded Aluminum"
Re: Mendel-parts Gen 6 'Marlin' firmware feedback - 14 years ago
:-) well i got it installed and working, but haven't printed with it. I haven't played with advance yet. before i loaded marlin, I burnt out my resistor i guess, since i can't heat up the block, and i don't have continuity through it. I ordered some more so it'll be a couple days downtime for me.by Buback - Firmware - experimental, borrowed, and future
Re: What are you doing with your failed/test builds plastic? - 14 years ago
Microwaving shouldn't do anything without some type of dopant or microwave absorber.by Buback - General
crazy idea: shake weight camera stabilizer? - 14 years ago
I was looking at Johnny Chung Lee's $14 camera stablizer. As absurd as it is, i think the shake weight might be useful in a camera stabilizer. perhaps mount the camera on one of the ends? i don't know how springy it is, i've never used one, but i'm sure we can design something to dampen any excessive bouncyness. I'm envisioning a similar setup to johnny's, but with the shakeweight involved soby Buback - Let's design something! (I've got an idea ...)
Re: Mendel-parts Gen 6 'Merlin' firmware feedback - 14 years ago
I'll give it a try tonight. And it's Marlin, not Merlin, apparently.by Buback - Firmware - experimental, borrowed, and future
Re: Sprinter w/ Gen6 heater/thermistor issues - 14 years ago
must have just been me. probably F'd up something, 'cause i re-downloaded it and started over and it's working now. ah well. case closed, human error again...by Buback - Firmware - experimental, borrowed, and future
Lawn mowing problem Article - pathfinding - 14 years ago
I read an interesing article about how to find the most efficnent path to follow when mowing a lawn, and imeadetly thought of layer pathfinding for reprap. A Victa-ry for mathematics by Burkard Polster and Marty Rossby Buback - Developers
Re: The importance of nozzle tip design and drag. - 14 years ago
I'm struggling with this same issue, as well, as I increase speeds above 40mm/s. Won't Perimeter W/T only effect the perimeter paths? There's something similar under Fill, but i don't think it works exactly the same, since the skeinforge manual says to decrease the number if you get sparse infill.by Buback - General
Re: Sprinter w/ Gen6 heater/thermistor issues - 14 years ago
Do you mean the jumper pins on the board, or the ATMega644p/firmware pin assignments? I'm reasonably sure it's not the jumper pins, since it works with 5D (and now with teacup, which i've installed in the meantime). Just so I'm clear, the jumper pinout silkscreen on the board says 1- temp 2- temp 3- heat 4- heat. i have a wire connected to 1, to the thermistor and back to 2, and a wire connectby Buback - Firmware - experimental, borrowed, and future
Sprinter w/ Gen6 heater/thermistor issues - 14 years ago
I've been using plain old 5d since I began printing back in january, but figured it was time to move to some new firmware. trying out teacup and sprinter. Sprinter is easier to set up and get working, all except the Gen6 heater and thermistor. when in repsnapper, i click "turn on heater" but the led on the board doesn't turn on. I also don't get any temp readings. I thought it was repsnapper,by Buback - Firmware - experimental, borrowed, and future
Re: vacuum forming + 3d printing new idea. - 14 years ago
I'm assuming, looking at the tools you listed, you'll need heat resistant molds. you can print out your shape and then make a plaster mold of it to use with the vacuum forming. Is that the general idea?by Buback - General
Re: RF & MW properties of PLA/ABS - 14 years ago
The joining study I linked to above has me thinking about using a microwave to weld printed pieces together, instead of using glue. I'll have to try some experiments of my own to see if it works.by Buback - Polymer Working Group
[SOLVED] Psyco Install Issues - 14 years ago
I installed it in the past, but can't seem to do it now (after a crash :-( ) when i click on the program it says "can't find msvcr71.dll". Anybody know what this is part of? .net? The wider web says just download the dll and try again, but i'm leary of downloading a random dll. windows 7 x86-64. the rest isn't important, since it did work in the past with the same hardware and OS Edit: Reby Buback - Skeinforge
Re: Wide gears - 14 years ago
I've been trying to think of use-cases where you need high-torque/low speed. best i can come up with is some type of wind, water, or human powered grindstone for milling grain. it's probably best for low-tech applications.by Buback - Mechanics
Re: Powder bed with Microwave post-process - 14 years ago
sounds like a goal: print some meta-materiel microwave super lenses. that's the kinda stuff that gets funding grants.by Buback - Powder Printing and Selective Laser Sintering
Re: Powder bed with Microwave post-process - 14 years ago
actually i was saying i can't think of a good reason to use microwaves, other than curiosity. i should have been clearer.by Buback - Powder Printing and Selective Laser Sintering
Re: Powder bed with Microwave post-process - 14 years ago
i can't think of a good reason yet, other than curiosity :-)by Buback - Powder Printing and Selective Laser Sintering
Re: RF & MW properties of PLA/ABS - 14 years ago
This might also help, if anybody has IEEE access. Electrical properties of biodegradable polylactic acid filmby Buback - Polymer Working Group
Re: Powder bed with Microwave fusing - 14 years ago
ok i think i understand: your saying that, for example, if the MW emitter is at the top of the printer, higher (z-axis) doped layers will shadow lower doped layers. Also, reflections off of complex model shapes like we print will lead to unpredictable heating. Both are good points i hadn't considered. Perhaps, microwave after each layer? it's probably possible to spray a MW reflective material/by Buback - Powder Printing and Selective Laser Sintering
Re: RF & MW properties of PLA/ABS - 14 years ago
I found an interesting article about joining PLA/Sisal "Green Composite" material using microwaves Feasibility study on microwave joining of green compositesby Buback - Polymer Working Group
Powder bed with Microwave post-process - 14 years ago
Here my an idea: A typical powder bed machine using powdered PLA, but instead of spraying epoxy, the print head sprays some type of dopant that absorbs microwaves. once the print is finished, the bed is exposed to microwaves, which heats the doped areas until the plastic fuses. I'm pretty sure PLA is transparent to microwaves at the wavelengths in a home microwave, since food containers made ofby Buback - Powder Printing and Selective Laser Sintering
RF & MW properties of PLA/ABS - 14 years ago
Can anybody point me to resources for the absorption/reflection/refraction characteristics of PLA and/or ABS at non-visible wavelengths? I am working on a specific project, but i think this info would be useful to have up on the wiki. I'm interested in 2.4 Ghz range, for converting a tv dish into a long range high gain wifi antenna, or at least making it easier to do so. most PLA containersby Buback - Polymer Working Group
Re: Microstepping, Z-Axis, and Thread Pitch - 14 years ago
Yes it will snap back to the nearest detent, but i don't think it has to be de-energized (like you said, in firmware) unless you just want to quiet your machine some, since de-energizing it will stop the motor squeel. Is your machine a prusa? The Sells mendel gears the steps down (up?) so that each step effects the z axis much less. Even so, it seems like moving, at most, half a step to the neaby Buback - General
Re: 16 micron resolution? What's the tech? - 15 years ago
such a small droplet of PLA has a lot of surface area for it's volume, so I think it would cool in transit and just bounce off the surface, unless the print head was very close to the surface. edit: However, this doesn't have to be so bad. if a coat of glue was sprayed on fist, the little solid balls would stick to the glue. it's be like a powder bed printer, except applying the powder selectiveby Buback - General
Re: Wide gears - 15 years ago
I still feel it's a valid printable solution for high-torque design problems. The big question is where that crossover point is; where it is just easier, cheaper, and/or more efficient to abandon the 'printable' goal and just pay to get the parts made out of metal.by Buback - Mechanics
Re: Wide gears - 15 years ago
I hadn't thought about the alignment, but that's a good point. herringbone would be a must. ok yeah i guess i was asking a bit much for a formula. :-) I can imagine that there are just too many variables when designing a gearbox, so a simple formula is out of the quesiton.by Buback - Mechanics
Wide gears - 15 years ago
Plastic gears can't transfer much torque; at some point, the plastic somewhere will start to deform. I was thinking about heavy earth moving equipment, and how they use very wide wheels in order to distribute the weight over a large surface area so that they don't sink into the ground. I assume that this same principle can be applied to plastic gears. I bet the proper technique, from an engineby Buback - Mechanics
Re: Maker Faire New York - 15 years ago
I went last year. it was about a month after i had heard about reprap, but just after i had ordered all my bits and pieces. It was really overall, not just the printers. I don't think I'd go again, though, myself. it's a long drive to the city for me, and then i have to drive through the city to get to queens. it was also 130 degrees or something that day and it's mostly outside, so it was harby Buback - New Jersey RepRap User Group
Re: Volume of plastic used - per layer? - 15 years ago
Well the volume in should be the same as the volume out. But even if it isn't, you already know the scaling factor from the Volumetric Dimension module. divide the number skeinforge gives you for the volume by your packing density number, i think. example 85mm^3 / .85(ABS) = 100mm^2 feedstock edit: or do you want the length? shouldn't be too much harder, you just need to find the volume forby Buback - Skeinforge
Re: what is considered the most accurate reprap clone? - 15 years ago
:-) oops i'll fix thatby Buback - General