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Here's what I made, here's a photo, and here's a link to the [[page]] on RepRaps wiki!
Re: Grounded Experimental Delta Printer - 12 years ago
John McKinney Wrote: ------------------------------------------------------- > Hey everyone, 100% newbie here. I would like my > first 3d printer to be one of these open source, > self replicating kits. I really love your design > here Nicholas. Could you go into some detail > about your printer vs the Tantillus? Where do you > see the Simpson a year from now? Does your >by nicholas.seward - Delta Machines
Re: Designing and building a robot arm 3D printer and would like your input - 12 years ago
Cool rendering! 1) Your arms will need to be much thicker to not droop. Stiffness is proportional to the arm thickness^3. Double the thickness and you get 8 times the stiffness. You would do better with thick plastic than thin metal. 2) As is you don't have the torque or resolution needed. You will need some pulleys and belts or other such things. If you didn't have the two motors on the aby nicholas.seward - Polar Machines, SCARA, Robot Arms
Re: Grounded Experimental Delta Printer - 12 years ago
That was one of the best articles that I have ever read. Good job making me sound smarter than I actually am.by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
The scaling issue was from a typo that I have since fixed. I pushed really hard to self-replicate but ran out of time to get it done for the Gada prize. I am going to take a week off and then hit it again. I don't see any reason why Simpson won't become a true ReRap.by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
Simpson now has a wiki and is on Thingiverse. I hope I can start sleeping now.by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
There are some completed RPM's but I have never been there when they are running. I have only seen the XL in action.by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
It is a thing of beauty.by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
I actually started working there part-time (You would think working on Simpson would take up all my time. The trick is not sleeping.) to just be around some cool people and machines. (Hopefully, it will help me get my printer faster) They are currently building up a lot of XL printers. I can assure you that the machines are extremely well engineered and they are being assembled with love. Theby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
The math is no more complex than the Rostock meaning that this can be done in standard firmware. I however have not gotten around to doing the firmware. I do have a gorgeous Python script that will transform the coordinates and break long lines into segments. It will even go so far as incrementally adjust the sent feed rate to keep the real feed rate constant. After I get baby Simpson done, Iby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
@Annirak: I am going to refer to the arm's drive mechanism as the Annirak Drive. Better yet, I will call it whatever you want me to call it and attribute you with it. Do you want me to use your real name? What is it?by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
I did a complete rebuild. I stiffened the springs, stiffened the central hub, increased the mechanical advantage, got rid of no go areas on the bed, made a workable leveling algorithm. It was a lot of work but there isn't much to show. It looks almost the exact same as before. Trust me that it is better. I currently have some scaling issues and I have to perfect the leveling algorithm. Onceby nicholas.seward - Delta Machines
Re: Idea for making parts larger than given space. Make a team in Southern California? - 12 years ago
@VDX: I like the 45 degree slicing idea for fused filament setup. All the problems seem to be software. @sv1337: Endless printing is going to happen. I think it can be done on the cheap. I am personally interested in an automatic part ejector but would also be interested in oversized prints. My advice, assume it will work and search for the easiest simplest setup that will make it come true.by nicholas.seward - Developers
Re: HBot using fishing line - 12 years ago
Polygonhell Wrote: ------------------------------------------------------- > Just a prototype for the new filament drive, more > details on my blog. Beautiful. I can't wait to see it in action.by nicholas.seward - Developers
Re: Grounded Experimental Delta Printer - 12 years ago
First, do you guys think I can make my drive pulley fit very snugly on the stepper and in the process remove the set screw? If so, that would simplify assembly. My wife also suggested that I put a spiral groove on the pulley. I face palmed because that is so obvious. I should talk through the design more often with her. As you can tell, I am part reduction mode. The lasercut version has loby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
VDX Wrote: ------------------------------------------------------- > Hi Nicholas, > > really well done! > > It shows, the stability of the head is good enough > to stay in place with low torques. > > Next question - how fast can you go with some > 'beefier' motors? The motors are more than beefy enough. I could easily pull off NEMA14. I actually might be able toby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
I didn't expect it to be this good at this point. I always expected it to work but I was doubtful that it would be able to do high quality prints. I have about 5 optimization that I am going to throw on next week so I think this has the potential to be a serious printer. This is a testament that if you throw enough engineering at a problem you can eventually solve it.by nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
SIMPSON'S FIRST PRINT Here is Simpson showing off his creations. I didn't print all at the same time. In fact, I won't be able to until I work on bed leveling issues. Left: 30mm/s, .3 layer height, no standard bowden tweaks (The filament drive had a loose set screw.) Middle: 30-90mm/s, .4 layer height, no standard bowden tweaks (This is my printrbot's configuration file.) Right: 30mm/s, .25by nicholas.seward - Delta Machines
Re: Rostock X-Y-Z Scale Issues - 12 years ago
I was so close. Glad you got it figured out. Happy printing.by nicholas.seward - Delta Machines
Re: Rostock X-Y-Z Scale Issues - 12 years ago
For some reason this has been stuck in my mind and I finally figured out why. 227/200 is extremely close to 17/15. XL Timing belt pulleys often come with 17 or 15 teeth and GT2 belt pulleys often come with 34 and 30 teeth. I would wager that the numbers you have in firmware are for a 15 or 30 tooth pulley and you actually have a 17 or 34 tooth pulley. If so, just multiply DEFAULT_AXIS_STEPS_PEby nicholas.seward - Delta Machines
Re: Rostock X-Y-Z Scale Issues - 12 years ago
If your prints are square then you have entered the correct geometry. I would put money that the mm/step (or mm/revolution or etc) setting for each stepper is off. Even if it is right, you should be able to scale it to get everything to work. Depending on how you zero the table, you may have to tweak a few other numbers.by nicholas.seward - Delta Machines
Re: RepRap - improvements - 12 years ago
I feel that you are overly concerned about the electronics. Understandable if you haven't done this before. I personally would suggest a one board solutions to start you off like the printrboard. I am personally in love with the Azteeg X1 but you have to buy stepper drivers to insert into the board. Most people like this so that they can be replaced if needed. (Azteeg X1 is built specificaby nicholas.seward - Developers
Re: Grounded Experimental Delta Printer - 12 years ago
Video Here is a rendering of my new design. I have just gotten back from QU-BD. They were generous enough to laser cut all my parts. I am now frantically printing out the remainder of the parts. (I hate plastic that isn't spooled. I am probably 8 hours behind due to rat nesting killing some of my unattended prints.) This is a very ugly design in my eyes. I think it will work but I hate thby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
VDX Wrote: ------------------------------------------------------- > ... your head with two gears hold in plastic won't > be stable enough - reread my post with the > 2-store-'press-bearing' - you need a much more > squeezed setup or the tool wont get enough > rigidity with printed parts! I pretty much do what you are saying only with side loaded off the shelf bearings instead ofby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
Thanks guys. I am sure trying. I have a radical redesign in the mix. I will be heading over to QU-BD today. They are going to help me laser-cut most of the design. Unfortunately, I don't get to reuse any of the printed pieces from my first attempt. I will be printing nonstop for the next 24 hours. (The design will work and will be great but it just isn't as elegant as my first attempt. Iby nicholas.seward - Delta Machines
Re: RepRap - improvements - 12 years ago
The standard way to contribute is to openly share ideas through the forum and the wiki. By documenting your ideas here you can safegaurd them against patents. Not that people can't steal these ideas and patent them but they will have less of a legal footing if they try to sue us. Share freely. I look forward to hearing your ideas.by nicholas.seward - Developers
Re: Grounded Experimental Delta Printer - 12 years ago
Simpson lives! This is the first (documented) dry run of Simpson. A RepRap 3D printer. There are some visible issues. The extruder will pitch and roll causing the extruder tip to be as much as 5mm from the expected position. I have ideas on how to fix that. Stay tuned. (Almost all the sound is coming from plastic pulleys grinding on plastic pulleys. I already have a redesign that shouldby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
@alagi: I am using this spring. I have actually already received the parts and they are stiffer than I hoped so I had to make some hangers to shorten the needed spring extension. I will have to run tests but I suspect that I can half the stiffness of the spring and transition to Nema14 motors and everything will be fine. The design as is should be able to do 5g plus without overcoming the sprby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
I finally figured out the work envelope. Each arm can drive the extruder from 3.568" to 15.259". If you do an intersection of the allowable zone for each arm you get this. The usuable envelope that sticks above the build plate is roughly a Reuleaux Tetrahedron. The tip is 8.5" above the base. The footprint on the build platform has a Reuleaux Triangle shape where the inscribed triangle wouby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
Here is the bill of materials. I am not going to stick to this exactly. For instance, I will use a 12"x12" heated bed but it is more expensive than the 8"x8". This also doesn't include tax and shipping. None of these prices are special bulk discounts. I have attached a more detailed spreadsheet complete with vendors. I would appreciate if you guys would take a look and see if I can furtherby nicholas.seward - Delta Machines
Re: Grounded Experimental Delta Printer - 12 years ago
Annirak Wrote: ------------------------------------------------------- > nicholas.seward Wrote: > -------------------------------------------------- > ----- > > It was > > 20 days ago that I seriously started thinking > > about making a 3D printer that has no linear > rails > > and low center of mass. 10 days ago I hit upon > > this basic geometry that aby nicholas.seward - Delta Machines