Re: Grounded Experimental Delta Printer
You can actually go crazy with the design if you want to. L1/L2 needs to equal n/m where n and m are both positive integers. The ratio of the string wraps at AC vs BD will need to be m/n. This will...
View ArticleRe: Grounded Experimental Delta Printer
Please correct me if I'm wrong. I've still got to get some decent geometry software together so that you can see what I'm talking about, but here's my attempt at a description. For simplicity, I've...
View ArticleRe: New arm design for Simpson style printer.
HP used to make a plotter that used a single sparse-fine-grit-covered light weight shell as a roller on the back side of the paper to move the paper in Y while a carriage moved the pen in X. There was...
View ArticleRe: New arm design for Simpson style printer.
New arm look great with the motor on top :) Just curious, are you cutting (swept cut/extrude) the round root/crest gear profile based on a plane that is set "normal to curve" of the helix? (SolidWorks...
View ArticleRe: New arm design for Simpson style printer.
I am not sure what you mean. I have used Solidworks. Workflow: *Using my program that I provided above I import the cycloidal profile to the xy plane. *I extrude along the z while rotating in the z...
View ArticleRe: Idea: A blacksmith bot based on Simpson
@johnrpm that's almost exactly the idea behind voxel printing. Though using electrical discharges for welding would certainly be novel.
View ArticleRe: Idea: A blacksmith bot based on Simpson
I just have too many things on the go to do it, but if you have seen pnuematic air filters, the part should look similar, bone would adhere, so good for implants, all sorts of other things come to...
View ArticleRe: Idea: A blacksmith bot based on Simpson
If you're going that route, you could to fine-gauge MIG welding. If you can get the right mode of welding, the arc actually transports the metal to the work surface. Not sure what kind of resolution...
View ArticleRe: Idea: A blacksmith bot based on Simpson
Tried the mig welder thing some 20 years ago, Krupp have it patented, but as far as I know no patents on the ball bearings, if fed down a single tube at first, with an arresting collet, as each ball...
View ArticleRe: Idea: A blacksmith bot based on Simpson
Also check out Jeff Thompson's work on voxels. He did some experiments using a CNC to build things out of spheres. If you could come up with some kind of collet to hold the sphere, you could spin it...
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3DR "Simple" Delta Printer
I have a Printrbot Simple I haven't used since I got my MendelMax 2.0 up and running. So I've been thinking about what to do with it. Then RichRap introduced his 3DR printer. I thought this would be a...
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Re: Grounded Experimental Delta Printer
I have yet to verify Annirak's math but I felt it would be valuable to post a free body diagram of the nonrotated version. First, the drive pulley can support a tension differential F. This...
View ArticleRe: Idea: A blacksmith bot based on Simpson
Interesting stuff, I can not see the image though, I had thought of modifying the weld for support balls so they break away easy, but his idea of a sacrificial ball is worth trying. Sorry to highjack...
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Re: Grounded Experimental Delta Printer
Hello Nicholas, I believe the in your diagram the real levers are not r and R but the components of those distances that are parallel to the line that goes from the center of the line formed by the 2...
View ArticleRe: Grounded Experimental Delta Printer
@Guizmo: the green dot you have is always halfway between your red lines. This lets the math boil down to what I posted before. I drew the circles so you could the that the point of contact is half...
View ArticleRe: Idea: A blacksmith bot based on Simpson
It's ok. There must be something really wrong with my idea I think, because I can't find anyone who's tried anything remotely like it.
View ArticleRe: Grounded Experimental Delta Printer
@ Nicholas, Yes, you're rigth. My diagram has an error on that.
View ArticleRe: Idea: A blacksmith bot based on Simpson
dudesom Have you seen those pin blocks, where you put your hand into them and it keeps the shape, I imagine your idea like that, I have seen special vices with an array of adjustable pins to hold...
View ArticleRe: 3DR "Simple" Delta Printer
Looking good (tu) Are you planning on using spectra or belts?
View ArticleRe: 3DR "Simple" Delta Printer
I'm planning on using RichRap's drive system, which uses spectra line. As it happens, the donor Printrbot Simple also uses spectra line, but I won't be reusing it's line because it's too short. I'm...
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