Re: Six-Arm Simpson
Here's how a commercial CNC mill with 6-arms works: [www.youtube.com] Six-Arm Simpson would just be this inverted; the Annirak Drive instead of overhead arms.
View ArticleRe: Grounded Experimental Delta Printer
when adding multiple extruders wouldnt the math be much more complex since the arms isnt "rotating" around the center of the head, making the lenght from the "knee" to the hotend different on...
View ArticleRe: Grounded Experimental Delta Printer
The only answer to the question "is the math going to be more complex?" is YYYYEEEEEEEEESSSSSSSSSS. However, it isn't going to be unmanageable in software. Double however, the offset for the extruders...
View ArticleRe: Rostock Build with modfied traxxas parts
stratmaster458 Wrote: ------------------------------------------------------- > evamvid Wrote: > -------------------------------------------------- > The thing I am having the most challenge...
View ArticleNew arm design for Simpson style printer.
Hello to everybody, I'm new to this forum, and except for 2 or 3 posts made on the Nicholas Seward Simpson thread, this will be my first real contribution. I certainly think Nicholas' design is...
View ArticleRe: Grounded Experimental Delta Printer
I finally decided on a new thread so not to deviate from the main development of Simpson. You can access it here: New thread It is about my idea of a new arm. Thanks!
View ArticleRe: New arm design for Simpson style printer.
How about replacing your oval gears with a Double Lamina Compliant Joint? In principle, a DLCJ should be able to replace any gear pair as long as you limit the rotation. That is not a problem with...
View ArticleRe: Six-Arm Simpson
I can't figure this out in my head but say we have a standard Maggie with 6 arms instead of 3. We change the hub to a hexagon with 6 ball joints (or other 3DOF joint) at each of the vertices. Will the...
View ArticleRe: RepRap 3DR Delta printer Released
I fixed some mesh errors and adjusted the interior area around the endstop mount to make the Top Electronics Mount printable.
View ArticleRe: Grounded Experimental Delta Printer
I have followed this thread from the start, and I think that if the firmware can't handle the math it would not be good for future development as adapting the slicer will be harder than the firmware....
View ArticleRe: Grounded Experimental Delta Printer
Currently I do a coordinate transformation after slicing but before printing. This technique can allow for any crazy math that you can cook up. Eventually as we incorporate a RaspberryPI-like computer...
View ArticleRe: Six-Arm Simpson
It's not fully constrained if you have an equilateral hexagon. It is fully constrained if you have a non-equilateral hexagon. In that respect, it has a lot in common with the Stewart Platform. In...
View ArticleRe: Grounded Experimental Delta Printer
The math will not be a problem on ARM micros. It's only a few more ops than a normal delta-printer.
View ArticleRe: New arm design for Simpson style printer.
Thanks for the tip, Nicholas. I have to do a research now, it is the first time I heard of DLCJ and I do not have access to youtube. :(. You need to relax, it seems you have 10 projects in mind at the...
View ArticleRe: New arm design for Simpson style printer.
Ok, now I know. I found the Wally thread and I understand the principle. Problem is, that would eliminate the backlash for the last pair of gears, but not for the pairs remaining, that by the way,...
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Re: New arm design for Simpson style printer.
I like the gear train idea. I like it so much that I have tried it in the past. My findings were that the backlash is almost impossible to mitigate and the friction gets pretty unreasonable. I am a...
View ArticleRe: Six-Arm Simpson
Okay so I have 6 arms that connect in the alternating triangle pattern you mentions. What do I need for hub and shoulder joints? Do the bottom ones need to be 2DOF and the top ones need to be 3DOF?...
View ArticleRe: New arm design for Simpson style printer.
Well, it seems you have much more experience than me on this, so I will follow your advice. I'm making the numbers for the non circular DLCJ at this moment. Thanks
View ArticleRe: Big_Brother Laser 3D/CNC
I don't see a major failure, probably it has to be refined but I believe it could work. The problem I see is the plastic filament. It will probably need a 3cm (just to say big) diameter filament,...
View ArticleRe: Grounded Experimental Delta Printer
Superb design. Make it happen asap please! I will be first in line to get one. :)-D
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