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Re: New arm design for Simpson style printer.
nicholas.seward Wrote: ------------------------------------------------------- > I am not following... > > In this design, the gear axes stay at a constant > distance from each other. I am...
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Re: Rostock Problems with X/Y Movement Stuttering
It depends on your printer geometry but it is not that bad. Here is an example of tower position errors because of delta segmentation for: * diagonal rod length R = 250 [mm] * maximum speed Vmax = 200...
View ArticleRe: Rostock Problems with X/Y Movement Stuttering
I was experiencing similar stuttering issues with my Rostock as well. Is there a way to computer DELTA_SEGMENTS_PER_SECOND ? Currently I have been using Johan's default value of 200
View ArticleRe: New arm design for Simpson style printer.
Nicholas, any chance of putting the designs for some of the joints/arms you've played with on thingiverse? I know you probably want to wait and put an entire design, but although you've thrown away...
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Re: Grounded Experimental Delta Printer
Micropositioning using cheap mouse cameras with Arduino Library 2D position finding using the “Christopher Carter Algorithm” Absolute 2D position encoding/decoding using a Gray Code pattern. Position...
View ArticleRe: New arm design for Simpson style printer.
Time is always the enemy. I will see if I can put up some stub posts. I am thinking about a repo for all of my work all of the time.
View ArticleRe: Rostock Problems with X/Y Movement Stuttering
Thanks Hercek that all makes sense. -Ben
View ArticleRe: New arm design for Simpson style printer.
How catastrophic would string failure be with this design?
View ArticleRe: New arm design for Simpson style printer.
@Jason: The strings are very important in this design. If they fail the entire arm would fall apart, as the strings do the double job of driving the joint and keeping it in one piece.
View ArticleRe: New arm design for Simpson style printer.
For a standard Simpson it is potentially bad. It could possibly destroy the hot end and a few plastic pieces. However, if you turned gravity around the failure would be no big deal. For a 1 arm SCARA...
View ArticleRe: New arm design for Simpson style printer.
Thinking about the guitar tuning machines - they're designed for two things, to be able to adjust the string tension very precisely, and to hold the tension without any kind of mechanical lock. We...
View ArticleRe: New arm design for Simpson style printer.
The tuners are so cheap. If I was to give up on the tuners I would want something equally hassle free. Ideas?
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Re: New arm design for Simpson style printer.
A ratcheted crank/knob, maybe based on something like [www.thingiverse.com] would be printable (albeit, I'd think you'd want ABS and not PLA), and could serve a similar purpose, especially with a...
View ArticleRe: New arm design for Simpson style printer.
Okay, I am on board guys. I have some ideas. What I need that I am not sure how to source or make is a smallish (3mm) shaft that can be driven by a plastic crank. A partially threaded M3 hex bolt...
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Re: New arm design for Simpson style printer.
[www.mcmaster.com] : Or maybe an L-shaped hex key. These are pretty cheap, too, and you can get them anywhere. [www.mcmaster.com] : Edit: Unless I'm mistaken, there's no significant need for this...
View ArticleRe: New arm design for Simpson style printer.
@Owen: Bet you that's an SAE bolt pictured. Auction reads: "Note: correct picture coming."
View ArticleRe: New arm design for Simpson style printer.
Hmm, you're right - that doesn't look like the right picture, it's obviously zinc plated and the auction is for stainless. But I've bought socket head bolts from those folks before, and all of the...
View ArticleRe: Rostock Problems with X/Y Movement Stuttering
Actually I kind of screwd up my last mesage. Since you increased DELTA_SEGMENTS_PER_SECOND I assumed you want higher precision and I predicated the first part of the message with for constant delta...
View ArticleRe: Grounded Experimental Delta Printer
Annirak: You said something about wanting a bend sensor, but they're too expensive for your purposes. I remember the team I was on (1683) in FIRST FRC kludging together a bend sensor, I think. I also...
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