Welcome to the Rectorsquid Channel. I write software and do a bunch of other fun stuff and sometimes I post videos of... software. When I'm not working at my day job, I'm playing computer games. And when I'm not doing that, I might sometimes be working on the Linkage Mechanism Designer and Simulator (www.linkagesimulator.com). You can support my work on Patreon (www.patreon.com/rectorsquid) or by sending money to my PayPal account (tinyurl.com/293476vh). Right now, I'm porting the Linkage software to the Mac and I need all the help, in the form of coffee, that I can get!
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I was curious and looked at what was written in the comments. But what surprised me was not the comments, but the responses to each comment, one by one. When I saw the blue reply text under each comment, I thought it was a bot at first. I was surprised again when I saw different solutions to the problems of those who expressed their problems with each comment. long story short you are a king :D
Thank you
you are a hero for this program
Thanks!
Amazing
Very good, Dave
Thanks!
David; I saw a display of "sculptures", in Hamburg, maybe 13 years ago, that had a real range of types of mechanics and motions...one that relates to 'linkages' had groups of rods and 'strings', driven by a motor, so that the rods formed geometric shapes that "morphed" into completely different shapes, the rods seemingly 'drifting in space' and quite suddenly becoming a new shape. I have some videos on my Mac, not at all HD, but maybe SD, taken on my Nokia N8. If you're at all interested, I'm happy to dig up some clips for you... They also had mechanisms with lights attached to mechanics, that you saw in the dark, where they made changing patterns in space, and then you could see them in daylight, to appreciate the cool mechanism, and the thought and work!
I would love to see the sculptures you are describing. They sound very interesting. My email address is in the Linkage program "about" box and in the documentation. My resume with my email address is also on my blog (blog.rectorsquid.com). You can try to send the video directly to me or post it somewhere - whatever is easiest for you will work for me, I'm sure. Thanks for letting me know. And now I'm going to go search the web for more info!
Very life like!
Second
awesome! The low angle really makes it look so much more realistic! I did dabble in crawlers many years ago (when people still used Tamiya TLT axles!) it's great fun and that is a great place to run them! Also thank you for your kind email, I will let you know if and when I build some more interesting linkages :)
there is no spline in my version
You must have an older version of the software and need to install a newer version. You can get to the Linkage information page here: linkagesimulator.com. There is a link at the top to the download page. The latest version is 3.16.14, and it has splines working in it.
@@rectorsquid yes you are correct, thanks. I am currently trying to change a 180° hinge that i have and am kinda struggeling with it. Are there some examples for that kind of thing? I mean the last version kinda worked but i don't know how to define the start and end position
How?
I added a white-colored link to a white-colored input anchor, and the falling link was moved that way. Then I pinned the mechanism in that position and replaced the input anchor and crank with an ordinary anchor to hold that fallen link in place. After creating the two videos, I edited them together to form one long video.
Can I get the dimensions of all linkage
You could install the Linkage app for Windows (linkagesimulator.com) and then open the sample mechanism. The "D" key then will let you see all the dimensions. Otherwise I need to find a way to capture then and post them where you can see them.
Grande
first
Can you get velocity, acceleration and force analysis with this?
You can export a CSV file with information about specific connectors, those that draw their path, and then extrapolate from that data. Position and speed are there, and acceleration can be computed from those. I'm unsure how to calculate force, given that the elements have no mass. But it does seem like output force as a ratio to input force could be computed based on simple leverage calculations - it's just that math is not my field of expertise.
looks so good!
Your linkage program is amazing and so versatile!
First:)
Question, if you were to take the triangle CAB where the hinge is located at point A then make it into a square of points CABD where the hinge would then be located at point D, could that create the same interaction between the two linear paths? I'm attempting to utilize this concept in the creation of fully 3d printable suspension going into the underbody housing of a model car. I have loads of room to intrude under the car (to the left of points D&E and above points F&G with the wheel attached to point G and cosmetic hubcap facing away from point G) and not much space in the areas in which points C/B stick out during actuation. Any help in visualizing this concept would be helpful. Thank you for the inspiration in your mechanical demonstrations.
Take a look at this video kzread.info/dash/bejne/lqOVmtOHccScXZc.html and let me know if that's what you are describing. The mechanism works but the motion is very limited due to limited lengths of the slide paths. But it is functional and other changes might give it a large range of motion. It appears as if the new version of this mechanism might be amplifying the motion although it could be because of mu rough placement of the various connectors and the pivot point location.
I also created this new mechanism which also uses a sliding connection: kzread.info/dash/bejne/p46tw9lyfpXKftI.html It might not be useful but it is interesting.
very good.
Could I download this mechanism(.linkage2)? I cannot find this on your blog.
There is no Internal Gear option in Ratio function. Do I need to enable it ?
Perhaps you have an old version of the software. Can you tell me what the version is in the “about” box? You can get to the about box in the help menu. That option for internal gears should always be there.
@@rectorsquid Yes, you are right. I realized it after some time and downloaded the newer version. Thank-you 👍
What is the name of the software sir
David you are a genius
Very cool! Reminds me of a theme park ride :-D The motor seems to be very noiseless, what did you use for a motor?
I can't recall what motor that is. It is a 110-volt geared motor that uses an external capacitor. I think it's about 2 or 3 RPM. It's maybe 1.5 inches across on top. I did a quick search on Amazon, and this motor looks similar if not identical to what I remember getting: www.amazon.com/Bringsmart-50KTYZ-Synchronous-Reducer-Barbecue/dp/B09H5PWRKG/ref=sr_1_7?crid=1DRXR3SB3AOLZ&keywords=110v%2Bmotor%2Bgear&qid=1707502380&sprefix=110v%2Bmotor%2Bgear%2Caps%2C173&sr=8-7&th=1
@@rectorsquid Many thanks for the info! I have seen that you are the author of Linkage?! Wow! Your Linkage download area is amazing with all these mechanisms. I definitely need to watch some tutorials before planning my first RBS.
I’m late to the game here… but man, I’m in awe… amazing job!
can I get to know what is the force and torque by this software,
This software does not have any force-related calculations in it. I do understand that the forces could be represented as a ratio to the input force without knowing or stating the input force. But that math is beyond what I know how to program and I would need detailed instruction on how to make that work.
Thanks for the drawings. Will be a fun project.
If you want to see my blog posts from when I was building this, they are here: blog.rectorsquid.com/2015/11/ and also here: blog.rectorsquid.com/2015/12/ There's some other posts in those months but only a few. The pictures will show you how I built the connecting rod ends. There are a few store-bought ball-and-socket connectors in this machine but I'm sure that something homemade can be made if that's important to you.
Can I get a copy of your design. DXF file.
The Linkage software can export DXF files but they are not going to look good. Linkage is a 2D CAD app so the top and bottom of the mechanism are not turned 90 degrees from each other as they are in the final machine - that rotation didn't affect the measurements enough to matter in the final build. There are also a bunch of drawing elements added to the mechanism design 1file and those won't be separate in the DXF file like they are in the Linkage file. Anyhow, here are the files: www.rectorsquid.com/temp/two-stage-lift.linkage2 and www.rectorsquid.com/temp/two-stage-lift.dxf
Hi, Dave. I've been using your Linkage for several years and its very helpful on my study. Just wondering if there will be additional tools which allow us to set the actuators run as per triggers (such an limit sensor or proximity in our real works) ?. one actuator run after another finish...
I have it on my list to make the motors and actuators programmable in multiple ways. But with the Mac port of the software ongoing, it's not going to get done anytime soon.
GENIAL !!!!! super TOP !!! tres beau travail !!!!!
Ever wish you had something fictitious, abstract because maybe you're the first to ever need it, and very much something dreamt up as from a far away land where the tool is always right and everything fits and you're simply content? That's what you have found here in this nook, with this software. Couldn't have written it better than reality, with a name like Rector, linkage software just sounds so right, like my childhood....like "Erector Set!" This is wonderfully received by myself, and humbly thank you a thousand times, and my family will speak your name in the halls of Elysium! On a more serious note, Thank you very much. I really appreciate the drawing feature. I'm curious regarding the playback... If it's currently possible, awesome! But I think I would really enjoy seeing how changing a link or anchor point would affect the resulting movement, and through drawing and playback, if one could manipulate the pieces directly and witness the resulting effect in real time, shifting to the new motion, could be extremely beneficial in intuiting, or visualizing mechanisms' form, and function. Anyhow, if that's already possible, I just haven't figured it out yet. thanks again!
Ah, the elusive instant feedback/playback feature. I tried it once but the data within the software can't handle doing the simulation while dragging things with the mouse. Changing that data would be surprisingly difficult. I do have it on my list to try to do the simulation after ending a drag operation but being busy with my day job keeps me from experimenting too much with the Linkage software these days. You've got me a bit excited to investigate this feature again though. Thanks for the inspirational words. If I get something to work, I'll post about it in various places. Right now, I have been focusing what little time I have on making a Mac version of the app. I'm close to having the editor work. It's along process porting 30,000 lines of source code to a new language on a new system. I'll have to think hard about the simulation-while-drag idea before I get too much further since I use the same data structure on the Mac as on the PC. Thanks again for the kind words. -Dave
What about adding Russian to the program? And subtitles in the video.
I wish I could but it would be a huge development task to add localization to this old Win32 MFC application. There is no good support in the old Windows API for translations and localization. I'll see what I can do about subtitles - I'm don't make a lot of videos and I'm still confused by the subtitle system (I have no idea if my English subtitles would get translated automatically by KZread).
Which software you have used?
This was designed with the Linkage software linkagesimulator.com
Thanks brother.I will try it.
Hi David Is it possible to have a rotating input anchor with a gear on it that doesn't rotate with the anchor? I deally the unit will have a shaft with one fixed and one driven gear on it and I'm trying to work out all the other components I suppose its like a planetary with a planet around a sun but i'm missing the sauce that makes it work in lnkage. Edi: I think I see another video that is closer to what I wanted to do here. I think I may have to drive this from outside instead of a driven anchor.
It is not possible at this time. I haven't figured out the best way to allow for that so you will have to work round it from "outside" like you suggested. Just use a non-rotating input anchor for that connector and use another rotating input to next to it to drive a gear on it. You can have multiple different gears on a connector so it should work fine. Send me an email at the address in the "about" box or in the PDF documentation and I can reply with an example mechanism for you. I really should add a checkbox to the link and gear properties to allow for any link or gear to spin freely on an input.
Fantastic!
Thank a lot sir. how to make something like movement of gas spring?
The software has no gravity or springs in it. You can possibly fake a gas spring using a linear actuator to simulate the movement of the spring. It is also possible to create a link with two sliding connectors that both slide on another link to act as a a springless "gas spring" (with that sliding link having a third connector to act as the end of the spring unit). Those are the only ways to handle simulating the movement of a gas spring as far as I know.
thank a lot@@rectorsquid
Thanks a lot for your work!
You're welcome!
Your software is amazing!
Thanks. I'm glad that you like it. I wrote it because I could only find software that was either too complicated or too expensive. it's been fun trying to figure out how to make it work in both the UI and the simulation.
Great program, but I am having issues making a simple mechanism. I want to increase the movement of a linear actuator. I built a 10 inch lever with a pivot point at 3 inches that connects to a linear actuator with 2 inches of movement. It will not run/pivot. I am having issue with creating the pivot point. Any suggestions? Thank you
If you find my email address in the "about" box and in the PDF documentation, you can send me the mechanism and I can look at it.
Hello, I am trying to do as you show, but I cannot select scrolling in the 3-point selection, what is the reason? Thank you.
Are you asking about "sliding" and not "scrolling"? Can you tell me which version of the software you are using since older versions might not work correctly? Try to get the latest version from linkagesimulator.com
@@rectorsquid 3.16.35 kzread.info/dash/bejne/Z4p8xceddaqXXc4.html Even though I did the same thing as in this video, the outside router did not follow the cam
Does it have a video of the working principle of the excavator? working principle of two cylinders and rotary movement. when the movement of the first cylinder ends, the movement of the second cylinder begins and finally the rotary movement.
There is nothing like that in the Linkage software. All of the actuators and motors run at the same time.
great tutorials!!! Can you turn on the subtitles???
I will try. I don't use KZread enough to know how to do that but if I can, I'll figure it out.
good
hello, David. Thank you for the software, it has been a great resource for my mechanism design project. But I need some clarity on how to create two slider connections in some of your videos like this one kzread.info/dash/bejne/dISMt5luqLK5ndY.html, thank you once again.
Select a three connectors and use the "Slide" operation to make one of them slide between the others. The order doesn't matter since two of the connectors will need to be both anchors or both on the same link and those will be used to define the path. Feel free to reach out via email (my address is in the app and in the documentation) for more help.
haha, as someone who always tended to be in the upper quarter of the field when it went uphill and bottom quarter when it came to downhill, that is really cool! Keep at it!
Thirty years ago, I was always at the back of the pack on the uphill and in front on the downhill. But that was just trail riding with no jumps or drops - mountain biking was sort of new back then and no one was doing BMX tricks on long trail rides like they are now.
First
Wow, this took me forever to figure out how to draw. I will have to make a video on it. it is very important the order you join A,S,P connectors. and snap settings, auto join to off
Is there any way I can lock the size of a link but not its position?
Select the link and use the Lock button to lock it. It should still be movable. If that doesn't work, let me know and I'll check for a bug.
@@rectorsquid I have a body of link representing a robotic arm, once I locked each link I can only rotate the whole thing rigidly, I would like the lengths to be locked but not the position
David...How can I get in touch w you to possibly hire you to design a system for me?
My email address is in the software "about box and also in the PDF documentation file. I can do a little bit of work for free to help out, but I don't do any paid work outside of my full-time programming job. Surprisingly, I'm not even close to being a mechanical engineer and anything I create that works properly requires a lot of trial and error. But you can always send me some info on what you are trying to do and if I have a few minutes to spare, I'll see if I can get you started on a mechanism for it.