Hi After I posted the pictures of my Robot NallyCat a 3d printed version of opencat. I am still waiting for the Controller Card to arrive from China. I was in need of a project, My Android head Buddy is waiting for parts but it is finished except for programming, I will show Buddy to you in a couple of days and I had mentioned that I was thinking of making A Large open cat version using full sized servos. so I could install a camera, sensors, etc. Sooo, here is a couple of pictures of Big NallyCat which took a little longer to print then open cat. I had a Spool of Red and that is why the Cats are red. the Filament I use and the only type of filament I use is PET-g because PET-g is so strong there is very little infill 15% and I don't use much support if at all, these are tests prints of a concept, I have never had PET-g filament warp or come loose from the print bed and the parts are easily removed when the bed is cold. Have a look and if you have questions, I am always here lurking . I see a lot of Inmoov owners like myself were interested in open cat, but they wanted a large one, I know we like Larger Robots.
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thats a real cool robocat.
Hey Nalley. Just a thought here. I had the rotated picture problem for a while. I was using an iphone which accommodates for that with Windows that does not. So I would have to open my iphone pics and convert them to gifs that do not rotate. It is a hassle and there may be better ways but it works for me.I usually just open the pic in Windows photo-editor and re save it.
@Nallycat The larger one looks great and looks good print quality, something I’m very interested in doing.
What was the increase in size ratio from the original sti print files? I’m assuming the larger one uses the standard size servos?
@Perry_S I use a Samsung Android Phone to take the Pictures, The pictures don't Rotate when viewed on the phone and they are ok when I copy them to windows. only when I import them into Synthiam is there an issue. Synthiam needs to have a turn or rotate setting after Download and also a move setting so you can reposition the pictures with the text. and a way to Size the Images, so you can create a better display.
@cem I am very experienced with 3d Printing I started with a large CNC machine which I made from scratch and started printing with 3d printers when 3d printers first appeared, and after printing two Inmoov robots my skills have developed. what I am lacking is in the design stages, I envy members like Perry, S, and like Bob Houston,Will fxtst and there are others who can design using CAD type programs. I am limited to Copy objects and make basic changes. Open Cat is like that you just can't take the parts and enlarge them the scale between a mini and full servo is a lot different. I had to make compromises that have to be made to make parts fit. if you want I will make a part list showing each part and how to convert them. The print quality is Good CEM but they were made with the least amount of detail and at the fastest speeds the printer could handle, as these robots are a concept I had to make extra prints, trial and error.
@Nallycat
Thanks for the info, it would be great if you can make a part list showing each part and how to convert them, if its not to much hassle.
Regarding the difference in size from the original one, roughly how much bigger is it, ( two the size?? ) Roughly whats the dimensions of the large one?
Cheers Chris.
Chris I am still working on the conversion list for you. but the open cat is 11.5 inches long tip of tail to nose 29.21 cm and the height is approximate as the legs bend and is measured in the relaxed standing position is 6 inches floor to ear tips 15.24 cm. The large open cat is 18 inches long tip to nose 45.72 cm and the height is aprox 9 inches floor to ear tips 17.86 cm. Bruce
Never mind. disregard
@3dGuy I use 123 design and usually scale the stl. files in Simplify3d which I use to print. to design models from scratch I think you need a Cad program of some kind. Gael used Blender to create Inmoov. to me Blender has a steep learning curve. there are others but I do not want to take the time to learn one.
You did a great job making the model fit the larger servos. If you upload the files to thingiverse I am sure many people would love to make this cat. Hope to see your cat running around soon.
here are the files and the amount to enlarge the parts, just one note if you do try to make this robot, it is a test of concept and it is still not complete so do not become angry with me if you have a failure. I will try to help and you can contribute your ideas to me also, especially with the arduino and programming, not my fortay. we can make this a Synthiam community project.. This picture shows tibia part, note I do not use support when printing so the top edge has excessive material but it is easily cleaned up, I did not clean the parts up. also the servo horns on full size servos are not as large compared to small servos so they are a little short, note I used a servo screw to secure the ends, this works fine and is no big deal as it is secure. I use wood screws to hold the servos in, the servos on the body shown in the picture fit very tight and you may have to use a dremel tool to remove just a small amount to make them fit. some I did and some I din't have to ease the socket this varies with servos. I use Pet-g filament, printed on a glass bed with hair spray I use Aussie brand as the other popular brands are not easy to find in Canada. Infill is 15% bed temp is 80 deg and extruder is 245 deg. the parts "cat servo- shaft" are made in 2 sizes 66% increase for 4 units and 75% for 4 units. Down load the files from Thingiverse.com search for OpenCat no space between open and Cat open your Print program and enlarge the parts. I use simplify3d. which is the best I have ever used. cat-body.stl enlarge 66% In simplify3d that would be changed from 100% @ to 166% Etc. Etc. for all parts cat-body-board-holder.stl I have not printed yet as this will fit the board used cat-body-front-end.stl enlarge 66% cat-eyes.stl I have not printed yet as I have to fit a camera cat-femur.stl enlarge 75% cat-head.stl enlarge 65% cat-servo-shaft.stl enlarge 4 of these to 66% and enlarge 4 more at 75% cat-tail.stl enlarge 65% cat-tibia.stl enlarge 45%
Thanks Bruce, I totally understand about proof of concept’ Its a great starting point.
Unfortunately I have my 3D printer ( Flashforge Dreamer ) dual head assembly stripped down at the moment, due to a couple of faults. so it will be a little while before I can start playing around with prints.
My 3d printers are in good shape so I will be printing the cat out for testing with an IO Tiny and I am working on a robotic dragon using an EZ Robot V4. Both will have a moving head with a camera inside.
@mcsdaver I also have an IO Tiny and was going to use it BUT the IO Tiny does not have enough servo ports. I also think that the success of this design is the use of the MPU-605 circuit board as it is what makes a quadruped robot stable when walking. I do not have enough knowledge for doing this but maybe DJ could give us a suggestion on how to use the MPU-605 with an IO Tiny, or a EZ Robot V4 I will be using an arduino board and if anyone has a suggestion on what Camera to use with it, please tell me what I should buy. I like the dragon Idea, I think that would look cool.
I forgot the head needs 2 servos and another for the tail. I will be using V4 for both robots then. EZ Robot can use a gyro, so that is not a problem.
Hi nallycat, i am finishing the last 3d parts of the cat. All parts fit perfect. @DJ, regarding the MPU-6050. I bought a standard MPU-6050 and i would like to know if EZB V4 could handle the processing speed needet to balance the robot or would it be necessary to use an arduino? How would one balance a robot in synthiam.
Hi proteusy just a few days ago i got the controller from china for the small nallycat, it would also work for the big nallycat, I want to try this controller with synthiam plugin for arduino nano. my problem is getting the program for the open cat to load into the arduino I keep getting error msgs. the same problems I had when installing arduino controllers on my inmoov robot, and why I went with ez-robot. programming arduino is a pain in the butt. as for using mpu-6050 there are tutorials in synthiam for that, my Idea is to use arduino first with the open cat already designed setup and then add EZ-B after it is working.
What error messages do you get? I loaded the open cat to the arduino with no problems.
Hi proteusy which file did you load? the one for opencat on thingiverse or the one from open cat nibbles site. I am using the controller from the thingiverse site as I am using the HuaDuino controller. the files are from github and have unknown characters that arduino does not recognize.
I used an arduino uno and these files on github : https://github.com/manic-3dprint/EzOpenCat. Have u managed to install all libraries?
No I had trouble with the libraries also what version of arduino software are you using?
The latest one 1.8.9.