Robotic arm throwing a ball for a game of pétanqueBlind
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swoday07
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Description:
Hi,I'm an educational content creator, and I'm currently authoring a course on mechanical engineering / control / robotics. For the course example, I'd like to build a simple robot on a rail with a few degrees of freedom that throws a ball. I'm not so well versed with Onshape, so would need help to make it look better, especially the gripping mechanism, the rail, and the other parts.
The robot is supposed to replicate a player in a game of pétanque:
www.youtube.com/watch
cad.onshape.com/documents/e6373cddd9e11ef3ed3c63e1/w/c5c2be2a5a79af89f98ffb69/e/dbf77a433ed8a91b737b253a
Wants:
You're free to modify the shapes as you see fit, but the overall dimensions need to remain the same (eg: length of the rail must be 4m). The gripper mechanism needs to be improved but it needs to be able to grip a ball of the same radius as what I supplied.
Don't Wants:
The design cannot have too many complex parts, as it will be imported into Simscape Multibody.
Software:
- Onshape
Prepaid PrizeEntries
#21 Robot Arm
by Inerapello
Download Files
- SolidWorks Premium 2022 SP1.0 — Robot Arm - Assembly
- SolidWorks Premium 2022 SP1.0 — Rail
- SolidWorks Premium 2022 SP1.0 — Rotating Base
- SolidWorks Premium 2022 SP1.0 — Sliding Base
- SolidWorks Premium 2022 SP1.0 — Body
- SolidWorks Premium 2022 SP1.0 — Arm
- SolidWorks Premium 2022 SP1.0 — Fore Arm
- SolidWorks Premium 2022 SP1.0 — Finger Left
- SolidWorks Premium 2022 SP1.0 — Finger Right
- SolidWorks Premium 2022 SP1.0 — Ball
Sep 28, 2022 16:02
#17 Robotic arm throwing boule in Pétanque
by Yugendhiran
Download Files
- Turntable configuration — original 14
- Robotic arm throwing boule — robotic arm
- SolidWorks 2018 — robotic arm link
- SolidWorks 2018 — Part2noncrane
- SolidWorks 2018 — link11
- SolidWorks 2018 — link
- SolidWorks 2018 — gripper arm2
- SolidWorks 2018 — gear11
- SolidWorks 2018 — base
- SolidWorks 2018 — gripper
- SolidWorks 2018 — robotic arm
- SolidWorks 2018 — gripper arm11x
Sep 27, 2022 13:08
Discussion
Hi @Yugendhiran, it doesn't necessarily need to be the same dimensions, as long as it's able to grab the ball adequately.
Hi Chinmayk, yes, as long as they're importable in Onshape. Parasolid / STEP files are preferred.
Hi @swoday07, and also you need the other dimensions for example thickness of arm in the given design is 12cm, so you need the design like nearly to be 12cm
Hello swoday07, can we make your model on different software.
Hi Yugendhiran, no, no need to show the internals :)
Do you need the internal drives and mechanisms to be shown like motors and stuffs?
Good morning, yes:
1) the ball radius will be max 72 mm (a ball of petanque is actually roughly between 70.5-80 mm in *diameter* according to Google, but it was a bit too small so I increased it by a factor of 2 in Onshape, see the variable "scaling" in the Variable Studio panel on the right)
2) the other dimensions should roughly be the same, the only constraint is the overall length of the rail, as it needs to fit within the court width (4 m), you can make the rail thinner or thicker, that is not a problem.
3) the idea of this project is to show how CAD can increase the visual fidelity of the robot arm without affecting its main purpose.
And finally, just to confirm the deliverable:
- Robotic arm assembly (rail, robot arm with assembled joints) as CAD files (eg: link to Onshape assembly, or if using Solidworks: STEP, SLDPRT) - ideally should be created in Onshape as the students are familiar with the tool, but Solidworks works too, as long as it's importable into Onshape without too many issues.
1) the ball radius will be max 72 mm (a ball of petanque is actually roughly between 70.5-80 mm in *diameter* according to Google, but it was a bit too small so I increased it by a factor of 2 in Onshape, see the variable "scaling" in the Variable Studio panel on the right)
2) the other dimensions should roughly be the same, the only constraint is the overall length of the rail, as it needs to fit within the court width (4 m), you can make the rail thinner or thicker, that is not a problem.
3) the idea of this project is to show how CAD can increase the visual fidelity of the robot arm without affecting its main purpose.
And finally, just to confirm the deliverable:
- Robotic arm assembly (rail, robot arm with assembled joints) as CAD files (eg: link to Onshape assembly, or if using Solidworks: STEP, SLDPRT) - ideally should be created in Onshape as the students are familiar with the tool, but Solidworks works too, as long as it's importable into Onshape without too many issues.
Hi @swoday07, can we go with the onshape cad model dimensions which you have attached. For example, the ball radius is 72 mm. Are these dimensions exact to refer for the final model.
you want the design or complete equipment along with the design ? Can be done
Hi, the idea is that students will first build the robot as it is on the screenshot (Picture 1) using fundamental shapes (bricks, spheres, cylinders, extrusions, revolutions), then once they get the mechanism working right (joints/mates), they'll implement simple control laws to make it throw a ball. Once it's working, we can substitute it with the more aesthetically pleasing CAD version that provides the same functionality.
hello
i can make it for you,
you want a model that looks like a robot arm and has a hand like gripper in front how many free moving axes do you want ?
should it be more parametric that you could build it or rather nice to look at?
i can make it for you,
you want a model that looks like a robot arm and has a hand like gripper in front how many free moving axes do you want ?
should it be more parametric that you could build it or rather nice to look at?
Excellent thank you!
No, it will be used just in robotic simulations. I just need to make it look a bit more sophisticated / more realistic, as currently it was created using simple extrusions and revolutions. The number of degrees of freedom and their locations should remain the same, and the gripper, if possible, should be able to open and close. The goal is just for it to be able to throw a ball: https://ibb.co/VHZLW8V
Another question, are you actually going to build this robot?
If so I will submit a design using hardware (nuts, bolts, bearings, etc) from a local vendors’ parts that you prefer to work with. Otherwise I will design it using McMaster Carr hardware.
If so I will submit a design using hardware (nuts, bolts, bearings, etc) from a local vendors’ parts that you prefer to work with. Otherwise I will design it using McMaster Carr hardware.
Perfect, I’ll start working on this then. I will submit as parasolid and if there are any issues importing that into onshape we can figure something out from there.
Hi SolidworksNinja,
As long as I'm able to reimport the entire assembly in Onshape for the students, and as long as the different CAD parts do not deviate too much in terms of functionality from the example provided in Onshape, I think it would be alright. Otherwise, I'll just request a license for Solidworks from my company and we can move on from there.
As long as I'm able to reimport the entire assembly in Onshape for the students, and as long as the different CAD parts do not deviate too much in terms of functionality from the example provided in Onshape, I think it would be alright. Otherwise, I'll just request a license for Solidworks from my company and we can move on from there.
Another Solidworks user here, you mentioned you wanted to use onshape but for some reason aren’t able to accept work done in Solidworks? (As per answer below)
I can do the design in Solidworks and export into any file type you want. Parasolid (.x_t) files usually work well in onshape.
Typically these contests come with a list of file types that are acceptable. Parasolid, Iges, dxf, dwg, ai, psd, step(stp), ply, 3dm, stl, are all types that I can export to pretty easily.
Do any of those work for you?
I can do the design in Solidworks and export into any file type you want. Parasolid (.x_t) files usually work well in onshape.
Typically these contests come with a list of file types that are acceptable. Parasolid, Iges, dxf, dwg, ai, psd, step(stp), ply, 3dm, stl, are all types that I can export to pretty easily.
Do any of those work for you?
Hi Foued, unfortunately we're using Onshape for the training, so cannot use Solidworks
I can design it with Solidworks
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swoday07
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