Thanks!
On the third video on the project page, you can see a demo with a 3kg mass moving 80cm.
Yeah, step/direction input will be, by popular request, the the first available interface to control ODrive.
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Thanks!
On the third video on the project page, you can see a demo with a 3kg mass moving 80cm.
Yeah, step/direction input will be, by popular request, the the first available interface to control ODrive.
Well yes, I saw that video. However, I am wondering if it has been tried on a larger machine. A 3 kg mass on linear rails is still really nothing compared to what I am talking about. I'm considering trying it on my milling machine so I am talking more like a 40-50 pound mass moving vertically at at least 200 inches per minute. It is driven by a ball screw, but rides on dovetail slides which will have considerable more friction that linear rails. Has anyone attempted anything like this?
I do not share your optimism. If all you are running are 2 mm cutters into timber, that's fine. But try running a 2" face mill across steel and see what forces are involved. Or try running a 1/2" drill into steel.Quote:
I already plan to do automatic machine mass/friction identification, and to use model based feed-forward for most of the control action. So it should be possible to look at the tracking error to identify if there are any major disturbance forces, and hence take action.
There is a reason why larger machines have larger motors - and safety doors.
Cheers
Roger
I will be facilitating a couple of production runs at different stages of maturity of the project. I expect that the early prototypes will be around $100, and with a larger run later on will be closer to $50. You can check out the details, and sign up for a board at any stage, here: https://hackaday.io/project/11583-od...nd-development
https://cdn.hackaday.io/images/2665861480778750936.jpg
The time has finally come for the manufacturing run of ODrive v3.1. They are now on the way, and should arrive early to mid January.
At this stage, around 20 board kits are going out the people who signed up to the "Inital development" phase. They have not been all allocated yet, you can signup here.
Since the boars are going out to just a small group of early developers, I will have the time to personally get you up to speed with the codebase and help to get going with the hardware. Then, together, we can prepare some stuff that is a bit more stable and a bit more documented for when the alpha testing begins.
The cost for me to get this small batch of boards manufactured was $96 per board, so that is the amount I need to ask for a kit, plus shipping.
The kit involves basically everything seen in the above picture, and consists of:
- ODrive v3.1
- USB Programmer
- A set of the optional large gauge wire screw terminals
- A set of pin headers
- Some nylon standoffs
I hope that ODrive will be able to help you make an awesome robotics project, thank you so much for your contribution to helping people have access to open robotics hardware and software.
Is it just me or is $96.00 for a kit a little pricey based on what is provided?
It's a shame eagle files aren't available, I'm almost certain my friend could have this board made and populated for $50.00 or less each in a small quantity like 50pcs.
The design is available on GitHub, CircuitMaker, and CircuitHub. Please let me know where you looked and failed to find the links, and I will put the links there.
The price is quite high, I agree. This is because I used a turnkey professional manufacturer, CircuitHub, and only did a run of 28 boards. If your friend can have the boards made for less, that would be fantastic for the project.
Please let me know if you, or your friend, would be willing to help with that.
Cheers,
Oskar
I guess you didn't understand what I was saying.
Your schematic and PCB layout file are not usable by my friend, he only works with eagle files and wont waste time trying to convert the ones you have.
He has a preference for Version 6.3.0 but can accept Version 7.x if you have a licensed copy to generate unrestricted files.
If you need a licensed version of eagle so you don't have any board restrictions, this can possibly be arranged.
What this means is if you can't give me the schematic and PCB layout files in eagle format i wont be able to have my friend make the boards but he did estimate cost to be around $46.00 each (based on parts and board size) for a quantity of 50pcs and less on larger quantities.
Your schematic and PCB layout file are not usable by my friend, he only works with eagle files and wont waste time trying to convert the ones you have.
Tough.
The world will not dance to your tune. The plans are FREE, for heavens sake!
Cheers
Roger