Welcome one and all to the Ossum Racer design discussion!
If you haven't seen it yet I'd encourage you to take a look at my first blog post, it is a good (I hope!) introduction to who I am and what I'm up to!
I will be posting blog posts of my design process at each interesting step, but along the way I'd love to engage with all of you good denizens of the forum, so if you have questions I will try to answer them here.
When we get to the stage where I have files to share then this forum will be a great place to discuss your prints of them.
In the meantime, if you'd like to see my previous printable projects then take a squizz at the links below, they will also be where I will be posting the files for this project as I release them
If you prefer social media to forums then you'll be able to find me here:
Hi @ossum these models look amazing. Nice work. I look forward to hearing more about your model designs.
Are you using a Robox printer currently?
Thanks @hagster!
I am not using a Robox at the moment, but will be once I get deeper into the design phase of this project. I am really excited to get started. There are a few features that are of real interest to me, not least of all the option to print in Nylon, I think that is going to open up some interesting design options.
The dual materials are also something that I have thought a lot about in the past, so that will be interesting to experiment with. I've been messing around with TPU a lot recently and I am curious to see what can be achieved by being able to print, for example, a composite PETG/TPU part.
The dual materials are also something that I have thought a lot about in the past, so that will be interesting to experiment with. I’ve been messing around with TPU a lot recently and I am curious to see what can be achieved by being able to print, for example, a composite PETG/TPU part.
Hi Ossum, Do you mean something like this (below). The yellow wheel is ColorFabb CO-PET and TPU and was my first attempt. The grey one is PLA/TPU.
I found the TPU sticks to the PEI bed so well it is really hard to remove when the print is finished. Using a PLA brim made it easier to get off.
Hi Kevin, seems I had forgotten to enable notifications for this thread.
Anyway, yes that is one of the things I was interested in. I have done tyres in TPU before, but they are easy enough to do separately to the rim with a single extruder.
I feel like there are some interesting options when you have a dual extruder that aren't possible with a single, but I'm not sure yet, I'll be inspired once start playing with one ;-)
As a silly example, take a look at this flexible track I made in TPU recently, with a dual extruder one could use a hard material for the plates and a flexible material for the "hinges" between each one.
New post is up, I'll be interested to hear you thoughts so far!
New post up, this time designing a functional differential.
There is a video too, in case the blog is too wordy ;-)
I printed an early prototype design of this in nylon 12 on a standard Robox with SM head and it came out great, it is really easy to print thanks to good design.
Really looking forward to seeing the progress on this.
For official support please create a support ticket using this link www.cel-robox.com/support/
Sounds great Pete, I look forward to seeing it!
I have been busy tweaking the design of the outer housing now to add mounting holes for the the axle tubes on either side as well as splitting it in what I hope is a more sane fashion. This should avoid the tolerance and warp issues I had before, as well as allowing the cover to be removed without removing the axle tubes that will eventually bolt to the side (useful for adding grease, replacing gears, etc)
I've fired up the printer and set it to work, so hopefully when I wake up I will have another ABS prototype to test! All the gears etc are still identical.
Once I've designed axle shafts I will be able to stick it under and RC car and exercise it a bit.
That casing design looks much stronger and easier to print, nice one.
Still need to find a shaft for the inside but I will post a photo once I get it together.
because it is friday
For official support please create a support ticket using this link www.cel-robox.com/support/
I've created a "collection" on myminifactory which has all the useful assemblies as I go along in case anyone wants to play with them, you can find it here
Today I'm printing the ABS housing for the transmission I finished designing last night, with any luck I'll be able to do a little test of the complete drivetrain before the weekend! I'm thinking I can strap the whole lot to a board with wheels on the front or something and do some hard launches, see how the gears handle it.
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