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Messages - Darkwynter9

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SCRC (Saskatoon Combat Robotics Club) / Re: New to Combat Robotics
« on: April 04, 2018, 01:26:35 pm »
Aluminum is generally used as an ablative armor, so it performs the same function as UHMW. If you wanted something that would deflect hits to cover the UHMW, titanium or hardened steel are probably better. There really isn't much need for that, though. Many of us just use UHMW as armor on its own.

If you want to go with a UHMW unibody you'll need to know how to use a CAD program like Fusion, Inventor, or SolidWorks. If you have a CAD program and can design the chassis, I can help you with the rest. Saskatoon TechWorks has a CNC machine that does a great job on UHMW, and it's free for members to use. I'm a member there, so I can help you design toolpaths and learn how to operate the machine. If you want to pass on CAD for now and design on paper, then you'll probably want to go with a bolt together frame rather than unibody. I use a bolted together UHMW chassis for one of my 3lb drum spinners and a bolted together aluminum chassis for the other two.

For the drum, Sgt. Cuddles uses a direct drive drum, which is probably not something you'd want to make on your own for your first bot. Kitbots sells an off the shelf direct drive drum that's probably an easier solution. They also provide a chassis and internal parts for it if you want to start competing before finishing your first original design. FingerTech Robotics is another option. They sell a belt drive beater bar and all the accessories you'd need to get it running. And they're conveniently located in Saskatoon so you don't even have to pay shipping.

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SCRC (Saskatoon Combat Robotics Club) / Re: New to Combat Robotics
« on: April 02, 2018, 02:56:47 am »
Sgt. Cuddles is a pretty solid design, so you're good there. My suggestions revolve around your material choices. Aside from the thin sheets that FingerTech Robotics sells, titanium is very, very expensive. Almost all drums in the 3lb class are made from aluminum for cost reasons, and they often last years without needing to be replaced. Aluminum for the chassis is a fine choice, but if you mimic Sgt. Cuddles exactly (which is a unibody design), it'll again be pretty pricey. I'd suggest either using the same material as Sgt. Cuddles (UHMW, which actually holds up great on 3lb robots) or change the design slightly to use multiple flat pieces of aluminum plate joined by screws rather than machining it all from a single billet. The SCRC Kilobots builder's Facebook page is probably worth joining too, and by far the best place to get help is at one of our events. The next one is at the Saskatoon Mini Maker Faire on May 26th. Everyone is super friendly and helpful, and some of the Kilobots members have been fighting robots for a ridiculously long time and have tried pretty much everything.

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: July 27, 2017, 11:34:03 am »
Travis, let me know if you want a big magnet for the light. I can give you one along with that carbon fiber (which I haven't forgotten about).

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SCRC (Saskatoon Combat Robotics Club) / Re: Parade Plans
« on: July 25, 2017, 03:34:50 pm »
I was hoping to build something flashy around the chassis of the 60lber I bought from Dirk, but unfortunately it turns out I won't be able to make it at all this year. :(

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 27, 2017, 10:59:37 pm »
I looked into bed liner more, and yeah, I didn't realize how easy it is to just cut it off unless you get the really pricey stuff that has to be applied at a special shop, so that's not a good idea.

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 25, 2017, 03:46:06 pm »
Would truck bed liner be better than paint for the arena floor? For the steel floor, it's tougher than paint, and if/when we do switch to stainless, bare non-hot-rolled metal is super slippery, so some extra traction might be nice. It also looks nice and matte on camera.

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 24, 2017, 11:24:58 am »
Not arena related, but just so it doesn't get lost on Facebook or forgotten - the official scale might be magnet damaged. It seemed to weigh about 1g heavy per lb which isn't necessarily a problem, but on one attempt to weigh Scary Thing it gave a reading 20g low.

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 22, 2017, 09:54:17 pm »
I can't promise they'd come out dead straight, but I could give my best shot at hardening the existing hazard shafts if the other option is just to scrap them anyway. Also, I'm still happy to donate my SM57 for the in arena mic.

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 21, 2017, 05:36:33 pm »
Would hardening the hazard shafts be easier than embiggening them?

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 21, 2017, 04:56:21 pm »
It's Brandon Wiebe. I've had this account for a while, but I guess I hadn't posted yet. I have no objection to stainless even if it eliminates magnet use. I just was wondering whether I'd need to modify the new chassis for Scary Thing or just make it the same. If stainless is still a pipe dream for the moment then I'll go ahead with it as is.

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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« on: June 21, 2017, 03:24:41 pm »
Stainless on top of the old floor or just stainless?

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