June 27, 2017, 04:36:44 pm
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Progress Reports / Re: Revelation Robotics
« Last post by Green machines on Today at 11:47:43 am »
Hey. The NERC Franklin registration is open on builders database. The sportsmans class still has some open spots left.
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Progress Reports / Re: Team Brain Damage
« Last post by zacodonnell on June 26, 2017, 10:32:46 pm »
I made a little more progress tonight. I got the holes on the end of the shuttle tapped and the screws installed. I also made a couple little pockets on the nut that the tips of the shoulder bolts sink into so that it can't get misaligned. I'm happy with how the whole mess turned out.  It lines up great in the bot and runs very smoothly. I added the return springs quickly with some zipties just to see how well it picks up the last thread if I reverse the motor by hand. No problem at all - even with the maximum misalignment from the springs it picks it up easily. I hope that means the trigger side will work well at high speed too. The trigger side alignment should be much better because the trigger arms push evenly on both sides of the shuttle.

I probably won't get back to it until Wednesday. Next up is the arm standoffs and hinge pins, then I'm ready to rig it up to a test baseplate and controller and give it a shot. I'll need to make an adapter for the connector on my 60A controller because it has 3mm bullets and this motor uses 4 or 5mm (can't remember, but they're way bigger) Fingers crossed!

-Zac
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Progress Reports / Re: Team Brain Damage
« Last post by zacodonnell on June 26, 2017, 06:52:13 am »
To quote my high school calculus teacher:
     
     "If some is good, more is better"

I'm pretty sure he was talking about homework though.  In this case The dimensions of the system just worked out that I could add a big motor that I had on hand so I figured why not.  If I put a little motor in there and swapped the screw for a slower one I'm sure it would make a decent lifter, but I'm trying to hurl robots to the ceiling so more motor is better.  If I blow up the weapon controller with it then maybe I'll reconsider, but for now I think it'll be fun!

-Zac
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Progress Reports / Re: Team Brain Damage
« Last post by zacodonnell on June 26, 2017, 06:49:57 am »
To quote my high school calculus teacher:
     
"If some is good, more is better"

Now if
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Progress Reports / Re: Team Brain Damage
« Last post by rcjunky on June 26, 2017, 04:27:39 am »
do ya think that much weapon motor is needed or is that just what ya had on hand?
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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« Last post by Travis7s on June 25, 2017, 10:21:15 pm »
Never used truck liner but isn't it usually applied pretty thick, and then could craters form if it gets ripped up at all? Also need to make sure paint can stick to it as well.
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Progress Reports / Re: Team Brain Damage
« Last post by zacodonnell on June 25, 2017, 09:35:36 pm »
More progress today, though I didn't quite reach my goal of getting the weapon assembly finished this weekend. I didn't really expect to, but you've got to aim high, right?  I got the rails, motor, adapter hub, lead screw, and bearings all completely finished. I might rework the coupling between the lead screw and adapter hub but I'll go with this until I can test the whole thing.  I also got the shuttle about 80% of the way there. I still need to tap and install the hinge bolts on the ends. I'm one bolt and one 10-24 tap short on that project. The bolt is in the mail (probably coming in Tuesday but I've been surprised by Mcmaster before. I'll pick the tap up at Home Depot tomorrow. Not worth ordering just a single 10-24 tap when I almost never use it anyway.

I'm really looking forward to testing the engagement stuff. The lead screw feels very smooth and the nut goes on and off very easily by hand.

Pictures
https://plus.google.com/photos/107279152885550274671/album/6433529956027270705/6435752470254798770

-Zac
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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« Last post by rcjunky on June 25, 2017, 07:34:22 pm »
I've got a 200g calibration weight I can bring in september. I figure I'd make my bots weigh in correctly to it so I shouldn't need to worry about scale discrepancies. They are pretty cheap though, I think I got mine on amazon for around $5. I'm not hardcore enough though to only handle it with tweezers or gloves though :P
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SCRC (Saskatoon Combat Robotics Club) / Re: SCRC Arena Upgrades 2017
« Last post by Darkwynter9 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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