Team Microbots Build Diary

[Revsmin]

Re: Team Microbots Build Diary



I'll just leave this here
Thanks to Mario for making them!

[Eventorizon]

Re: Team Microbots Build Diary

I have always wanted to make my drive wheels like that! Is that what is going in Skyfall or in the 6WD pusher?

[Revsmin]

Re: Team Microbots Build Diary

These are for Skyfall. The 6WD pusher (Ricochet) will use six 18v Gimsons on a 22.2v LiPo.

[Ellis]

Re: Team Microbots Build Diary

So THAT'S their destiny! Awesome! I have watched their progress over the past month or so and they are indeed very nice.

[Revsmin]

Re: Team Microbots Build Diary

BotBitz ESCs arrived, material being cut soon!

[Revsmin]

Re: Team Microbots Build Diary

Update:


She is a lot smaller than before!

[Eventorizon]

Re: Team Microbots Build Diary

Looking good. I can see you have moved the wheels so she won't steer like a pendulum. Have you solved the battery problem yet?

[Revsmin]

Re: Team Microbots Build Diary

The battery-flying-out-and-hitting-the-polycarb problem came about because the person responsible for making the brackets ingnored my instructions and only made them for widthways on the battery rather than widthways and lengthways, as a result, it slid out when the robot self-righted.
Anyway, I rigged up Ricochet for it's first test run:
http://www.youtube.com/watch?v=CZh1pSYRiHU
Only a quick test run. It's running on the two old 5000mAh 12v NiMHs in the video, it will be upgraded to a 3S LiPo for the champs so it will run faster and have more torque. She has more ground clearance than before, so she won't get stuck on eveything. The rest of the parts (including all the 30mm HDPE bulkheads) are cut and ready to bolt on, but due to a calculation error, the motors need adjusting to fit it all on. There are plans afoot to make 3.2mm Hardox scoops for both ends before the champs, and also plans to upgrade the motors to 18v Gimsons GR02's and run them on a 6S LiPo. It will be crazy fast and have insane pushing power, and that's what the aim of the robot was in the first place!
PS. Someone fix that damn YouTube embedding problem, it's driving me mad!

[Eventorizon]

Re: Team Microbots Build Diary

There are plans to upgrade the motors to 18v Gimsons GR02's and run them on a 6S LiPo.

If you have built it around GR01's you will struggle to get the GR02s to work without changing so much you may as well make a new machine.

I wanted to do that in Conker but not only are the mount holes completely different but as its 5mm thinner in each direction the wheels would no longer sit along the central plane of the robot.

We changed to GR02's in Binky and I have had to resort to 3D printing custom brackets top make up for all the inconsistent reference points.

Besides a 6WD 24V GR02 machine is on my build list so hands off

[Revsmin]

Re: Team Microbots Build Diary

Besides a 6WD 24V GR02 machine is on my build list so hands off

http://www.youtube.com/watch?v=eSCcIv_dLlg

[Ellis]

Re: Team Microbots Build Diary

Do be aware that you run the risk of killing the gearboxes if you overvolt. It's not as extreme as our overvolting was, but 18v motors have way more torque at nominal voltage; the pins are likely to fail!

[Revsmin]

Re: Team Microbots Build Diary

Gimson GR-02 motors are rated at 6-25v. Failing that, they do sell 24v ones.

[Ellis]

Re: Team Microbots Build Diary

By pins I don't mean the motors, the motors themselves will take 6s no problem, I mean the subsequent power they will put out will most likely cause the gearboxes to fail. This type of gearbox has plates that have pins on them, on which the gears spin. The second set of pins are under major stress from the torque of a motor, and in our experience (and endless examples of the same over the years) the monstrous torque produced by an overvolted motor causes them to loosen and literally fall out of their position. 8/10 times this will lock up the gearbox, quite possibly strip several gears, and if the motor continues to receive power for long after being unable to move it will burn out.

If more speed is what you're after, I'd recommend doing the conversion of 36:1 to 24:1.

[Revsmin]

Re: Team Microbots Build Diary

If more speed is what you're after, I'd recommend doing the conversion of 36:1 to 24:1.

No need, I intend to buy 24:1 GR02s.

[RogueTwoRobots]

Re: Team Microbots Build Diary

PS. Someone fix that damn YouTube embedding problem, it's driving me mad!

What embedding problem? :P

http://www.youtube.com/watch?v=CZh1pSYRiHU