Big wheels on a heavyweight

[woody]

Big wheels on a heavyweight

Onslaught was / is 0.4m Tall x 0.5m Wide x 1m Long with a good 80% of its weight in a central lump approx 25cm x 50cm x 40cm.
So Tanto is smaller by a good margin.

(Message edited by woody on March 18, 200

[craig_anto]

Big wheels on a heavyweight

Tantos actual body size is 30cm x 14cm x 35cm the rest is the front or wheels

[craig_colliass]

Big wheels on a heavyweight

NEW PICTURE!... BE SCARED!

[craig_colliass]

Big wheels on a heavyweight

OH yes the picture is on my profile

[swanaldo]

Big wheels on a heavyweight

Craig that looks just fantastic. I love it. when do we see it???????

[craig_colliass]

Big wheels on a heavyweight

I hope to run it at Burgess Hill but it will probably only be for White board fights, as its not quite battle ready. the problem is I only have one set of Spectrum radio and one speed controller between the two robots. so i would have to juggle things at the shows.

Good luck at Oldham win for baby Phoenix

[swanaldo]

Big wheels on a heavyweight

thanks craig.

[craig_colliass]

Big wheels on a heavyweight

Been testing Saint Hammer (I think thats what we will call it)smashing up bits of wood to get some target practice in. I cant practice on the drive much more I think Ive cracked it!!

Im hopeful I will be able to run it at the week end should be a scream

[craig_colliass]

Big wheels on a heavyweight

ive found this website selling batteries what do people think?http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=979http://www.batteryspace.com/index.as...ROD&ProdID=979

[woody]

Big wheels on a heavyweight

Have a good read of the specs ...particularly the discharge rate and wire size.

[maddox]

Big wheels on a heavyweight

Craig. 30 amps max for a pack.... I think I can show you what such a pack does in a high power 4WD 4 Graupner speed 900 driven FEATHER.

http://www.bugs.nl/media/album/view.php?&path=L3J3L2JydXNzZWwyMDA3L2JlLWJhYnMvV2V 0ZW5zY2hhcHNFeHBvXzA0MS5KUEc=http://www.bugs.nl/media/album/view....L2JlLWJhYnMvV2 V0ZW5zY2hhcHNFeHBvXzA0MS5KUEc=

http://www.bugs.nl/media/album/view.php?&path=L3J3L2JydXNzZWwyMDA3L2JlLWJhYnMvV2V 0ZW5zY2hhcHNFeHBvXzA0Mi5KUEc=http://www.bugs.nl/media/album/view....L2JlLWJhYnMvV2 V0ZW5zY2hhcHNFeHBvXzA0Mi5KUEc=

In other words, youll need at least 4 parallel in a heavy with a decent reduction gearing. And even then , even a good current limited speedo (like the current Sidewinder) will get those packs very very hothot.

[craig_colliass]

Big wheels on a heavyweight

Hi

Just thought I would give an update on the Big Wheeled robot,
Now named St Hammer.

The Hammer has had two outings now the first one was dogged with transmission failure this was due to me under estimating the forces on the final drive. Most of these failures have now been sorted, and the robot on its second trip out had no more problems. But I intend to strengthen these areas a little more to make the thing even more reliable.
The 3mm ARM steel has so far coped well with the collisions with only one dent!
The stub axle mounting bent when the Hammer was flipped out of the arena this took some straightening! I then re-enforced the areas with 3mm ARM steel in channel section, the stub axels are now secured through 9mm of ARM steel!
Now for the wheels themselves, I used 20€ bike tyres these have proved quite good, they are ripped to bits now, but the grip was amazing and I can get new ones for a tenner a pair. The wheels are made from 15mm UHMWPE this has proved a success, I may try some 12mm HDPE next, the reason is because I think a little more flex in the wheel may help save the stub axle problem from returning, and some robots with crushing weapons tends to put holes in the wheels and HDPE is weld able. So when the inevitable happens I can fix this.
The hubcaps work well to self-right the Hammer if it gets stuck,
The only disappointment is how hard I have found it to drive and deploy the weapon at the same time; this is not the fault of the robot but the driver!!!

Still the audience seem to like St Hammer, and so do team Bad Bolts.

[swanaldo]

Big wheels on a heavyweight

and so do team bud

[craig_colliass]

Big wheels on a heavyweight

I have just been testing out the robot and I found a fault with the control when the robot has been used for a little while the robot looses power on full left turn the robot stops moving if I go to 9/10 left on the stick the robot works it just has a dead patch there.
But only after a while first thing its ok and if I leave the robot then go back after a short while it is ok again I don€™t think it is a radio fault I think it is the speed controller not interpreting the signals correctly when it gets warm.
I have adjusted the travel on the aileron control the one in question, between 100% to 150% this has made no difference. The radio is spectrum DX6 and the controller is Sidewinder,

what do people think?

[woody]

Big wheels on a heavyweight

I think youll find that there is a + AND - travel adjustment ...check that you have 100% on EACH .
http://www.spektrumrc.com/ProdInfo/Files/DX6_Maunal.pdfhttp://www.spektrumrc.com/ProdInfo/Files/DX6_Maunal.pdf
Page 11


Tried recalibrating the Sidewinder to the Spektrum stick range ..... http://www.robotpower.com/downloads/RobotPower_Sidewinder_quickstart.pdfhttp://www.robotpower.com/downloads/...quickstart.pdf
Page 2 Radio Calibration?