New FW database (new robots)

[knightrous]

Re: New FW database (new robots)

I'm looking at going to 3 wheel brushless in the future with MBX, but I'll be looking towards a wobbly wheel setup like Y-Pout has. The reason I want to use a mechanical method for the translation is that with the pulse based electrical method of turning the motor off to translate, your reducing the motors duty cycle and degrading the power you get from the motors. I want to run a solution where the motor run at full speed all the time to provide the maximum power and torque. Also, the faster you go with the electronic method, the slower the translation speeds due to the smaller amount of time off time you can produce, the mechanical method should produce close to proportional faster translation as you increase the RPM.

The mechanical version does have the draw backs of coming up with a reliable way of doing it

[craig_colliass]

Re: New FW database (new robots)

Ian (from Team Weird Alice) the feather Chassis is looking good is this your first feather, what type push robot or flipper?
I am making a feather too, I expect it to break into bits the first event it goes but if you don't try you never know!
I have decided to go down the Heavenly or Angelic naming route so my new robot is going to be called Seraphim. Got a name for Little Alice.

[ian_humphrey]

Re: New FW database (new robots)

Craig,

Yes, it is the first feather for me. I'm making this to learn how to work with polycarb, so it's initially it's going to be a push bot but if it works okay I'll modify it and add a weapon of some sort. Hopefully, I'll have it ready for Swindon. As for a name, since I have partly built this for Sarah, my daughter, to use she'll be naming it.

Ian

[Metal Demons]

Re: New FW database (new robots)

I'm looking at going to 3 wheel brushless in the future with MBX, but I'll be looking towards a wobbly wheel setup like Y-Pout has. The reason I want to use a mechanical method for the translation is that with the pulse based electrical method of turning the motor off to translate, your reducing the motors duty cycle and degrading the power you get from the motors. I want to run a solution where the motor run at full speed all the time to provide the maximum power and torque. Also, the faster you go with the electronic method, the slower the translation speeds due to the smaller amount of time off time you can produce, the mechanical method should produce close to proportional faster translation as you increase the RPM.

The mechanical version does have the draw backs of coming up with a reliable way of doing it

I'd be inclined to say that by reducing the duty cycle you allow yourself to overvolt the motor even more, thereby getting the same average power output ;-)

[froggy]

Re: New FW database (new robots)

NEW FOR 2009
Name : King Rat
Weight : ????
Drive: 2 X 35w boshe with metal gears
Power : 2 x 3700 tornado @12v
Weapon : Electric flipper / lifter
Control : Scorpian XL
Armour : 2mm stainless steel
Constuction : 6mm aluminium plate

Basicly a scaled up version of johnnos pay to drive ratz

Cheers Froggy

[craig_colliass]

Re: New FW database (new robots)

Ian

I€™m looking forward to seeing it in action. I found for cutting the Poly a wood saw from Argos was best, and to de-bur the cut I found rubbing an old 12€ steel rule along the edge did the trick!
Mine wont be ready for Swindon but should be ready for Guildford if I can get the spare funds for the Battery packs and the DX5 radio.

See you guys at Swindon

[craig_colliass]

Re: New FW database (new robots)

The Mighty Seraphim 95cm wide 105cm long 50cm high, and it€™s a featherweight!!!

[geoff]

Re: New FW database (new robots)

The Mighty Seraphim 95cm wide 105cm long 50cm high, and it€™s a featherweight!!!

How big Craig?? :shock: ...and you claim it's a feather! ...I gotta see this on a set of scales. :wink:

[craig_colliass]

Re: New FW database (new robots)

The weight should be well in the limit!
I hope to bring the Work in progress to Swindon so you can
SEE AND BELIEVE

Be prepaired for the sword of Nemesis :shock: :shock:

[knightrous]

Re: New FW database (new robots)

I'd be inclined to say that by reducing the duty cycle you allow yourself to overvolt the motor even more, thereby getting the same average power output ;-)

More batteries = more weight I'm currently using this method to get more power and speed, I stepped up from 19.8v to 39.6v and I'm starting to limit of the motor (12v motor @ near 40v). If I could run that motor at full power all the time, I could get away with probably 26.4v instead to get the same power.

Hmm, maybe we need a Melty Brain thread instead of OT'ing this thread:P

[Metal Demons]

Re: New FW database (new robots)

I'd be inclined to say that by reducing the duty cycle you allow yourself to overvolt the motor even more, thereby getting the same average power output ;-)

More batteries = more weight I'm currently using this method to get more power and speed, I stepped up from 19.8v to 39.6v and I'm starting to limit of the motor (12v motor @ near 40v). If I could run that motor at full power all the time, I could get away with probably 26.4v instead to get the same power.

Hmm, maybe we need a Melty Brain thread instead of OT'ing this thread:P

http://www.fightingrobots.co.uk/foru...p?f=111&t=2710

[craig_colliass]

Re: New FW database (new robots)

A pic for you to see

http://s569.photobucket.com/albums/ss13 ... GA4933.jpg

http://s569.photobucket.com/albums/ss13 ... GA4935.jpg

Hope they are of intrest

[RogueTwoRobots]

Re: New FW database (new robots)

Lmao, epic
Nice work Craig. What motors are driving it?

[craig_colliass]

Re: New FW database (new robots)

MFA 975D these are 12v motors (running at 14.4v) Motor dia aprox 45mm they are coupled to all metal planetary gearboxes so final drive speed will be aprox 80rpm to 500mm dia wheels!

I hope the weight should be around 12.5Kg with out the batteries they weigh about 900g so I should be ok.

[ian_humphrey]

Re: New FW database (new robots)

Nearly completed, just need to clean up the edges, due to my dodgy cutting, fit an LED and it should be ready to get beaten up.

All it needs now is a name.

http://www.weirdalice.co.uk/Nearly%20Complete.jpg