gametechmods

Off-Topic => Real Robotics => Real Robotics Discussion => Topic started by: Wolfsbane on April 16, 2011, 09:29:27 AM

Title: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 09:29:27 AM
i got $250 U.S. dollars to build a 3-pound Beetleweight robot, and i'm using the robot market place, and i'll show you what i need

Armour : Polycarbonite (FREE)
Speed Contrlorrer : Sabertooth 5 ($60)
Radio package : GWS (about $100)
Motors: Spare Taymia motors ($6 for 2)
Wheels : i forgot the name (about $4 for 2-pack)
Battery for Sabertooth: Custo0m Made Battery ($15)
Battey for reciever : Custom made battery ($5)
X2 battery charger ($30 for 2)
Fastners ($10)

Is this what you would recommend?
Title: Re: Team Fox/ i could use some help
Post by: JoeBlo on April 16, 2011, 09:31:58 AM
Not sure if Zip is around much but he would put in the right direction straight away for breaking into the US BW class..
Title: Re: Team Fox/ i could use some help
Post by: Badnik96 on April 16, 2011, 09:33:40 AM
No, the best stuff isn't on the Marketplace. THere's some better motors and stuff out there. Check out this thread:

https://gametechmods.com/forums/index.php/topic,4104.0.html (https://gametechmods.com/forums/index.php/topic,4104.0.html)

It should steer you in the right direction.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 09:36:23 AM
i'm going to throw in my design, btw, the weapons free


  ____________________
 /                                     /___________+
/__________________/


pretty much the chasis of rammstien, but a flain at the back instead of a spike

EDIT: those kind of stuff put me overbudget, and even though they might be better, i only got $250, and i can't solder.
Title: Re: Team Fox/ i could use some help
Post by: kill343gs on April 16, 2011, 10:05:04 AM
You're gonna need to learn to solder... Google it, it isn't hard.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 10:12:49 AM
well, i guess i COULD learn, but answer me this, how much money in us dollars did you spend on those parts?
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 10:18:39 AM
Instead of two custom made batteries buy a BEC
http://www.dimensionengineering.com/sportbec.htm (http://www.dimensionengineering.com/sportbec.htm)

Those Taymia motors are crap. Check these out. http://kitbots.com/product.sc;jsessionid=7BCFD6DC84954620A6CC653651849C89.qscstrfrnt01?productId=20&categoryId=1 (http://kitbots.com/product.sc;jsessionid=7BCFD6DC84954620A6CC653651849C89.qscstrfrnt01?productId=20&categoryId=1)

They are a little more expensive but they are great and you can also get mounting plates for them.


Also you are going to need to learn how to solder.

Title: Re: Team Fox/ i could use some help
Post by: Jack Daniels on April 16, 2011, 11:34:49 AM
well, i guess i COULD learn, but answer me this, how much money in us dollars did you spend on those parts?

Dude, Soldering is soooooo easy.  And you can pick up a basic soldering hobby kit for cheap.  If you learn how to solder leads onto motors and bridge battery cells, your life will be so much easier. It's also a great skill to learn if you get into the RC car hobby as well.  What state are you located in & do they have robot competitions near there?
Title: Re: Team Fox/ i could use some help
Post by: haz on April 16, 2011, 11:46:47 AM
tamiya motors? pah, i spit on them, they are useless!
robot marketplace if often too expensive for what it is, try other websites and try other forums that will be more geared towards combat robots, normaly people have odds and sods lying round that you could have cheaply.
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 11:49:33 AM
Armour : Polycarbonite (FREE)(Good choice, but make sure its real polycarbonate, plexy glass is often confused for it, and will shatter like, well, glass. You should also chemically weld it together, you'l have armor that will be nearly unbreakable.)
Speed Contrlorrer : Sabertooth 5 ($60)(Nice choice)
Radio package : GWS (about $100)(Its a very basic radio, your going to waste your money that won't work. For the same price, you could get the Spektrum DX5e, which would be a much better radio. Just remember that the AR6110 is going to put you a bit over budget.)
Motors: Spare Taymia motors ($6 for 2)(Those seem awfully small to drive a beetle around.)
Wheels : i forgot the name (about $4 for 2-pack)(I'm guessing these are lite flights. Your going to need hubs, they don't bolt on to the shafts.)
Battery for Sabertooth: Custo0m Made Battery ($15)
Battey for reciever : Custom made battery ($5)(A BEC is much better and wont add to much weight, but might be a bit more pricey, but it's going to total how much you would pay for another switch, RFL rules require a switch between all power sources.)
X2 battery charger ($30 for 2)
Fastners ($10)

Is this what you would recommend?
My thoughts hi-lighted in red.
Title: Re: Team Fox/ i could use some help
Post by: haz on April 16, 2011, 11:53:37 AM
most sabertooths have a built in bec
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 11:56:26 AM
can i ask u guys about spektrum? it's mostly for airplanes, so is it

A: 1 channel for 1 motor, or
B: 1 channel for front and back, and the other for left and right?
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 12:01:58 PM
You can't drive a tank drive robot unless you have two channels.

Spektrum remotes have a ratchetring left stick (good for RC airplanes) and a springloaded right stick that always recenters itself. Most people drive only with the right stick because if this. If you have a ESC that has mixing (which you do) it's not a problem because one channel will control forward/backwards and the other channel will control left/right.
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 12:02:09 PM
Most of the Spektrums do have mixing, as in for forwards and backwards, left and right on one stick.
Edit: Ninjasked.
Title: Re: Team Fox/ i could use some help
Post by: haz on April 16, 2011, 12:08:59 PM
spectrums are brilliant, fact been using a hitec ranger 3 for years then i got a dx5e changed all my robots to 2.4ghz within a fortnight
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 12:15:38 PM
It's about $110 for a Spektrum DX5e with AR500 receiver combo at robotmarketplace. So if you buy a Spektrum you save $3 of the GWS which costs $113.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 12:34:10 PM
for the AR500 receiver, do i need a seprate battery?
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 12:39:59 PM
Your Saber tooth already has a BEC, it does not need another battery.
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 12:41:54 PM
If you have a 5v input you don't need a separate battery. That's why I said get a BEC. I'd tell you how to make one from parts you can get a radioshack but because you can't solder it won't be much help. :P
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 12:42:57 PM
so my battery powers my sabertooth, which powers my receiver?
Title: Re: Team Fox/ i could use some help
Post by: zipdragon64 on April 16, 2011, 12:47:10 PM
your sabertooth has a Battery Emitting Current (BEC) when you pug it into your reciever it supplies the 5v it needs
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 01:04:25 PM
should it wire up like this?

(https://gametechmods.com/uploads/images/64695untitled.PNG)
Title: Re: Team Fox/ i could use some help
Post by: haz on April 16, 2011, 01:14:29 PM
basicly yes
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 04:08:43 PM
Armour : Polycarbonite (FREE)(Good choice, but make sure its real polycarbonate, plexy glass is often confused for it, and will shatter like, well, glass. You should also chemically weld it together, you'l have armor that will be nearly unbreakable.)
Speed Contrlorrer : Sabertooth 5 ($60)(Nice choice)
Radio package : GWS (about $100)(Its a very basic radio, your going to waste your money that won't work. For the same price, you could get the Spektrum DX5e, which would be a much better radio. Just remember that the AR6110 is going to put you a bit over budget.)
Motors: Spare Taymia motors ($6 for 2)(Those seem awfully small to drive a beetle around.)
Wheels : i forgot the name (about $4 for 2-pack)(I'm guessing these are lite flights. Your going to need hubs, they don't bolt on to the shafts.)
Battery for Sabertooth: Custo0m Made Battery ($15)
Battey for reciever : Custom made battery ($5)(A BEC is much better and wont add to much weight, but might be a bit more pricey, but it's going to total how much you would pay for another switch, RFL rules require a switch between all power sources.)
X2 battery charger ($30 for 2)
Fastners ($10)

Is this what you would recommend?
My thoughts hi-lighted in red.

i'm pretty sure it's real polycarbonite, it's coming from my mom's boyfriend, and he works with plastics, metals, the whole works.

thanks

i'mm getting spektrum instead thanks to some help

i'm getting diffrent motors since evryone is complaining

there not lite flites, there more offroad style

still getting custom battery

no reciever battery, since i found out it has a bec

only 1 charger now

same fastners

that's my replies in the same order
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 07:42:29 PM
Sorry for the DP, but is this a good shopping list so far? *WARNING: BIG PIC AHEAD*


Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 08:52:40 PM
Those motors are very slow, and very under powered for an beetle. You should go for the B-16 instead, it's made to be used in a beetle weight, though your going to need hubs.
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 09:10:50 PM
I told you to check out those motors I posted before. Two of them are great in weaponed beatleweights and four would kick butt in a pusher. Also with 3" wheels it would get around 8mph (rough mental math estimate) which is more than fast enough for a Beatleweight in a 8' X 8' arena. But if you don't want to cough up the extra $12 to buy them and have a underpowered bot feel free to do so. Also you don't need a switch per say. I use a removable power link in my 30lber. That's a fancy name for unplugging the battery and plugging it in right before the match. :P


Edit: http://kitbots.com/product.sc;jsessionid=F477ACD531DA7221708C8104829FC4CD.qscstrfrnt06?productId=20&categoryId=1 (http://kitbots.com/product.sc;jsessionid=F477ACD531DA7221708C8104829FC4CD.qscstrfrnt06?productId=20&categoryId=1)
These motors are better than the ones you have in your screenshot and are cheaper. $12 VS $19
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 09:17:23 PM
I told you to check out those motors I posted before. Two of them are great in weaponed beatleweights and four would kick butt in a pusher. Also with 3" wheels it would get around 8mph (rough mental math estimate) which is more than fast enough for a Beatleweight in a 8' X 8' arena. But if you don't want to cough up the extra $12 to buy them and have a underpowered bot feel free to do so. Also you don't need a switch per say. I use a removable power link in my 30lber. That's a fancy name for unplugging the battery and plugging it in right before the match. :P


Edit: http://kitbots.com/product.sc;jsessionid=F477ACD531DA7221708C8104829FC4CD.qscstrfrnt06?productId=20&categoryId=1 (http://kitbots.com/product.sc;jsessionid=F477ACD531DA7221708C8104829FC4CD.qscstrfrnt06?productId=20&categoryId=1)
These motors are better than the ones you have in your screenshot and are cheaper. $12 VS $19


My parents said i can only get the parts from Only 1 store!
should i get a faster motor for my robot?
Edit: does a Spektrum AR500 reciever do Futaba or JR plugins?
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 09:28:45 PM
Tell your parents Alex from Team CWG told you to get different parts because the current ones you. Want will be a waste of money. Tell them the same things I've told you and make sure to tell them it's cheaper. If you can't convince them to let you get the other motors here is a more expensive alternative.  http://www.robotmarketplace.com/products/0-B16.html (http://www.robotmarketplace.com/products/0-B16.html)


Spektrum 2.4GHz is only Spektrum .4GHz compatible.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 09:35:25 PM
Tell your parents Alex from Team CWG told you to get different parts because the current ones you. Want will be a waste of money. Tell them the same things I've told you and make sure to tell them it's cheaper. If you can't convince them to let you get the other motors here is a more expensive alternative.  http://www.robotmarketplace.com/products/0-B16.html (http://www.robotmarketplace.com/products/0-B16.html)


Spektrum 2.4GHz is only Spektrum .4GHz compatible.

That motor is backordered  :embarr
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 09:55:34 PM
Try the PK-17. It's a bit big, but with lexan armor it should be fine with lite flights.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 09:57:37 PM
can u get me a link?
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 10:00:21 PM
Here ya go:
http://www.robotmarketplace.com/products/0-BPK27.html (http://www.robotmarketplace.com/products/0-BPK27.html)
I made a typo, it should be PK 27, not 17 like I said before.
BTW, your going to need the 6mm hubs for these.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 10:03:00 PM
0_0 is there a fast motor for $20 each? just  two of THOSE motors, the sabertooth, and the radio will make me go overbudget
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 10:12:02 PM
http://kitbots.com/product.sc;jsessionid=F477ACD531DA7221708C8104829FC4CD.qscstrfrnt06?productId=20&categoryId=1 (http://kitbots.com/product.sc;jsessionid=F477ACD531DA7221708C8104829FC4CD.qscstrfrnt06?productId=20&categoryId=1)

^ :gawe: ^

I kid, I kid but if you can convince your parents those are the motors to get.


Or you could get these

http://cgi.ebay.com/2-x-12V-1000RPM-Mini-Torque-Gear-Box-Motor-Hobby-DC-NEW-/280635501227?pt=LH_DefaultDomain_0&hash=item41572deaab (http://cgi.ebay.com/2-x-12V-1000RPM-Mini-Torque-Gear-Box-Motor-Hobby-DC-NEW-/280635501227?pt=LH_DefaultDomain_0&hash=item41572deaab)

But if you can only buy stuff from robot marketplace I gues you are just going to have to wait for the same motors I just gave you links for to get back in stock at robot marketplace.

The 1000RPM motors and the B16 motors are the same motors just different brand.

Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 10:14:26 PM
a couple questions about the motors

1. what's the shaft diamiter?
2. how many volts are required to use them fully?
3. are those bananna plugs at the ends?
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 16, 2011, 10:16:51 PM
1. 4mm
2. 6-12
3. Not sure
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 10:17:57 PM
i think i'll go with the 1000rpm motor, i'll go ask my parents
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 10:19:13 PM
1. 4mm

2. I wouldn't run them beyond 12-14v

3. I think so but you can probably get them with a different connecter if you ask Pete nicely.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 10:21:35 PM
who's pete?
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 16, 2011, 10:22:44 PM
The guy who owns Kitbots
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 16, 2011, 10:23:11 PM
thanks for the info
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 17, 2011, 12:00:42 PM
sorry for DP, but would they run normally if i cut off the bananna connectors and strip the wires?
Title: Re: Team Fox/ i could use some help
Post by: Jack Daniels on April 17, 2011, 12:15:18 PM
sorry for DP, but would they run normally if i cut off the bananna connectors and strip the wires?

I would imagine so.  Banana connectors just make it easy to remove (unplug) the motor if you need to swap it out.  If you strip the wires, bear in mind, it will be harder to swap the motor out if you were in a competition and it needed to be replaced.

When getting into a build, try to imagine scenarios that you might run into when in a competition.  This will make it easier for you to anticipate replacing parts if they get broken.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 17, 2011, 12:45:18 PM
sorry for DP, but would they run normally if i cut off the bananna connectors and strip the wires?

I would imagine so.  Banana connectors just make it easy to remove (unplug) the motor if you need to swap it out.  If you strip the wires, bear in mind, it will be harder to swap the motor out if you were in a competition and it needed to be replaced.

When getting into a build, try to imagine scenarios that you might run into when in a competition.  This will make it easier for you to anticipate replacing parts if they get broken.


Actually, my speed controller has screw terminals, so it will still be easy to unplug.
Title: Re: Team Fox/ i could use some help
Post by: Wolfsbane on April 18, 2011, 08:56:52 PM
sorry for DP, but would they run normally if i cut off the bananna connectors and strip the wires?

I would imagine so.  Banana connectors just make it easy to remove (unplug) the motor if you need to swap it out.  If you strip the wires, bear in mind, it will be harder to swap the motor out if you were in a competition and it needed to be replaced.

When getting into a build, try to imagine scenarios that you might run into when in a competition.  This will make it easier for you to anticipate replacing parts if they get broken.


Actually, my speed controller has screw terminals, so it will still be easy to unplug.


EDIT: i'm thinking about making a pushy bot instead. is this good stuff for a pushy bot?






Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 18, 2011, 09:14:12 PM
Nope, basically none of that stuff is good.

Tracks are a pain in the butt to work with and can come off or get cut, killing your ability to move. Two spark gearmotors aren't enough for a beetleweight pushy bot. (Mike uses two of them in his ant) Really nonrecharable batteries in a battery holder. (not enough voltage and it's gonna cost a lot in the long run) Vex robotics chasis kit? First off that's cold roll steel. Second off thats 1/3 of your weight. Excluding armor. Thirdly thats just gonna be huge. 24 gauge wire is way way way too small. You around 18 gauge wire.

Seeing as you are kinda clueless in terms of robot design, might I intrest you in one of these beetleweight drum spinner kits? The robot it's based off of consistently wins and places top 3 in events. 
http://kitbots.com/product.sc;jsessionid=3A55668966C7E9407D7A9BBA4F0BB3A9.qscstrfrnt05?productId=19&categoryId=1 (http://kitbots.com/product.sc;jsessionid=3A55668966C7E9407D7A9BBA4F0BB3A9.qscstrfrnt05?productId=19&categoryId=1)
Title: Re: Team Fox/ i could use some help
Post by: R1885 on April 19, 2011, 07:04:04 PM
Thats just the bare chassis, and doesn't come with any parts. Plus, it's going to cost another 120 for the weapon. It's going to cost more for the weapon motor and ESC, not to mention the amount for the drive and batteries.
Title: Re: Team Fox/ i could use some help
Post by: SKBT on April 19, 2011, 07:46:23 PM
So... I support Kitbots.... :P
Title: Re: Team Fox/ i could use some help
Post by: zipdragon64 on April 20, 2011, 09:39:47 AM
So... I support Kitbots.... :P


by that he means working robots