TRB's antweight project

[Vertigo]

UK ants are US fairys

[smashysmashy]

Sorry, obviously heard it wrong when I was watching it on RW.

[Badger]

I can't remember if I made a different thread for this, please do call out my idiocy if I have.

OK, just under a year from the last post, I'm still looking for:

Drive Servos (Any help would be great)
Battery + Charger (Again, help would be welcomed)
Wheels

If anyone has any spare servos suitable for drive that they're selling (360 degree continuous rotation, Futaba/Hitec connectors), could I possibly buy them?

Edit:
Would a couple of these be suitable for the drive?
http://robots.allthingsgeek.com/catalog/product/view/id/7/s/continuous-rotation-micro-servo/

[Phoenyx]

That micro servo you're using for the lifter isn't going to do too much. You need at least a standard size high-torque to get any decent lifting power.

I've built some stuff before just messing around, and anything less than a standard servo with 200 oz-in of torque won't lift anything. They're designed for steering in Ready to Run RC cars and control surfaces on 40-size aircraft, and usually neither of these require much load.

Keep in mind that the longer the lifting arm, the less torque you'll have at the end of the arm. You could be able to get something to work if you have an exceptionally short flipper, but otherwise you'll definitely need an upgrade.

As for that drive servo, it will work but in general constant rotation servos are slow.

[Badger]

That micro servo you're using for the lifter isn't going to do too much. You need at least a standard size high-torque to get any decent lifting power.

I've built some stuff before just messing around, and anything less than a standard servo with 200 oz-in of torque won't lift anything. They're designed for steering in Ready to Run RC cars and control surfaces on 40-size aircraft, and usually neither of these require much load.

Keep in mind that the longer the lifting arm, the less torque you'll have at the end of the arm. You could be able to get something to work if you have an exceptionally short flipper, but otherwise you'll definitely need an upgrade.

As for that drive servo, it will work but in general constant rotation servos are slow.

Thanks for helping!

OK, so a normal servo for the flipper/lifter.

And the servos  are perfect. Slow so I can drive it easily and easy to plug in and use. I'll just wait for a second opinion, just in case, before I order then, though. I'm a bit short on money ATM.

Anything on the batteries?

EDIT:

However, if you are creating a flipper weapon, then you want to use a   servo. It's recommended to get a micro servo with extremely high torque   so it can flip other robots with ease.

http://www.wikihow.com/Build-an-Antweight-Combat-Robot

So, a normal servo or a powerful micro one?

Yet another EDIT:
Standard servo w/ 200oz/in at 6v? Nope.
http://servocity.com/html/hs-7945th_servo.html
65g (Nearly 1/2 of the weight allowance!)
£90 (That's about the same as the rest of the bot put together, including my current weak servo (Up until this point.)!)

[haz]

don't bother with standard size servos, too heavy.
look for a metal gear servo, about 20-25g with about 3kg of torque, will run you £20 at most, more likely £15.

[Badger]

don't bother with standard size servos, too heavy.
look for a metal gear servo, about 20-25g with about 3kg of torque, will run you £20 at most, more likely £15.

Like this?
http://www.servodatabase.com/servo/blue-bird/bms-380max

And how about these for the drive?

[R1885]

Please don't use servos for drive, you'll be literally driven around in circles by faster bots.
A pair of tiny escs from finger tech only weigh 4.5 grams each, and a pair of gold sparks(also from finger tech) weigh 28 grams each.
That adds to about 65 grams. If that's too heavy for you, this gear motor would work fine: http://www.robotcombat.com/products/0-GM11A.html

[Phoenyx]

Well, if you're building something that small, then go for a high-torque micro, but make sure it's a high-end one. You'll still need around 150 oz-in of torque.

[Badger]

Please don't use servos for drive, you'll be literally driven around in circles by faster bots.
A pair of tiny escs from finger tech only weigh 4.5 grams each, and a pair of gold sparks(also from finger tech) weigh 28 grams each.
That adds to about 65 grams. If that's too heavy for you, this gear motor would work fine: http://www.robotcombat.com/products/0-GM11A.html

I'm not going to be completing with this thing, and if I need to I can switch out later. The thing is that motors need tools. The most sophisticated tools I have available is a pair of scissors, and a saw if needed. Servos can be plugged directly into the receiver, so they're ideal for me.

Well, if you're building something that small, then go for a high-torque micro, but make sure it's a high-end one. You'll still need around 150 oz-in of torque.

Are you sure? Everything I've read about AW lifters/flippers like to servos with less than half that.

[R1885]

Just get a cheap soldering iron. That's all you need to use the ESCs.

[Badger]

I'm not using motors right now. Maybe when I get this thing finished I'll switch, but not now.

Anyway, I still need batteries and the right weapon servo.

[haz]

with 7 cm wheels, servos are fine for a beginer.
you can always speedhack if you feel like it, you will have no pusing power
understand the fact you want it controlable, good to practice with, then buy motors.

hang on, i could have sworn you live in the uk? and are building a 150g ant?
http://www.kingslynnmodelshop.co.uk/p309/Hitech_HS-82MG_Servo/product_info.html?utm_source=google&utm_medium=shopping&utm_campaign=xigen_shopping_feed&gclid=CPzkiKmN_rACFWJItAodVly98w

flipper servo

[Badger]

with 7 cm wheels, servos are fine for a beginer.
you can always speedhack if you feel like it, you will have no pusing power
understand the fact you want it controlable, good to practice with, then buy motors.

hang on, i could have sworn you live in the uk? Yep. and are building a 150g ant? Yep, well, I'm not sticking to the rules too strictly.
http://www.kingslynnmodelshop.co.uk/p309/Hitech_HS-82MG_Servo/product_info.html?utm_source=google&utm_medium=shopping&utm_campaign=xigen_shopping_feed&gclid=CPzkiKmN_rACFWJItAodVly98w

flipper servo

OK, I'll probably get that then. Anything on batteries, so which drive servos?

[Vertigo]

Please don't use servos for drive, you'll be literally driven around in circles by faster bots.
A pair of tiny escs from finger tech only weigh 4.5 grams each, and a pair of gold sparks(also from finger tech) weigh 28 grams each.
That adds to about 65 grams. If that's too heavy for you, this gear motor would work fine: http://www.robotcombat.com/products/0-GM11A.html

The fingertech motors are far from ideal for a UK ant. They are too big and too heavy to be practical to use, and would force either extra gearing for 4WD or staggered wheels. They are also only available from the US. Ordering components from outside Europe is not preferable when you're only building an ant, especially since he doesn't want to compete with it competitively.

Anyway, I agree with haz on regards with the weapon servo, either that or the HPXF for an ant (I personally prefer the HPXF, but both work well). It you do want to use servo drive, which is wise if you don't want to use it competitively, I would recommend the SG90 servos from GiantCod (http://www.giantshark.co.uk/towerpro-sg90-micro-servo-p-268.html). I have not used them, but according to all accounts, they are easy to speed hack and, though can wear out, are not expensive to replace.

[Badger]

Please don't use servos for drive, you'll be literally driven around in circles by faster bots.
A pair of tiny escs from finger tech only weigh 4.5 grams each, and a pair of gold sparks(also from finger tech) weigh 28 grams each.
That adds to about 65 grams. If that's too heavy for you, this gear motor would work fine: http://www.robotcombat.com/products/0-GM11A.html

The fingertech motors are far from ideal for a UK ant. They are too big and too heavy to be practical to use, and would force either extra gearing for 4WD or staggered wheels. They are also only available from the US. Ordering components from outside Europe is not preferable when you're only building an ant, especially since he doesn't want to compete with it competitively.

Anyway, I agree with haz on regards with the weapon servo, either that or the HPXF for an ant (I personally prefer the HPXF, but both work well). It you do want to use servo drive, which is wise if you don't want to use it competitively, I would recommend the SG90 servos from GiantCod (http://www.giantshark.co.uk/towerpro-sg90-micro-servo-p-268.html). I have not used them, but according to all accounts, they are easy to speed hack and, though can wear out, are not expensive to replace.

Thanks for the great info, yet again. And what luck! I already have one, I was going to use it for my weapon servo.

Now all I need is to find a battery + charger (6v NiMh if possible.)

[Vertigo]

Please don't use servos for drive, you'll be literally driven around in circles by faster bots.
A pair of tiny escs from finger tech only weigh 4.5 grams each, and a pair of gold sparks(also from finger tech) weigh 28 grams each.
That adds to about 65 grams. If that's too heavy for you, this gear motor would work fine: http://www.robotcombat.com/products/0-GM11A.html

The fingertech motors are far from ideal for a UK ant. They are too big and too heavy to be practical to use, and would force either extra gearing for 4WD or staggered wheels. They are also only available from the US. Ordering components from outside Europe is not preferable when you're only building an ant, especially since he doesn't want to compete with it competitively.

Anyway, I agree with haz on regards with the weapon servo, either that or the HPXF for an ant (I personally prefer the HPXF, but both work well). It you do want to use servo drive, which is wise if you don't want to use it competitively, I would recommend the SG90 servos from GiantCod (http://www.giantshark.co.uk/towerpro-sg90-micro-servo-p-268.html). I have not used them, but according to all accounts, they are easy to speed hack and, though can wear out, are not expensive to replace.

Thanks for the great info, yet again. And what luck! I already have one, I was going to use it for my weapon servo.

It's really not powerful or 'well made' enough to take the straight of being a weapon servo. The HPXF or HS-82MG that Haz mentioned would be much more suited to that role.

[Badger]

Yeah, I kinda guessed that when I got it

So, any help with those batteries?

[Vertigo]

http://www.component-shop.co.uk/html/small_packs.html

I don't use NiMH batteries for ants, so I'm not too sure what chargers people use. Maybe Haz could give you some advice here?

[haz]

componant shop do chargers aswell, they are not hard to find. just make sure you get the right adapter, most of the chargers have tamiya conceters on, so you need a  tamyia to futaba/hitec/jr adapter