Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: tjpark1111 on December 30, 2007, 10:24:14 PM

Title: major robot noob...help
Post by: tjpark1111 on December 30, 2007, 10:24:14 PM
i read the helpful guides posted in this website (thank you!) but i'm still a bit bleak on what to do. i have to build a robot for science olympiad and it has to be able to pick up/move stuff like tennis balls and pop balloons that are inside a box. it has to have wheels so its more of a car that has arms on it. i still really don't understand how to install a servo... you attach a microcontroller to it... then how do you control it???? im guessing for the arms i need to attach some kind of cable to a servo... but overall im just really confused about what to do can anybody help? im really sorry if this is sort of a redundant post.
Title: Re: major robot noob...help
Post by: ed1380 on December 30, 2007, 10:32:11 PM
what size robot are we talking about?

you control teh servo through pulse width management which is programmed into the MCU
Title: Re: major robot noob...help
Post by: tjpark1111 on December 30, 2007, 11:00:02 PM
the robot has to fit in a 30cm cube in the beginning, so 30cm x 30cm x 30cm. it's gonna be run on a carpet, no hydraulics, pneumatics, or fluid mechanisms.
batteries can't exceed 9.6 volts. radio frequencies, if wireless, need to be in 75, 49, or 27mhz.
i have to move 4 tennis balls, a stack of 5 index cards, and 3 d-cell batteries into a goal box which is also 30x30x30. i need to pop 2 nine inch balloons which is inside the goal box, and take out 2 nine inch balloons from the goal box, then dump all of the stuff in.
this is the playing field: http://www.soinc.org/events/robotram/RRplayfield08.pdf
i really hope this isn't too hard to do...?
Title: Re: major robot noob...help
Post by: tjpark1111 on December 30, 2007, 11:01:33 PM
and if possible can you like sort of explain in laymans terms what all of that meant with the programming? i don't understand..
Title: Re: major robot noob...help
Post by: tjpark1111 on December 31, 2007, 08:57:42 AM
arms are probably much more complicated so i could have sort of a rotating mill that can pick up stuff, or a door design which is just back and forth motion, but i still really need to understand how to program a servo, or how to use it, just in general.
Title: Re: major robot noob...help
Post by: Admin on December 31, 2007, 09:52:26 AM
What about something like this?
http://www.societyofrobots.com/robot_asme.shtml


also useful for you:
http://www.societyofrobots.com/batteries.shtml
http://www.societyofrobots.com/actuators_servos.shtml
http://www.societyofrobots.com/remote_control_robot.shtml
Title: Re: major robot noob...help
Post by: tjpark1111 on December 31, 2007, 11:22:00 AM
oh jeez i never found that tutorial, that's almost exactly like what i'm doing! thanks!
so for servos, if you have a RC receiver and a transmitter, it just automatically programs the commands for you?
the tutorial says: So how do you apply this square wave to your servo? If your robot is remote controlled, your RC receiver will apply the proper square wave for you. so does this mean i just connect some wires and if i turn all of the stuff on it'll just start working and i can control it with my transmitter?
i don't have power tools or even a hacksaw (i guess i could buy one easily) readily available with me, although my school has a robotics club with a big woodshop, so maybe i could utilize that.
can i get that HDPE stuff or any reasonable building material for the robot at home depot? or is it really special so i need to order it online?
Title: Re: major robot noob...help
Post by: Admin on December 31, 2007, 12:19:13 PM
yes, to all of your questions. ;D
Title: Re: major robot noob...help
Post by: tjpark1111 on December 31, 2007, 06:02:19 PM
ok yay!  :D
so ive watched that video of yours of that robot with the arm like 1500 times, and i've found one problem. one of the objectives in my competition is that i need to pop 2 balloons and also take out 2 balloons from a box, and i dont think an arm like that can really reach in a box that's 30cm high...
you're allowed to move the box, flip it over, whatever, so do you think it'll be better if i have something that'll move the box itself, or do you think it'd be better to add some sort of extension to the sort of arm you had so i can reach inside the box? thanks so much!
and one more thing: i don't have any of that fancy software nor do i have a very powerful computer to run that kind of program. can i just take the good ole' pencil and paper? or is that risking accuracy?
Title: Re: major robot noob...help
Post by: Admin on December 31, 2007, 06:07:10 PM
well, that arm was designed to lift a lot of weight. you can instead make the arm much thinner and longer to reach in the box or something.

a good engineer develops multiple ways to solve the same problem, then picks the best. usually your first idea is a typically obvious solution, but not always the best.

Quote
i don't have any of that fancy software nor do i have a very powerful computer to run that kind of program. can i just take the good ole' pencil and paper? or is that risking accuracy?
search for a free CAD program called google sketchup
Title: Re: major robot noob...help
Post by: tjpark1111 on January 01, 2008, 09:03:47 PM
is there any way i can look at the files you created for your ASME robot? (without paying like $500 for software?)
Title: Re: major robot noob...help
Post by: Admin on January 01, 2008, 09:48:51 PM
solid works has viewer programs to let you see but not modify files . . . i dont know it off hand, but if you google it you should be able to find it . . .
Title: Re: major robot noob...help
Post by: ed1380 on January 02, 2008, 10:05:57 AM
i believe it's called edrawing
Title: Re: major robot noob...help
Post by: tjpark1111 on January 05, 2008, 10:20:43 AM
thanks! the program worked!
anyway should i use continuous servos for the wheels? (making a differential).
im wondering how i should connect the servo to the wheels, how to make an axle, how to attach the wheels to the chassis.....
i noticed a 100 people have viewed this thread already it'd be great if you could help. thanks!
Title: Re: major robot noob...help
Post by: Admin on January 05, 2008, 10:25:45 AM
This should help you a bit:
http://www.societyofrobots.com/mechanics_chassisconstruction.shtml
Title: major robot noob...help
Post by: SmAsH on January 10, 2008, 05:00:00 PM
yea as admin said make the arm a bit thinner but u should also make 1 or 2 more joints so it can reach in box...or just tip the box over XD...
anyway hope it helped
Title: Re: major robot noob...help
Post by: garriwilson on January 10, 2008, 11:05:24 PM
You do not need an axle at all. You can use velcro to attach the servos to you chassis but if you don't have any, you can go to a store like radioshack or staples that has school supplies and get double sided tape. You attach the wheels with the servo horns which come with the servo. They look like this:

http://www.futaba-rc.com/parts/futm1980.jpg

I actually made a thread for and R/C project which has a lot of useful info but it's kind of long: http://www.societyofrobots.com/robotforum/index.php?topic=2648.msg19356#msg19356

You don't really attach the wheels to the chassis, but attach the wheels to the servos and then attach the whole component (servo+wheel) to the chassis with velcro, double sided tape, or servo mounts.

You don't need an axle because the wheels are separately attached to two servos like this: http://www.societyofrobots.com/images/sbs_8.JPG

And for chassis construction this part of the $50 tutorial is really useful: http://www.societyofrobots.com/step_by_step_robot_step2.shtml

I've never made a robot arm so I'm not going to say anything in fear of misleading you. Good luck!

EDIT: Just remembered about this tutorial on how to attach wheels to servos: http://www.kronosrobotics.com/an118/GAN118.shtml
Title: Re: major robot noob...help
Post by: tjpark1111 on January 11, 2008, 10:12:28 PM
thank you all so much!!
i just realized that the 2 blue balloons have to be popped, and HAVE to stay in the box, even after popping, at all times. in addition, the 2 red blues need to be taken out, but they can be blown to any size, or just left deflated. i was thinking i could just move the box around as i want with suction cups(saw this in a youtube video) but since the balloons can't leave the box, i cant really use that idea anymore....
do you guys know if lasers can penetrate plexiglas? if so, how can i turn it on/off wirelessly on a robot? using a servo just to press the switch on the laser would be pretty stupid (im thinking maybe i can pop balloons inside the box using a laser, although im not sure if they're allowed, i asked).
Title: Re: major robot noob...help
Post by: SmAsH on January 13, 2008, 04:00:30 AM
yea but the only problem with lazers is that if theyre strong enough to pop a balloon theyre strong enough to blind someone...you might want to take that into consideration if using lazers and warn EVERYONE to to look at it. but even if they dont look down the robot could slip or a wheel come off (happened to me many times) and it could point up at someones eye.
anyway check with your teachers
Title: Re: major robot noob...help
Post by: Trumpkin on January 13, 2008, 06:04:41 PM
lasers that powerful can cost lots like $500 at least
Title: Re: major robot noob...help
Post by: tjpark1111 on January 14, 2008, 08:48:00 PM
yeah i asked the competition people if lasers are allowed and they haven't responded.
in the meantime, i have a few ideas ive taken from other contenders from pats years and i want to know which one you guys like hte most:
1) longer, thinner arm to reach in the box to take out balloons, pop balloons, and put stuff in (i was thinking this would take too long, i have 3 minutes max).
2) tip over box with a level/arm design: http://youtube.com/watch?v=mGxK7feikcw the only problem: is there a way i can design this so i can put the box back to its original position? the box needs to put open side up at the END of time (can do anything with box before time is called).
3) pick up mechanism http://youtube.com/watch?v=nTcX5S3kql0&feature=related      problem: i need to unload all of that stuff into a 30cm high box... how can i do that with this mechanism? and how would i be able to pop/take out balloons if this was my only mechanism on my robot (or, is there a way to attach an arm in addition to this method? that would be killer).
and any other alternates would be MUCH MUCH MUCH appreciated.
Title: Re: major robot noob...help
Post by: SmAsH on January 14, 2008, 08:57:33 PM
yea trumpkin you can make your own lasers powerful enough to pop balloons...take a look on youtube ive made a few before but they all got confiscated at school
Title: Re: major robot noob...help
Post by: tjpark1111 on January 14, 2008, 09:06:23 PM
and also, i really wanna make this clear, im still a little confused.
say i have 2 continuous servos for 2 wheels on my robot attached to one RC receiver.
let's say i have a 6 channel transmitter like this: http://www.robotmarketplace.com/products/0-GWS-GWT6A.html
to make the car go forward (both servos turning), do i press forward on two of the joysticks? how can i make it so that i have those 2 servos controlled specifically by 2 adjacent joysticks (and not like two random toggles on the transmitter). is there a way to organize which toggle controls which servo on a basic transmitter like this?
also, is it true that lasers can't pop balloons when there's lights on or if the balloon isn't a dark color?
Title: Re: major robot noob...help
Post by: SmAsH on January 14, 2008, 11:35:45 PM
hmm....yes u would have to press both joysticks forward if you have two that will go forward....its a lot easier if you have on joystick controlling one servo...im not sure about the balloon thing tho...

~smash
Title: Re: major robot noob...help
Post by: tjpark1111 on January 15, 2008, 03:42:16 PM
i looked at the trasmitters more closely, and it looks like they only have 2 joysticks and the rest of the buttons are all just trim controls (can anyone explain what these are?). am i missing a few buttons on the top/side of the transmitter or something, or are there erally only 2 joysticks even on a 6 channel transmitter? also, since i have an arm and possibly other functions on my robot, do i need to change channels to move the arm, use the joystick, then switch channels again to control the servos on the wheels? i would have to have some pretty swift hands....
Title: Re: major robot noob...help
Post by: paulstreats on January 15, 2008, 06:22:19 PM
maybe the joysticks go up/down/left/right individually. This would account for 4 channels...

The trim controls are so you can set the joysticks to center. Sometimes if youre trying to drive straight with a car with the turning joystick centered, it will still veer off slightly so you use the trimmer to adjust the output signal of the central position.
It can also be used to set helicopters etc... to hover rather than cut off at center position.

Theres could be an extra pot that can be used to remotely turn lights on etc... this would take up a channel too.

Also with the which controls do i press to make the servo's move - then it depends on how you program it...
Title: Re: major robot noob...help
Post by: tjpark1111 on January 15, 2008, 07:24:21 PM
that's the thing - i heard there IS no programming when you use RC. do you think maybe i should plug in servos one by one into the receiver, turn transmitter on, etc. to make it programmed into 1,2,3, accordingly?
also, do i need to get the same brand, transmitter, receiver, and servos for this whole thing to work?
anyway, thanks for the other tips from everyone else!
Title: Re: major robot noob...help
Post by: paulstreats on January 15, 2008, 07:37:14 PM
no, you dont need the same brand.

The only thing that needs to be the same is that the transmitter and receiver are both set to work with the same amount of channels and at the same frequencies.

If youre not using a microcontroller, then you will have to have 1 servo on each channel, You will have to check with the documentation for the receiver since its likely only set up for certain ports to use servos on
Title: Re: major robot noob...help
Post by: tjpark1111 on January 15, 2008, 10:32:49 PM
how come this receiver says "futaba only" if brand doesn't matter?
http://www.robotmarketplace.com/products/0-GWR4PII75HF.html
do the transmitter and the receiver have to have the same CHANNEL (as labeled on the crystal?) how can i buy transmitters/receiver that have same channel? buy a package?
where can i buy pre-modded continuous rotation servos?
i need help calculating the torque needed for the robot arm. it's confusing because even if i use minimal values i get like 34 POUNDS PER INCH which you can't get with like ANY servo, that's friggin 544 oz/in!! it's a little complicated because im not exactly lifting the object, im pushing a box up from the box's bottom so the box can tip over back to its original orientation. so i'm not really lifting the box off the ground or anything. what am i doing wrong?
Title: Re: major robot noob...help
Post by: SmAsH on January 16, 2008, 01:39:27 AM
hmm...yeah that is tricky..sorry cant help you...


~smash
Title: Re: major robot noob...help
Post by: airman00 on January 16, 2008, 06:19:35 AM
Maybe it says futaba only because they're are different connector types http://www.servocity.com/html/connector_types.html (http://www.servocity.com/html/connector_types.html)
Or maybe different brand servos have different pulse ranges

Buy a package of transmitter and receiver -- it'll make your life easier and you'll be sure that it works

I think that companies have begun to sell continuous servos now, but I would still modify it , its much cheaper!

it's a little complicated because im not exactly lifting the object, im pushing a box up from the box's bottom so the box can tip over back to its original orientation. so i'm not really lifting the box off the ground or anything. what am i doing wrong?

What do you mean by that, explain that more . Maybe upload a diagram ;)
Title: Re: major robot noob...help
Post by: SmAsH on January 16, 2008, 03:52:44 PM
yea ive gone and bought 2 76 mhz for a chopper and they were slightly off..really annoys me.


~smash
Title: Re: major robot noob...help
Post by: tjpark1111 on January 16, 2008, 05:41:28 PM
sorry i wasnt clear.
so i want to tip the box over, then after doing some other task, prop the box back to its original orientation.
ok i drew a diagram but i have no idea how to put it as a post here. anyway, i have a thin arm (as suggested) that can rotate 180 degrees (like a car wipers) with a shape at the end of it so it can hook onto the the top of the box (bottom and top sides of box are open). when i get close to the box, i can rotate the arm around and ill have to practice, but get the hook to just loosely latch on to the top edge of the box (ill make the hook big so its easy to make it latch on). then, i could just drive backwards (does servo reversing enable this?) and the box will tip over (open ends pointing horizontally) since it's a carpet surface. also, i could just try to rotate the arm downwards after i drive backwards a little, maybe that'll help. after that, ill have the hook designed so that once i lower the arm, i can drive forward a little bit and a thin part of the plastic/metal can dig into the bottom of the box, then i can start lifting a bit, and then drive forward for the box to tip back over into its correct orientation. i hope thats a little clearer so you guys can help me?
Title: Re: major robot noob...help
Post by: SmAsH on January 16, 2008, 05:50:37 PM
maybe you can get a shovel attachment and slide under to tip back up...


~smash
Title: Re: major robot noob...help
Post by: tjpark1111 on January 16, 2008, 08:05:32 PM
i was actually thinking id have the arm up front and a passive shovel (just a piece of metal, or i could just buy premade) in the back to round up all the stuff (tennis balls, index cards, etc.) into the box. also, i posted this in the electronics section, but "the newbie guide tells me to double the torque that i THINK i would need, but im really worried that'll ill get TOO MUCH power and whenever i try to use my arm itll just go from 0 to 180 degrees rotation in like 1 second so i have no maneuverability at all. how can i get my robot to operate like the wall climbing robot that the admin made, where all the movements are smooth, nothing jerks because something is too fast/powerful, etc." ive seen video where a simple differential drive robot (like the $50 one on this site) steered a little too much everytime the throttle was applied so in a small robot playing field, it was hard to maneuver the robot at all. how can i take care of this issue if im using RC? if i get a weak servo im afraid i wont have enough power since 1/4" plexiglas 30x30x30cm box with aluminum/steel reinforcements in the corners could be quite heavy to tip over/move.
Title: Re: major robot noob...help
Post by: tjpark1111 on January 18, 2008, 06:42:34 PM
btw im still confused about the servos. do servos only turn clockwise? does that mean itll only turn an arm around clockwise and the only function after it has reached the turning limit it's just to bring it back to neutral position, not anywhere in between?
Title: Re: major robot noob...help
Post by: SmAsH on January 18, 2008, 06:55:01 PM
yea generally servos do only go clockwise but they can be modified to go anti-clockwise, i dont know how but some companies sell modified servos. as for the power cant you get speed control for them or is that only for dc motors. idk. to your other question you could just get a plate that goes up and down. and get a capasatator to steady the current. well good luck.


~smash
Title: Re: major robot noob...help
Post by: tjpark1111 on January 19, 2008, 08:18:46 AM
so after it turns fully clockwise (let's say 180 degrees), the only function the servo has is to return back to 0 degrees? tahts ALL i need to know. if i know that, i can order parts right now. servocity.com sells counter clockwise for a bit more money.
also, do the 1/4 scale servos have teh same connection types and pulse width ranges? i found that high torque servos in 1/4 scale are a lot cheaper and i just want to know if i can use them with RC receivers.
Title: Re: major robot noob...help
Post by: Trumpkin on January 19, 2008, 11:38:14 AM
does the ballon have to be out of the box? you could just build an arm with a thumb tack attached to the end so you could reach inside the box and pop it.
Title: Re: major robot noob...help
Post by: dunk on January 19, 2008, 01:45:33 PM
Quote
yea generally servos do only go clockwise but they can be modified to go anti-clockwise, i dont know how but some companies sell modified servos. as for the power cant you get speed control for them or is that only for dc motors. idk. to your other question you could just get a plate that goes up and down. and get a capasatator to steady the current. well good luck.
Smash, please refrain from giving advice if you don't know the answer.

Quote
btw im still confused about the servos. do servos only turn clockwise?
hi tjpark1111,
standard servos can turn both ways. they can only rotate 180 degrees total.
you can control which direction they point by altering the pulse width of the timing pulse you send them.
radio control receivers generate these pulses without you having to know anything about how it's done. you can also generate pulses like this with a microcontroller and control servos that way.

it is possible to modify servos by disabling the built in feedback pot so they continuously rotate (either clockwise or anticlockwise).
you can vary the speed by again altering the pulse width of the timing pulse you send them.

dunk.
Title: Re: major robot noob...help
Post by: tjpark1111 on January 19, 2008, 11:17:26 PM
thanks so much!
i know i asked this in the other electronics thread, but:
can i use a 6V battery to power my receiver? (and therefore my 3 ultra high torque servos?)  the how to build a robot guide said a receiver is powered by ~5V and said to use a y harness to use more voltage for the servos which i still don't understand how it works.. what power do you guys recommend? would 2300mah suffice? i have a 300+ oz/in 1/4 scale servo, and 2 80+ oz/in servos.
my other question, and idk if any of you know, what size screw do i use to attach stuff to the servo horn/wheel that the servo comes with? the tutorial on this site just shows pretty pictures and not actual information about how to mount it (like screw size).
Title: Re: major robot noob...help
Post by: SmAsH on January 20, 2008, 12:02:47 AM
well you could glue it. jk lol well dont servos come with screws these day...*sigh* anyway the are standard 1" screws usially fit dont they?


~smash
Title: Re: major robot noob...help
Post by: tjpark1111 on January 20, 2008, 12:05:36 AM
no but they aren't long enough for my applications. size meaning like 5-40.
Title: Re: major robot noob...help
Post by: SmAsH on January 20, 2008, 12:17:16 AM
well that just sucks!


~smash
Title: Re: major robot noob...help
Post by: airman00 on January 20, 2008, 12:22:36 AM
well that just sucks!


~smash

LOL , that made me smile  :)


@tjpark1111

i actually needed the screw size last week but forgot it ...  anyway I searched google for a while to find the size . I'm really tired now so I'll be heading off to sleep , but I'll check tomorrow in the afternoon for you.

Check out servocity.com for extra long servo screws  , they actually sell them .
Title: Re: major robot noob...help
Post by: tjpark1111 on January 20, 2008, 12:24:17 AM
yeah i was planning on that too its just idk the size.
are there any instructions on how to modify a servo to 180 degree rotation?
Title: Re: major robot noob...help
Post by: airman00 on January 20, 2008, 12:27:59 AM
my last post of tonite


yeah i was planning on that too its just idk the size.
are there any instructions on how to modify a servo to 180 degree rotation?

well here it is

attach another bigger gear to the servo gear so that a turn of 90 degrees on the servo gear is a turn of 180 degrees on the bigger gear connected to the servo

ill let someone else on the forum explain this to you if you dont understand
Title: Re: major robot noob...help
Post by: SmAsH on January 20, 2008, 12:29:55 AM
planning to set evil robots on Eric or google the screw size? anyway check the tutorial on this site  for how to modify servos. i would find the link for you but im just to damd lazy!


~smash


now if you'll excuse me im going to go rip apart some useless r/c car!(will post pics on my site 2morrow!!! and airman better do it aswell!!) and go to freaking bed. god! my robot bugs are getting bored!
Title: Re: major robot noob...help
Post by: tjpark1111 on January 20, 2008, 09:23:17 AM
theres a tutorial for 360 movement, NOT 180 degree movement...
Title: Re: major robot noob...help
Post by: tjpark1111 on January 20, 2008, 10:21:24 AM
this is my finalized robot parts list, tell me what you guys think:
(2) Hitec 635-HB High Torque 83 oz-in Servos (will modify for continuous rotation) - $60 @ Servocity
1 Hitec 805BB 1/4 Scale Mega Power 343 oz-in Servo (pre-modified 180 degrees) - $50 @ ServoCity
1 Laser 4 75Mhz Ground 4 Channel Receiver Channel 70 - $70 @ ServoCity
1 Hitec DCX 3-Channel Dual Conversion Negative Shift Receiver - $33 @ TowerHobbies
1 75Mhz Hitec Receiver Crystal Channel 70 - $9.50 @ TowerHobbies
1 6V 2700mAh Sanyo HRAUX 5 Cell NiMH Hump Battery - $33.50 @ OnlyBatteryPacks
1 NiMH/NiCad 4.8V-10.8V Fast Charger - $30 @ OnlyBatteryPacks
1 Pair 4" Precision Disk Wheels - $6 @ ServoCity (powered rear wheels)
1 Pair 2" Precision Disk Wheels - $4 @ ServoCity (two in front for stability)
1 3/8" Stainless Steel Shaft 10" long for front wheels - $14 @ ServoCity
1 HDPE 24"x24" White Sheet - $24 @ McMaster
total ~$334 (I know a bit expensive)
5Kg robot lifting a 5lb (approx.) box, differential drive, doesnt need to be fast, for robot competition. do you guys see any part that i could make cheaper?
any glaring problems you guys see? (incompatibilities..?)
btw do you guys really know if servocity has bad customer service? it said so on the parts list on this site.
Title: Re: major robot noob...help
Post by: Admin on January 26, 2008, 12:58:33 PM
Quote
my other question, and idk if any of you know, what size screw do i use to attach stuff to the servo horn/wheel that the servo comes with? the tutorial on this site just shows pretty pictures and not actual information about how to mount it (like screw size).
well, I used the screws that came with the servos! but as I understand it now, they are getting cheap and no longer including these extras with the servos . . . a 4-40 screw will be fine.

Quote
1 Pair 4" Precision Disk Wheels - $6 @ ServoCity (powered rear wheels)
1 Pair 2" Precision Disk Wheels - $4 @ ServoCity (two in front for stability)
I prefer foam wheels . . . but it really depends on what you plan to do.

Quote
total ~$334 (I know a bit expensive)
not really. I tell people to budget about $500 for their first custom robot. You won't need to buy these parts again, anyway ;D

Quote
btw do you guys really know if servocity has bad customer service? it said so on the parts list on this site.
I had problems with them in the past, they ignored emails, lost parts, but no problems within the last year . . . anyone else?

ps - Smash, try and stay focused and on topic. Don't reply to a post unless you have something important to add. "lol, so cool!" doesn't count ;D
Title: Re: major robot noob...help
Post by: BANE on January 26, 2008, 01:16:13 PM
Quote
ps - Smash, try and stay focused and on topic. Don't reply to a post unless you have something important to add. "lol, so cool!" doesn't count ;D

And something like "hmm...yeah that is tricky..sorry cant help you..."  when the question didn't specify it was for you.  It's like "G thanks that was really helpful ::)!!!!!

(sorry, just had to let that one out)

bane
Title: Re: major robot noob...help
Post by: tjpark1111 on January 26, 2008, 09:04:25 PM
thanks so much everyone! i ordered all of the parts they're all coming monday. it was around $500 like admin said, including shipping and everything. good to know i have all of my parts and i won't need to buy them again, so i guess it was a good investment.
Title: Re: major robot noob...help
Post by: Trumpkin on January 30, 2008, 03:20:09 PM
I have also had trouble with servo city i ordered a battery switch from them once and it came with out screws for the switch cover. They don't answer calls either.