www.robowars.org

RoboWars Australia Forum Index -> Builders Reports

Micro Magnum, Team Magnum, NSW
Goto page Previous  1, 2, 3 ... 22, 23, 24 ... 45, 46, 47  Next

Post new topic   Reply to topic
  Author    Thread
Nick
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW


 Reply with quote  

The last time I was there to pick up a pottery kiln for my sister, two people came in for metal kiln parts and upgrades. If they had 2 customers in 15 minutes for heat treating then they must have plenty of contacts.

I like a 90W iron for XT90 connectors - gets he job done fast with minimal plastic melting. If you are looking to upgrade, don't bother with Bunnings soldering irons - they are crap and will wear out super fast or the heaters will die. Get a better quality Weller soldering iron from RS Components or similar on-line shop. Also try solder with some silver in the mix; 2% silver in tin / lead solder makes a huge difference to how the solder flows & wets connections. Conversely, ROHS lead-free solder is a PITA to work with; much harder to get that stuff to flow on to connections without much extra heat & flux.
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Sun Jul 16, 2017 8:40 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Thanks for the advice. I will try to get a higher powered iron soon.

A place called RJ Heat Treat just said they could do the job for 30 dollars in just a few days. I guess I will go with that then.

Post Mon Jul 17, 2017 4:09 pm 
 View user's profile Send private message
Nick
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW


 Reply with quote  

That's an excellent price!
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Mon Jul 17, 2017 4:25 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Update:

Finished soldering most things...

However, when I plugged in the battery there was a spark at the plug and one of the drive motors twitched a few times. What kind of problem do I have?

Post Wed Jul 19, 2017 9:10 pm 
 View user's profile Send private message
Nick
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW


 Reply with quote  

It might not be a problem - there will always be a spark when you plug in the battery or the power link due to the capacitors on the ESCs charging up. Having the motors twitch may be something that particular model does. As long as nothing caught fire, you are at least half way there Smile. The drive motor ESCs are suspiciously small, what current are they rated for? Also what are the small black devices connected between the drive ESCs and the motors?
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Wed Jul 19, 2017 9:36 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Glad to hear that. I'll keep testing the circuit.

The drive ESCs are the Botbitz 30As. The small devices you see are probably XT90s. I just realized that if the motors are soldered the wrong way I can't really do much about that... Is there a way to reverse certain channels in the Tx/Rx?

Post Wed Jul 19, 2017 9:49 pm 
 View user's profile Send private message
Nick
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW


 Reply with quote  

Most transmitters have a function to reverse the direction of the servo on each channel. if you are mixing in the transmitter, then changing the direction of steering or throttle should do the trick.
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Wed Jul 19, 2017 9:56 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Thanks for the info.

Post Thu Jul 20, 2017 11:46 am 
 View user's profile Send private message
marto
Experienced Roboteer


Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


 Reply with quote  

If you have a BotBitz programming box you can quickly reverse them as well.

Steve
_________________
Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Thu Jul 20, 2017 1:18 pm 
 View user's profile Send private message Send e-mail MSN Messenger
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

That sounds interesting... Any link to that?

EIDT: Nevermind... I didn't read the Botbitz page closely enough.


Last edited by MoonSet416 on Thu Jul 20, 2017 9:07 pm; edited 1 time in total

Post Thu Jul 20, 2017 9:01 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Question:

How do I get my bot to Brisbane? I will fly there, but I wonder if ppl here usually carry the bots on the plane or have them as checked baggage? (especially the batteries)

Post Thu Jul 20, 2017 9:06 pm 
 View user's profile Send private message
chunkulator



Joined: 27 Jul 2016
Posts: 219


 Reply with quote  

Check the luggage rules of the particular airline you're flying on in detail. When I last flew with qantas the rules where that one LiPo can be in the equipment (which you will need to check given that hand luggage must be under 7kg) which must be securely disabled and all spare batteries have to be in hand luggage in a hard case with caps over the terminals. You can get silicone rubber caps for xt60s at hobbyking. Not sure about xt90s.

Post Thu Jul 20, 2017 9:29 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Thanks for the info.

My battery happens to have HXT plugs for some reason... I guess I could seal off another plug with glue and plug it onto the battery.

Post Thu Jul 20, 2017 11:57 pm 
 View user's profile Send private message
Nick
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW


 Reply with quote  

Just wrapping some duct or electrical tape over the connectors should be enough.
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Fri Jul 21, 2017 12:01 am 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Haha that will do it. Thanks Nick.

Post Fri Jul 21, 2017 2:28 pm 
 View user's profile Send private message
  Display posts from previous:      

Forum Jump:
Jump to:  

Post new topic   Reply to topic
Page 23 of 47

Goto page Previous  1, 2, 3 ... 22, 23, 24 ... 45, 46, 47  Next

Forum Rules:
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

 

Last Thread | Next Thread  >
Powered by phpBB: © 2001 phpBB Group
millenniumFalcon Template By Vereor.