www.robowars.org

RoboWars Australia Forum Index -> Builders Reports

Micro Magnum, Team Magnum, NSW
Goto page Previous  1, 2, 3 ... 16, 17, 18 ... 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  

It all depends on how likely it is that each part will get damaged. I would at least get a spare for the front wedge and other external parts that will take direct impacts. Internal parts should last longer as long as they are well designed. It might be an idea to have a spare disk - they should last a while but when spinning weapons fail, its usually sudden and catastrophic.
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Mon May 01, 2017 5:53 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Ah I see. Thanks Nick.

Post Mon May 01, 2017 6:05 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Well... Turns out that laser cutting really can't make holes with diameter smaller than the thickness of the plate, so that means I will have to find another place to machine the hardox parts. (the part in question was the spinning disc, which is 15m thick and have m8 holes in it.)

Any suggestion on machine shops other than action laser?

Post Sun May 07, 2017 12:51 pm 
 View user's profile Send private message
Nick
Experienced Roboteer


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


 Reply with quote  

Aquacut http://www.aquacut.com.au/index.html have been very helpful and they are in Sydney. Perhaps if the 8mm holes can't be lasered, you can just get the laser to blow a hole through the disks for positioning and then have another place drill out the holes.
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Sun May 07, 2017 2:02 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Thanks for the info.

Their website says they also do laser cutting, so I might be able to do all the steel parts there. Smile

Post Sun May 07, 2017 3:14 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Update: I've found someone to do the ali parts, and the pulleys are also sorted out.

The problem is the steel/wear plate parts... Actionlaser said that they cannot cut holes with diameter smaller than thickness. I asked Aquacut but so far no replies... So...any other possible solutions?

Post Mon May 29, 2017 1:25 pm 
 View user's profile Send private message
maddox



Joined: 21 Dec 2006
Posts: 786
Location: Belgium


 Reply with quote  

Why are the holes smaller in diameter than the thickness of the plate?

The only reason I can see is to have enough meat left to tap the hole. But tapping in wearplate, that is something I try to avoid at all cost.
My taps ain't happy with that task.... I rather use rivnuts or weld a nut to the plate.

Post Mon May 29, 2017 2:39 pm 
 View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
Nick
Experienced Roboteer


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


 Reply with quote  

The guy at Aquacut is in the UK for a funeral for about another week. I found that DMG Engineering http://www.dmgengineering.com.au/ was cheaper by 40% and got my parts cut in less than a week.

Edit: yeah, weld nuts are the way to go rather than tapping Bisalloy!
_________________
Australian 2015 Featherweight champion
UK 2016 Gladiator champion


Last edited by Nick on Mon May 29, 2017 2:41 pm; edited 1 time in total

Post Mon May 29, 2017 2:40 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

The holes are in the spinner disc, eight 8mm through holes to fix the disc to the center tube.

Post Mon May 29, 2017 2:41 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Thanks for the info Nick.

Post Mon May 29, 2017 7:14 pm 
 View user's profile Send private message
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

In the middle of a buying streak, I'm currently stuck on radio systems...

I'm totally a newbie at RC stuff so... Any suggestions?

(I would love to have the ability to do tank steering mixing (if that's a thing), but I don't really know how to search for that.)

Post Wed May 31, 2017 11:52 pm 
 View user's profile Send private message
chunkulator



Joined: 27 Jul 2016
Posts: 219


 Reply with quote  

The feature you need to search for is generally called "V Tail Mixing", because it's mainly used on RC planes which have V shaped tails with control surfaces on them that act as combined rudder and aileron or something.

HobbyKing sell these radios which are the cheapest way to get started:
https://hobbyking.com/en_us/hobby-king-2-4ghz-6ch-tx-rx-v2-mode-1.html

If you buy the programming cable you can set up skid steer mixing from a PC. They also failsafe correctly.

Many people also use the Orange radios. Also other cheap radios that have a "V Tail Mix" feature can be made to work.

The other feature you need is a receiver that has failsafe. This means that when the receiver loses connection from the transmitter it either explicitly sends a centre stick position to your ESCs or stops sending signal to your ESCs altogether, in which case your ESCs will also stop the robot. Before you will be allowed to fight you need to demonstrate that your robot stops all movement when you switch off your transmitter.

Post Thu Jun 01, 2017 6:30 am 
 View user's profile Send private message
maddox



Joined: 21 Dec 2006
Posts: 786
Location: Belgium


 Reply with quote  

RX/TX sets. My first one was a Multiplex Commander 2020. Cost. 1 months wage. Prone to interference and difficult to setup.

Now Team RCC uses the FlySky FSi6. Costs about 8 McDonalds menus, easy to use and due the 2.4GHz tech, interference is not a big deal anymore.

Post Thu Jun 01, 2017 3:28 pm 
 View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
MoonSet416



Joined: 25 Sep 2016
Posts: 436
Location: Sydney


 Reply with quote  

Thanks for the info chunkulator and maddox.

I've still got a few questions though...

How do I know if a Rx has failsafe? I looked at the Rx in the link but there's no description on that...

I also noticed that there are mode 1 and 2 version of the same Tx, the only difference being the throttle position (left or right). Does that affect mixing? (I wish to have tank/V-tail mixing on the left and weapon on the right, does that mean I should get the version with left side throttle?)

Post Thu Jun 01, 2017 4:57 pm 
 View user's profile Send private message
chunkulator



Joined: 27 Jul 2016
Posts: 219


 Reply with quote  

Ordering from cheap places like HobbyKing the only real way to know if the Rx failsafe behaves properly is to buy one and see, or ask on here in case somebody has tried it. I've been posting info on any radios I've bought and tried in the Technical section of the forum. One of the radios I bought recently didn't failsafe but I bought a new RX that worked with the transmitter that did, for example.

On mode 1 vs mode 2, this is usually switchable on the transmitter by programming them through the programming port, setting internal jumpers or dip switches or something like that. Usually the throttle stick doesn't have a return-to-centre spring so you may need to manually open it up and move the spring around if it's not on the stick you want it on.

Post Thu Jun 01, 2017 6:21 pm 
 View user's profile Send private message
  Display posts from previous:      

Forum Jump:
Jump to:  

Post new topic   Reply to topic
Page 17 of 47

Goto page Previous  1, 2, 3 ... 16, 17, 18 ... 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.