www.robowars.org

RoboWars Australia Forum Index -> Builders Reports

Double Dragon - Team BotBitz - QLD
Goto page 1, 2, 3 ... 15, 16, 17  Next

Post new topic   Reply to topic
  Author    Thread
Knightrous
Site Admin


Joined: 15 Jun 2004
Posts: 8511
Location: NSW


 Reply with quote  
Double Dragon - Team BotBitz - QLD

For the last few months, Steve and I have been working together on a BotBitz joint project. With the development of the BotBitz 150A ESC, we wanted to find a way to test these to the max, so where would you be able to test 150A ESC's to the MAX?

ROBOGAMES!

We decided that building just a heavyweight would be a fair task, so we decided to go with a pair of middleweight sized robots as a cluster-bot heavyweight.

We're sorta building it as we go with just a base few parts we have gathered, but these are the specs so far.

Name: Double Dragon
Drive: 1.3Kw 12v Winch motors @ 14.8v, driving 10" front go kart wheels
Electronics: BotBitz 150A Prototype speed controllers, Spektrum TX/RX, Whyachi MS2 power switches.
Batteries: 4S 12800mAh 40C LiPol batteries
Chassis/Armor: Bisalloy, Hardox and Steel.
Weapon: Wedge, Lifter* or Flamethrower* (Pending on time / space / weight)
_________________
https://www.halfdonethings.com/

Post Wed Feb 06, 2013 12:10 am 
 View user's profile Send private message
marto
Experienced Roboteer


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


 Reply with quote  

So you may have seen the 150A test in the botbitz thread.



This is our ESC of choice for driving our motors. What it is, is two TZ85As hooked up in parallel with some communication wires between the MCU. It then has a 16mm Ali block fitted to hold it all together.

I am currently heating 12AWG wires on our batteries up before the ESCs even get warm @ 350A. So I think they should be OK.




Here is more.

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

Post Wed Feb 06, 2013 12:32 am 
 View user's profile Send private message Send e-mail MSN Messenger
Knightrous
Site Admin


Joined: 15 Jun 2004
Posts: 8511
Location: NSW


 Reply with quote  

Here is the progress so far on the drive.

10" x 4" front wheels racing go karts.


The beginning of the first drive shaft for the winch motor


Dual 25mm ball bearings will be fitted into a custom face plate on the winch motors


The bearings get knocked out of the go kart hubs and replaced with HDPE bushes.


Shaft pressed through bushing for test fit.



Last planetary stage fitted to show partial setup


The other side of the test fit


Rubber shock / friction pad which will transfer the drive from the motors into the hub


Fitment photo


This side of the shaft will be threaded to M16 and a nut will compress both sides of the friction drives against the hub. A M16 castle nut will be fitted with a 3mm split pin to prevent the nut from loosening.


Rough test fitment photos





More pics, info and updates as they come.
_________________
https://www.halfdonethings.com/

Post Wed Feb 06, 2013 12:34 am 
 View user's profile Send private message
marto
Experienced Roboteer


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


 Reply with quote  

Few more photos.

Wires, LEDs, Connectors.


Potential way to layout ESCs/Batts, in our box.



The gearmotors as they arrived.


Early 150A dev times.


Early Layout Mockup


Current POP


Realistically it may become a Combots robot. As it was already meant to be on a test frame driving but gotta try.

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

Post Wed Feb 06, 2013 12:51 am 
 View user's profile Send private message Send e-mail MSN Messenger
Philip
Experienced Roboteer


Joined: 18 Jun 2004
Posts: 3842
Location: Queensland near Brisbane


 Reply with quote  

Very good. Do you have a CAD of your robots?
_________________
So even the rain that falls isn't actually going to fill our dams and our river systems

Post Wed Feb 06, 2013 3:03 am 
 View user's profile Send private message
Knightrous
Site Admin


Joined: 15 Jun 2004
Posts: 8511
Location: NSW


 Reply with quote  

At this stage, we are just building the robots around the parts on hand. Final design, final shape and even some final parts are still up in the air.
_________________
https://www.halfdonethings.com/

Post Wed Feb 06, 2013 8:14 am 
 View user's profile Send private message
Daniel
Experienced Roboteer


Joined: 30 Aug 2005
Posts: 2729
Location: Gold Coast


 Reply with quote  

I'm jealous. I wish I had those motors and speedos for Huntsman. Wish I could go to robogames again. If you need any help just ask.

Post Wed Feb 06, 2013 9:58 am 
 View user's profile Send private message Send e-mail
Knightrous
Site Admin


Joined: 15 Jun 2004
Posts: 8511
Location: NSW


 Reply with quote  

We have to thank M&J for following on with the winch motors. After they found a new source of winch motors on ebay for Wanda, I went hunting for the biggest ones I could find, 1.3Kw. They are only $110ea shipped, but still require a bit of mucking around to make them useable. However, they are 4-pole motors, have axial brushes and have a funky 3 stage dual gearbox. I'll get some photos up later of the tear down I did on the motors.
_________________
https://www.halfdonethings.com/

Post Wed Feb 06, 2013 10:13 am 
 View user's profile Send private message
Knightrous
Site Admin


Joined: 15 Jun 2004
Posts: 8511
Location: NSW


 Reply with quote  

Winch motor post!

The full sized 4000lb winch. It's about 6-kg


The spool and secondary gearbox removed.


The end plate removed to reveal a single 5.1:1 stage reduction


Behind the first stage is the pinion gear, which is fitted into a 1-way sprag clutch


The pinion is fitted to the clutch using a 6MM hex shaft


Below the clutch reveals the motor shaft, which is a double D.


Stripping the motor down. You can see the big terminals on the brush housing, the 4 brushes, a crappy bush bearing for the armature (might look at replacing this with a ball bearing)


The armature with it's large radial commutator


~3.7KG for the base, will be closer to 4.5KG by the time we are done with it.


The secondary gearbox


This is how it is setup in the winch configuration, the first stage drives the little hex bar through the center of the spool and connects to the secondary gearbox with the remaining two stages.


The secondary gearbox casing is nearly the same, except a bit longer for the dual stage setup.


All three stages can be jacked together successfully, so a big assed 135:1 gearbox could be built for a lifter or clamper



In fact, I sort of have already worked that out...


And a quick look at the next face plate design with 25M bearings

_________________
https://www.halfdonethings.com/

Post Wed Feb 06, 2013 10:39 am 
 View user's profile Send private message
Glen
Experienced Roboteer


Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect


 Reply with quote  

Awesome work in here doods Very Happy Not much to fault in those motors, they look fusking huge lol. Maybe replace the bush with a needle roller would be easiest if there isn't room to machine it out for a bearing. I imagine jigging it up in the lathe to do that would be pretty tricky anyways.

Let us know if you need any help anyway. Should have my laser cutter next week if you need wood templates or anything XD (dunno haha)
_________________
www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Post Wed Feb 06, 2013 10:48 am 
 View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
miles&Jules
Experienced Roboteer


Joined: 19 May 2010
Posts: 3973
Location: ipswich QLD


 Reply with quote  

sexy real sexy Cool

Are ya gonna weld the hubs onto the shaft?
_________________
Miles Blow - Julie Pitts
www.mulesfilm.com.au
www.wombokforest.com.au

-Pickasso- Vivid Sportsman champion 2015

Post Wed Feb 06, 2013 8:11 pm 
 View user's profile Send private message Send e-mail Visit poster's website
Jaemus
Experienced Roboteer


Joined: 01 Apr 2009
Posts: 2674
Location: NSW


 Reply with quote  

Nice. I think i need one of these winches to make a cargo hoist for my house

EDIT: Also, are you able to weigh the gearbox stages and motor seperately?

EDIT EDIT: Also im interested in the diameter of the ring gear
_________________
<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Wed Feb 06, 2013 9:17 pm 
 View user's profile Send private message Send e-mail MSN Messenger
Knightrous
Site Admin


Joined: 15 Jun 2004
Posts: 8511
Location: NSW


 Reply with quote  





_________________
https://www.halfdonethings.com/

Post Fri Feb 08, 2013 11:37 pm 
 View user's profile Send private message
miles&Jules
Experienced Roboteer


Joined: 19 May 2010
Posts: 3973
Location: ipswich QLD


 Reply with quote  

like the slices of ali for the face plates. Gonna be a beauty.
_________________
Miles Blow - Julie Pitts
www.mulesfilm.com.au
www.wombokforest.com.au

-Pickasso- Vivid Sportsman champion 2015

Post Sat Feb 09, 2013 9:29 am 
 View user's profile Send private message Send e-mail Visit poster's website
Daniel
Experienced Roboteer


Joined: 30 Aug 2005
Posts: 2729
Location: Gold Coast


 Reply with quote  

I know it might not fit into your plans but I still have the undersized waterjet bisalloy parts from Huntsman sitting around my garage, including the 80cm, 7kg axe. You two can have them if you want.

Post Sat Feb 09, 2013 10:11 am 
 View user's profile Send private message Send e-mail
  Display posts from previous:      

Forum Jump:
Jump to:  

Post new topic   Reply to topic
Page 1 of 17

Goto page 1, 2, 3 ... 15, 16, 17  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.