Go to Post You enjoy your pepperoni pizza, I'll enjoy my cheese and peppers, and we can both agree that people that like pineapple on their pizza, while strange... are completely entitled to their opinions. - Andrew Schreiber [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Events   CD-Media   CD-Spy   FRC-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 03-12-2012, 10:57 PM
Andrew Lawrence's Avatar
Andrew Lawrence Andrew Lawrence is offline
Work it harder, make it better.
AKA: SuperNerd256
FRC #1323 (Madtown Robotics)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2011
Location: San Jose, California
Posts: 3,314
Andrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond repute
Send a message via Skype™ to Andrew Lawrence
How are bellypans made?

I'm working on ideas for next year's robot, but I'm curious how most teams make their bellypans. Most likely it's waterjetted, or laserjetted, but there may be other ways I don't know about.

Also, what material do you use, and of what thickness?

Thanks a bunch! I'll post results sometime next year when it gets made!

PS. The bellypan I'm talking about is the one like 233/254/968/1323/971(I think)/1868 etc etc.
__________________
Team 256: 2011-2014
Team 1323: 2014-Present

"The greats weren't great because at birth they could paint, the greats were great because they paint a lot" -Macklemore

Last edited by Andrew Lawrence : 03-13-2012 at 08:50 AM.
Reply With Quote
  #2   Spotlight this post!  
Unread 03-12-2012, 11:15 PM
Dr. Fancypants Dr. Fancypants is offline
Mentor / 'Tron Student / Batman
AKA: Philip
FRC #0907 (East York Cybernetics)
Team Role: Mentor
 
Join Date: Oct 2011
Rookie Year: 2008
Location: Canada
Posts: 2
Dr. Fancypants is an unknown quantity at this point
Re: How are bellypans made?

We're using 0.188" nom. (3/16") Lexan cut on a bandsaw. Substitute any ol' saw for a bandsaw. Don't saw too quickly or feed too slowly or, as with a wide majority of plastics, it will start to melt and gum up. Easy peasey.

Hope that helps!
Reply With Quote
  #3   Spotlight this post!  
Unread 03-12-2012, 11:17 PM
Jeff Pahl's Avatar
Jeff Pahl Jeff Pahl is offline
Doing the rookie thing, again!
FRC #5148 (New Berlin Blitz)
Team Role: Engineer
 
Join Date: Oct 2004
Rookie Year: 2004
Location: Waukesha, WI
Posts: 337
Jeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond reputeJeff Pahl has a reputation beyond repute
Re: How are bellypans made?

12 mm birch plywood. Cuts nice with a table saw. Screw the electronics parts down with wood screws. Quick and easy. If you need to drill a hole, the shavings are non-conductive. We used it even back when we used to make the rest of the robot out of metal. We do sometimes do some cutouts or partial cutout/rib patterns with a router.

We like to have a solid surface on the bottom of the robot when there is any chance it could be tipped over and another robot could run into the bottom, like this year. I'm toying with the possibility of cutting a set of ribs out next year on a CNC router (if I can find access to one) and then fiberglassing it. It will depend on the game and on what the weight / cost / hassle trade-off analysis ends up saying.
__________________
Team 5148 - 2014 Wisconsin Regional Rookie All-Stars!!


Mentor: 1379: 2004-2008 / 2530: 2008-2013 / 2861: 2009 / 2062: 2014-?? / 5148: 2014-??
Lead Robot Inspector: 10,000 Lakes '09 - '11 / Lake Superior '11-'12 / Northern Lights '13 / Championship '09 - '12, 2014
Attending/Inspecting 2014: Wisconsin, Championship

"Sometimes the questions are complicated and the answers are simple" -Dr. Seuss
Reply With Quote
  #4   Spotlight this post!  
Unread 03-12-2012, 11:21 PM
sanddrag sanddrag is offline
back to school ;-)
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 7,822
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: How are bellypans made?

We used 1/8" ABS and it's a little flexy.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004

Support Team 696 on DonorsChoose!
Reply With Quote
  #5   Spotlight this post!  
Unread 03-12-2012, 11:21 PM
THE DYNAMO's Avatar
THE DYNAMO THE DYNAMO is offline
omygodjimihavethebestidea ever!!!
AKA: Scott Strange
FRC #2984 (Viking Robotics)
Team Role: Leadership
 
Join Date: Jan 2012
Rookie Year: 2001
Location: La Jolla
Posts: 41
THE DYNAMO will become famous soon enough
Re: How are bellypans made?

Most people use waterjetted aluminum, which is then sometimes powder coated. I think it is probably 3/16 or 1/8 aluminum.

My team, on the other hand, is using black carbon fiber honeycomb (1/4" cell width). it comes sandwiched between two other peices of carbon fiber. it is very strong, light, and you can mount electronics right to it because it isnt conductive. be careful though, you must use VERY big washers when mounting to it so you dont pull the bolt right through it.
__________________
Like a grand and miraculous spaceship, our planet has sailed through the universe of time. And for a brief moment, we have been among its many passengers.

I reject your reality and substitute my own.
- Adam Savage

Motors are powered by a magical black smoke. when the smoke leaks out, the motors stop working.

The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.

Impossible is just a big word for small men who find it easier to live in the world they've been given than to explore the power they have to change it. Impossible is not a fact. It's an opinion. Impossible is not a declaration. It's a dare Impossible is potential. Impossible is temporary. Impossible is nothing.
~ Unknown
Reply With Quote
  #6   Spotlight this post!  
Unread 03-12-2012, 11:52 PM
PAR_WIG1350's Avatar
PAR_WIG1350 PAR_WIG1350 is offline
>e, 7h3 5up3rn47ur4l
AKA: Alan Wells
FRC #1350 (Rambots)
Team Role: College Student
 
Join Date: Dec 2009
Rookie Year: 2009
Location: Rhode Island
Posts: 1,091
PAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond reputePAR_WIG1350 has a reputation beyond repute
Re: How are bellypans made?

Quote:
Originally Posted by THE DYNAMO View Post
Most people use waterjetted aluminum, which is then sometimes powder coated. I think it is probably 3/16 or 1/8 aluminum.

My team, on the other hand, is using black carbon fiber honeycomb (1/4" cell width). it comes sandwiched between two other peices of carbon fiber. it is very strong, light, and you can mount electronics right to it because it isnt conductive. be careful though, you must use VERY big washers when mounting to it so you dont pull the bolt right through it.
I don't believe ALL carbon fiber is non-conducting (the surface is, but once you drill holes in it, that can expose conductive stuff), it's always best to check first.
__________________
rambots.net
Promo video (played in our pit in St. Louis)
Reply With Quote
  #7   Spotlight this post!  
Unread 03-12-2012, 11:58 PM
DampRobot's Avatar
DampRobot DampRobot is offline
Wild Spartan?
AKA: Roger Romani
FRC #0100 (The Wildhats)
Team Role: Mechanical
 
Join Date: Jan 2012
Rookie Year: 2010
Location: Stanford University
Posts: 1,173
DampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond reputeDampRobot has a reputation beyond repute
Re: How are bellypans made?

My team mounts electronics with Velcro on a 1/8" plastic base plate (I'm not sure if it's ABS or polycarb off the top of my head). This year, the plastic plate was held to the frame with more Velcro and (rather ugly) plywood struts to keep it from flexing.

By "Belly Pan", I assume you mean to put electronics on?
__________________
The mind is not a vessel to be filled, but a fire to be lighted.

-Plutarch
Reply With Quote
  #8   Spotlight this post!  
Unread 03-13-2012, 12:00 AM
Andrew Lawrence's Avatar
Andrew Lawrence Andrew Lawrence is offline
Work it harder, make it better.
AKA: SuperNerd256
FRC #1323 (Madtown Robotics)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2011
Location: San Jose, California
Posts: 3,314
Andrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond reputeAndrew Lawrence has a reputation beyond repute
Send a message via Skype™ to Andrew Lawrence
Re: How are bellypans made?

Quote:
Originally Posted by DampRobot View Post
My team mounts electronics with Velcro on a 1/8" plastic base plate (I'm not sure if it's ABS or polycarb off the top of my head). This year, the plastic plate was held to the frame with more Velcro and (rather ugly) plywood struts to keep it from flexing.

By "Belly Pan", I assume you mean to put electronics on?
Bellypan usually has electronics on it, but it's generally the bottom part of the robot with cut cross sections into it.
__________________
Team 256: 2011-2014
Team 1323: 2014-Present

"The greats weren't great because at birth they could paint, the greats were great because they paint a lot" -Macklemore
Reply With Quote
  #9   Spotlight this post!  
Unread 03-13-2012, 12:35 AM
Gray Adams's Avatar
Gray Adams Gray Adams is offline
Registered User
FRC #0192 (GRT)
Team Role: College Student
 
Join Date: Dec 2011
Rookie Year: 2011
Location: University of Southern California
Posts: 275
Gray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to behold
Re: How are bellypans made?

We tried some 1/8" aluminum laser cut for us (rev A had serious warping, although rivets fixed it. They built a fixture of some sort for rev B). It works pretty well if you use nylon screws to attach your electronics. I hear the new cRIO is coated so that it's non-conductive, but it's fairly easy just to toss a thin sheet of plastic underneath. We had to cut out our belly pan due to weight constraints though, and now our electronics are sitting on some 1/8" lexan.
Reply With Quote
  #10   Spotlight this post!  
Unread 03-13-2012, 12:51 AM
R.C.'s Avatar
R.C. R.C. is offline
2014... Hella Parts
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Mentor
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 1,903
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: How are bellypans made?

We do ours like like Pink -> 254 -> 968 etc...

Basically 6061 - T6 Aluminum @ 1/8th thick.

We basically start off by making the diamonds, then adding elc holes/cutouts into it. Finish the CAD, send it off to a laser guy and its all g2g from there.

-RC
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
Reply With Quote
  #11   Spotlight this post!  
Unread 03-13-2012, 01:09 AM
GRT808's Avatar
GRT808 GRT808 is offline
Registered User
AKA: Grant
FRC #3008 (Kalani Falcons)
Team Role: Mentor
 
Join Date: Dec 2011
Rookie Year: 2009
Location: United States
Posts: 46
GRT808 is just really niceGRT808 is just really niceGRT808 is just really niceGRT808 is just really nice
Re: How are bellypans made?

Quote:
We do ours like like Pink -> 254 -> 968 etc...

Basically 6061 - T6 Aluminum @ 1/8th thick.

We basically start off by making the diamonds, then adding elc holes/cutouts into it. Finish the CAD, send it off to a laser guy and its all g2g from there.
We do basically the same. 6061-t6 0.125" (our t shirt cannon is .1875, but that is over kill)

In our CAD we started with the sheet, then patterned diamonds, then spaces for sprockets, gearboxes, and then holes for mounting electronics. Takes about 45 minutes on an OMAX waterjet.
__________________
2009 Hawaii Regional Rookie Inspiration Award
2010 Hawaii Regional Chairman's Award
2011 Hawaii Regional Entrepreneurship Award
2012 San Diego Regional Entrepreneurship Award
2012 Hawaii Regional Entrepreneurship Award
2012 Hawaii Regional Chairman's Award
2012 World Championship Judges Award
Reply With Quote
  #12   Spotlight this post!  
Unread 03-13-2012, 01:16 AM
Gray Adams's Avatar
Gray Adams Gray Adams is offline
Registered User
FRC #0192 (GRT)
Team Role: College Student
 
Join Date: Dec 2011
Rookie Year: 2011
Location: University of Southern California
Posts: 275
Gray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to beholdGray Adams is a splendid one to behold
Re: How are bellypans made?

Quote:
Originally Posted by GRT808 View Post
We do basically the same. 6061-t6 0.125" (our t shirt cannon is .1875, but that is over kill)

In our CAD we started with the sheet, then patterned diamonds, then spaces for sprockets, gearboxes, and then holes for mounting electronics. Takes about 45 minutes on an OMAX waterjet.
We did 5052 because we put a few bends in it. I'm sure 6061 would have been ok too, but 5052 is a good option, especially depending on what's available in terms of stock and what you're doing to it.
Reply With Quote
  #13   Spotlight this post!  
Unread 03-13-2012, 01:50 AM
s_forbes's Avatar
s_forbes s_forbes is offline
<-- Safety first!
FRC #0842 (Falcon Robotics)
Team Role: Engineer
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Phoenix, AZ
Posts: 883
s_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond repute
Re: How are bellypans made?

If you don't have access to waterjet/CNC facilities, you could just stick a thin aluminum plate on the bottom. The NERDS used .060" Aluminum for a bellypan in 2008; nice and sturdy with lots of real estate to attach stuff.

1/4" plywood works wonders, lightweight and cheap! currently my material of choice for something like an electronics board/bellypan. We're sporting quite a bit of plywood on the Falcons' robot this year.

We played with some mystical Boeing honeycomb composite material this season, glued between two sheets of paper (yes, like printer paper). Extremely light and stiff. The plywood was faster and easier to use though, so it won out. Maybe next year...

__________________
- Steven Forbes

2006-2010: NERDS..........1726
2010: Turbulence............3194
2011-?: Falcon Robotics...842

Check out "Babs" the underwater robot --- and some neat robot videos
Reply With Quote
  #14   Spotlight this post!  
Unread 03-13-2012, 01:55 AM
Hawiian Cadder's Avatar
Hawiian Cadder Hawiian Cadder is offline
Registered User
AKA: Isaak
FRC #0159 (Alpine Robotics)
Team Role: CAD
 
Join Date: Feb 2010
Rookie Year: 2003
Location: Fort Colins Colorado
Posts: 573
Hawiian Cadder is a name known to allHawiian Cadder is a name known to allHawiian Cadder is a name known to allHawiian Cadder is a name known to allHawiian Cadder is a name known to allHawiian Cadder is a name known to all
Re: How are bellypans made?

We use a material called verolite which is what greenhouses are made out of, it is essentially corrugated polycarbonate. We choose this material for several reasons

.5 inches thick (roughly) means that despite being incredibly light, it has excellent rigidity.

2.17 per square foot from our supplier makes it substantially cheaper than other materials.

It is non conductive, machinable with wood shop tools, doesn't splinter or crack(it is spry enough that it would take an enormous amount of force to reach its ultimate yield point.

our dual belly pans(one on top of the other) weigh < .1 lbs each, and the 15mm thick variety of verolite that we use is stronger than half inch thick particle board by far, and although it flexes more it has higher ultimate yield properties than almost any type of plywood.

This year almost 2 full 4*12 sheets made it onto the robot.

http://www.emplastic.com/images/library/BC_Twinwall.jpg
Reply With Quote
  #15   Spotlight this post!  
Unread 03-13-2012, 01:57 AM
RobotBill RobotBill is offline
RobotBill
AKA: Bill Aucoin
FRC #2377 (C Company)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2005
Location: Annapolis, MD
Posts: 8
RobotBill is an unknown quantity at this point
Another way to cut sheet plastic is to use a very fine blade, mounted backwards, on a circular saw.
Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 09:24 AM.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi