Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - jiocca

Pages: [1] 2 3
1
Progress Reports / Nova Robots: common thread
« on: July 08, 2018, 02:51:33 pm »
So I'm finally done for now messing with my CNC mill project. Which means its time for robot updates!!

First on the docket is an update to Mr Slant. Mr. Slant kept shredding belts at Bot Blast last year but I didn't want to switch to a timing belt because that would be too easy. Also the inside of Mr. Slant is an absolute mess and making a fancy hub motor would let me clean everything up. So off to hobbyking I went to pickout some suitable motors
 I ended up picking: https://hobbyking.com/en_us/ack-4008cq-600kv-cw-brushless-outrunner-motor.html

Its 46mm OD was basically perfect for the space I had and it let me keep my blade height unchanged.

I laid out the assembly in solidworks
https://imgur.com/a/v04XArI

The assembly relies heavily on press fits. I was pleasantly surprised the mill is accurate enough where all the press fits seemed to work out fine.

So I clamped the prototype into the mill vise (because this blade scares the crap out of me), hooked the motor up to the chassis of Mr. Slant V1 laid a big sheet of polycarb between me and it and let it rip.

https://youtu.be/gpCgx0g7_wk

I spun it up several more times and even with the the alligator clip connections it seemed quite happy.

Next step is to modify the chassis and see if it can handle some hits.

2
NERC (Northeast Robotics Club) / Moto '16
« on: November 03, 2015, 05:33:10 am »
New Moto Message

Greetings all,
Its that time of year again. Motorama '16 registration is now open www.buildersdb.com . I will be handling registration again this year so please direct any reg questions to me first. Moto will have the same format as last year with fairies, ants, beetles, hobbies, 30s, sportsman and Bots IQ 15lb classes.

REGISTRATION: Closes 12/23/15
Simply put if I have not received your paperwork and payment by then I cannot guarantee that you will be allowed to compete and you may face penalties.

To register to fight you will need to complete the following paperwork:
NERC Liability Form
http://www.nerc.us/forms/NERC_Liability_Form.pdf

Motorama Release Form
http://www.nerc.us/forms/Motorama_Release_Form.htm

http://www.nerc.us/forms/safety.pdf (this form should not be mailed to me it should be brought with you, with 1 form for each robot)

CRITICAL REMINDER: For participants under the age of 18 the Motorama liability form must be Notarized or your registration will not be approved.

Registration also requires the following fees:
Fairies - $22
Ants - $22
Beetles - $33
12s - $45
15s - $45
30s - $60
sportsman - $60
Parking costs an additional $20
additional pit passes $40 each

Same rules as last year:
One bot per class gets you one pass.
Example:
One bot and 2 crew members only gets you only one pass.
Two bots and 2 crew members gets you two passes.
3 bots and 3 crew members gets you only two passes.

Checks should be made out to: Northeast Robotics Club
Paypal payment should be made out to: robotconflict at Gmail.com

All paper work should be mailed to me:

James Iocca
20 Berkley Dr.
Yardley PA
19067

If you need to contact me please do so through the nerc facebook, nerc forum or through my email:
ioccajr at yahoo.com
https://www.facebook.com/groups/NorthEastRoboticsClub/

http://forums.delphiforums.com/n/main.asp?webtag=cjrc&nav=start&prettyurl=%2Fcjrc%2Fstart&gid=2047810867


So this is my first gentle reminder. Send in your paper work as soon as possible or suffer me sending you repeated annoying database emails.

Jim

3
I'm not really a fan of either of those.
I feel like you are closer with the simplified rules though.   
I still feel strongly that we would need to convey that a sportsman robot should be focused on the weapon and not on the drivetrain. Weapons that are effective with a weak or slow drive train are very desirable. I don't want to limit the power of drive trains as fast bots are more entertaining but I feel like that is more the point of the sportsman class in my mind.  The weapon should be effective even if the drive train is not. Flippers, large range of motion lifters, crushers, hammers, saws, drills all effective with a weak drive train.  Slow Lifting threshers, short reach lifters are not what I want to see in the class. This is only my opinion but its where I'm at.

My issues with the judges deciding matches where a "wedgie" bot slams it opponent around the arena for three minutes and loses is not going to make much sense to an audience.  And if a powerful "wedgie" bot manages to KO an opponent through box rushes then it won't make much difference what the judges say.  Having them forfeit the match  is another thing that wont make much sense to the audience.

Jim


4
Addressing it as a scoring issue is an interesting thought. The issue I guess would be if someone manages a knockout by ramming then a modified scoring system wouldn't help.

Jim

5
I have been trying to think of new way to say this but I really haven't come up with anything better.

If the point of the weapon is to passively remove the wheels of the target robot from the floor using only the forward momentum of either robot then it is not in the spirit of the class.
If the point of the wedge like surface is to support the base of the target robot so that the weapon system can be properly deployed and thus whether or not the target robots wheels are in contact with the ground is of no consequence.

For example the point of lockjaws forks are to allow him to crush you. If a target robot has moderate ground clearance and its wheels still reach while on its forks his weapon system can still be deployed to full effect. The same goes for Clocker, having big wheels that reach through his forks wont help you when he picks you up.

Now obviously there is a practical upper limit to this but I'm just trying to capture why these robots were allowed and why others like the original Nyx and shish-kabot were eventually asked to redesign.


6
Progress Reports / Re: Twisted Sick Robotics
« on: March 20, 2015, 04:14:01 pm »
Quote
your move Jim
-Kyle

Ok :)

7
Progress Reports / Re: Twisted Sick Robotics
« on: March 04, 2015, 09:44:19 pm »
NOOOO!! don't lose the inclined blade!!!

8
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 22, 2015, 03:51:51 pm »
Blecch! that was an embarrassing mess. So with all my stressin5g about making the OSMC and Arduino and the battery packs which where all new to me I neglected to do the stress calculations on the weapon chain.

I'll walk you through it.  EV warrior stall torque = 6ft-lb. First stage reduction 3:1 = 18 ft-lbs Second stage reduction 3.5:1 = 63 ft-lbs or 756in-lbs . Radius of sprocket pinion 0.6875in total load on chain neglecting shock = 1099lbs.  Safe working load of #35 chain 199lbs.  Embarrassingly dumb.  With the shock loads I expect it was many times worse.

I did find another point of failure that was a combination of a bad weld and not properly preparing for glancing blows. But at least that one was surprising.

9
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 19, 2015, 07:55:18 am »
yeah that was a typo
Punched though restrained 0.025" thick pretty easily. With the flex of a top plate it will probably be harder to get through.

I'm not sure the heavyweight version of Golem could Have gone through 0.25" Ti. It made it through 0.25" 7075 back in the day but that's a far cry from titanium.

10
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 18, 2015, 11:04:28 pm »
I had to know. I had some 0.25 Ti lying around and I put it flat on my plywood test floor. It goes through the ti and into the plywood pretty well. I think it'll be ok if I can get a good square shot.


11
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 18, 2015, 10:51:07 pm »
So I don't think i'm getting the power I want out of it. I mistakenly ordered a larger gear for the second stage and didnt have the money or time to change it. I think it bumped the ratio up to ~20:1 and its robbing me of my top speed.  I really have not idea if its hitting hard enough.













maybe

12
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 18, 2015, 10:35:59 pm »
BOOO :'( to your additional armor.

13
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 15, 2015, 09:02:08 pm »
The spike currently touches down on the tail though it can reach the ground without the tail..  I still need to dial down the return power in the arduino so it doesn't beat the tail up.
The Spike and Axe are interchangeable. I suspect the axe will be my style choice and the spike my effective choice
Jim

14
Progress Reports / Re: Novarobots: Iron golem 30lb Sportsman
« on: February 15, 2015, 07:01:09 pm »
And we're pretty much done here.
I have about 1 oz to lose and I still haven't cut the motor shafts down.
Need to break the frame down and loctite everything but it comes apart really easily. Now that I typed that I'm not sure that's a good thing in a combat robot.

Driving
http://youtu.be/2U7ytjudOnA

Test fire with tail
http://youtu.be/MAdNsuMz1iU



well that was fun.


15
Progress Reports / Re: Twisted Sick Robotics
« on: February 14, 2015, 01:45:11 pm »
I want this robot to work so badly. The Ripto design has been a favorite of mine for a while. although not as much as the inclined blade spinner.

Pages: [1] 2 3