Updates: for lack of better words.

Post Concert more, back to bot building and school packing. Yeah sure I have a month until college actually begins, but for me the terms are slightly different so I'll have to get ready by the end of July. Still, there are priorities to be had like finishing Pookie for Wazio.

Last report showed the basic frame plates cut and assembled with the motors and batteries placed. Well since then, I moved those around and I even wired up THE ENTIRE ROBOT!




That is how it looks right now (picture literally taken 2 seconds ago). Fully packed in, drive motors working, and with bottle cap wheels attached. It feels pretty robust and seeing it spin up, I feel like this is a quality competitor if driven correctly.





The electronics are extremely compact. I had to go thought many painstaking efforts to get everything configured the way I wanted them. I had to remove all the pins from the receiver and solder directly to the board. The PWM leads themselves were cut to about an inch long to reduce the amount of wiring running around. I even practiced board stacking where I soldered one board on top of another so save space.







You can see the "power poles" right here between the two boards.





All these modifications allowed the robot to stay really compact. (I need to take a sizing picture some day) All that is left to do is dremel the blade mounting screws off, and to make a new top cover.



Even Pacman got a makeover in time for Atlanta's Dragon Con Robot Battles event. I mounted the motor on top this time to simplify the belting system and added a self-righting hoop to keep the robot on one orientation. Don't worry, running inverted was never a good strategy so it was not like I lost anything. These new makeovers prompted a new color make over so I happily used a different color plastic and some silver to create the illustrations.



One last thin I might do is upgrade the battery for higher voltage and more capacity. After all, I do have 8oz unused.

Bot On! (Suckage)

The last post was far too long. But this is okay, because there is not much to report on this one.

Pacman: 1 win, 2 losses. sucked
Normally I would not be this mad, but the robot did not even perform well. The only robot to have a worse outcome was my old ant Jui Kuen, but I was satisfied with him because he was a good bot. I got a great hit that sent Piranha along the hypotenuse of a 8' square. But Pacman was not one of those cases. First match, the reception was bad and as a result I was pushed out. Every other match I broke a belt after some semi-impressive hits. Even got embarrassed when I was flipped and the set in receiver high centered the robot. I will still upload the video, but something on this robot just HAS to change.

Where'd ya go Jamo?

I've been busy. That is no secret. Many of you have no idea, because I seem just as (un)responsive as usual, but truth is, I have been quite busy.

Last post, I detailed some of the tasks I had to hit for the upcoming Gulf Coast Robot Sports competition at the Hobby Marketplace. Between then and now, I got all three robots completed! Woohoo! Okay, technically Pacman is charging, but who gives...

So to knock off the easy ones first, P150 and DDT are complete. Last post I outlined the new motor mounting scheme for DDT. The motors dried in, and I slapped some tape over the back. Looks brand new and ready for combat! P150 required a little more work, but nothing strenuous. I took apart my last spare GWS PicoBB servo, and replaced the topmost portion of the casing. Then I glued the motors in to complete the robots. Some quick test drives, and charges, they appear to be ready to kick some butt!












Pacman was not as easy. After a trek to Skycraft surplus store, I bought some replacement o-rings to use as drive belts. However they were too tight! How terrible! I tried to remelt some old belts but it turned out like junk. Apparently the material doesn't take too kind to fire, and instead of melting, just bursts into flames (sorry, no pictures).

I went to Home Depot to try and get the rings I needed: no dice, they were just too small. The largest they had was about 1.25" dia, when i needed 1.5" or something around that. I was about to leave, when my mom had the brilliant idea of using bathtub washers. Sure they start out very wide, but some quick work of the sheers, and suddenly they are custom made rings!










Some additional upgrades include a nicely polished output shaft, some added flats to help aid torque, upping the size of the weapon hub set screw, and maximizing the output pulley diameter for quicker spinup times. Check it out!

To Bot or not to Bot...

... that is the question.

Today is Tuesday and this Saturday is the Gulf Coast Robotic Sports competition hosted by the Hobby Marketplace. I am still trying to decide if I will compete or not. I love to fight robots, but somewhere between losing $30 (in entry fees) and my parents wanting to take me to my driver's test, it makes me second guess. Either way, I am still preparing the robots for Dragon Con in August.

First up, is my Antweight, DDT. At BARF, he did a good amount of damage, but after 5-6 competitions hte parts are wearing down. The motor mounting blocks actually fractured and broke completely on one side; into 5 pieces to be exact. I could not let this happen again.



Here are the UHMW motor mounts I created. Same overall dimensions, but the different material should make it more shock resistant. And yet, I didn't use them.




Here is what I actually did. I bought some standoffs to hold hte top armor, and then simply glued hte motors down like in some realier robots. It looks cheesy, but has actually been the best method in my opinion. No motors broken, and never has a motor come lose. It is just a pain to fix if a gear explodes.



Pacman got a weapon system change. When I got my wisdom teeth removed, I swung by the surplus store and bought some tighter O-rings so the weapon couldnt spin up faster. A lack of friction was costing Pacman some good seconds. But the O-rings were too tight. They transfered all the friction and the darn Wattage Cobalt actually sucked all of the current from the batteries. Ugg, I need another solution.

Easy solution. I changed the ratio of hte belts. The old setup was somewhere around 3:1. Decent, but for more torque, I made the blade pulley larger. Now it has something around a 7:1 ratio. This will mean lower top speed, but really, I never even GOT to top speed at BARF. Recent tests show that this configuration is a solid idea anyway.

Last, is P150. I have never introduced P150 here before, but simply it is hte smallest robot of the fleet. A 1/3 scale of DDT in a sense, definately one of hte most dangerous Fariweights in the nation.

It is in pieces... See the pretty pile of parts? Last GCRS, I foolishly put it in the Antweight rumble, where it made lots of pretty sparks, but it smashed both of its drive motors and its weapon motors. I already fixed one drive motor, but the bearing retainers on the weapon and the casing on the second drive motor are poo.




More updates to come later. And oh, the videos from the last event are uploaded on my Youtube. Cheers!

BARF in the Bay Area

Bay Area Robot Fights (BARF) was today as you may remember from a previous post. In a field of 21 fellow robots, here is how my two bots did:











DDT: 3 wins - 2 losses
The crowd pleaser that never fails to please... okay I will take that back. The first match against "Babe the Blue Bot" was less than ideal because my belt for the weapon derailed like so many times past (I thought I had that fixed!). But the other 4 matches, the bot never failed to bring a smile to the crowd, bouncing off walls and making sparks and parts fly off opponents. "Cause for Concern" was one such opponent who had his 1/2" lexan frame cracked and his bolts sheered. This bouncing was the demise however when a prime hit on "Verbal Irony 4" sent DDT flying into the pit. It was only a matter of time before it happened anyway.





Pacman: 5 wins - 2 losses
We ran round robin for the beetleweights since there were no as many. Surprisingly, this robot had actually captured the crowd's heart although not being a very good spinner (belt problems, hot motors, slipping blades). The crowd, on hearing Pacman's name announced, would chant "Wakka wakka wakka!" because that's the sound Pacman makes, ha ha. I was even surprised to see that people wanted pictures of me and the robot. I will never forget this one young woman (I'm guessing early 20's) came up to me in the pits after a match and excitedly asked for a picture with me and the robot. I said yes because it would make her happy and because I was honored to know someone wanted a picture with me (plus she was, in my opinion, decently attractive XD).


But anyway! Pacman went through opponents by total win or total loss. He ate through some good aluminum pieces of opponents, a few sparks, relatively stable robot. But some really good pushers put him in the pit. Okay, one of those losses probably should not have happened, but it did. When fighting "Push it to the Limit", an impact shook off one of my wheels. But the same impact left him high centered. We freed him but i couldn't move because the loss of one wheel made the robot sit at an odd position so Pacman got pit'd shortly after. Oh well, we had fun anyway.


Overall it was a heck of a fun event. I always feel a bit strange walking into Anime conventions because the people are way too nice and energetic (and costume-y). But I really enjoy this crowd to be honest. They are overly enthusiastic which makes me feel better about the entertainment that I help provide. They really appreciate it unlike some other events.

Now I know I am not too big an anime nut, but I did see some nice costumes that I did not take pictures of. Fran from Final Fantasy (with her bow), a ton of Naruto characters ranging from Naruto himself to Sakura to Atasuki, Wong Tao Yen from Portal, and many more. I really liked the guy who dressed as the Scout from Team Fortress 2. Bonk! XD

Videos to come! I still haven't uploaded them yet. Check my Youtube page for more! And additional pictures here!

Pacman

Wakka wakka wakka...

Coming to an event... tomorrow?

More pictures on my photobucket and when my mom's camera finishes charging.

Also...




Frickin' awesome!