Newbies Build Diary.

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teamfirebrain
Posts: 10
Joined: Sun Oct 20, 2013 2:12 pm

Newbies Build Diary.

Post by teamfirebrain » Wed Jan 02, 2019 7:19 pm

Hi there.
I'm Matt and despite the fact that I am a Newbie, this is not my first Ant.
My First ant, Lightning Spark, was pretty exceptionally bad. However I made it 5 years ago and had limited funds and resources, so that is to be expected i guess.

Now that I have more funds (my student loan) and resources, I thought I would make another ant. Some of the old bits such as the receiver and battery pack are still intact from Spark, however all the servos have gone so I thought I would replace them. I toyed with the idea of using Gearmotors but decided that essentially, I couldn't be bothered.

I did a bit of research and decided that I wanted a push style bot (which I am currently designing using my limited knowledge of CAD) with a lifter that would mainly be used as a self righting mechanism. The best idea i could come up with was an acrylic lance that lifts up and down, not very effective from my (limited) experience but a good starting point. (Also Sir Lantsalot seems like a cool name :D )

Ive ordered a weapon servo, a Turnigy TG9E, and was just wondering if anyone else has used this for a weapon, and if its any good!
Also, I'm looking for some easy to hack/Pre Hacked 360 servos for the drive, any recommendations are welcome :D

Will post the Models once i've finished them.
Cheers
Matthew Walters
Team Fire(B)Rain
Ants- TBD-In Progress

barryg
Posts: 3
Joined: Tue Dec 11, 2018 11:07 am

Re: Newbies Build Diary.

Post by barryg » Fri Jan 04, 2019 11:56 am

Hi Matt,

I may not be the best person to advise on this as i'm fairly new to antweights too, but i found this version of the SG90 really easy to mod:
https://www.ebay.co.uk/itm/SG90-9G-Micr ... 2749.l2649

They have a shaft with a flat on to drive the potentiometer (position sensor). Cut this shaft short so that is doesnt move the pot and you are good to go. No need to solder and no mechanical stops to cut out.

I would recommend the speed mod if you do use sg90's, otherwise they are a bit slow. To do this you bond the output gear to the one on the same shaft as it (using epoxy/araldite) and remove the top gear from the middle shaft.

teamfirebrain
Posts: 10
Joined: Sun Oct 20, 2013 2:12 pm

Re: Newbies Build Diary.

Post by teamfirebrain » Mon Jan 07, 2019 9:36 am

Cheers for the recommendation! I got a couple off those as well as some FS90Rs which are 360 servos. Going to decide which to use for this bot depending on reliability mainly as I don't really want to be replacing the servo every five minutes.
Wheels is my next problem. Does anyone have any recommendations for wheels that would be suitable to use with a servo? I don't really want to spend too much on them but i would like some that are fairly decent, if at all possible.
Cheers

(Also CAD design is coming along quite nicely, will post when finished!)
Matthew Walters
Team Fire(B)Rain
Ants- TBD-In Progress

teamfirebrain
Posts: 10
Joined: Sun Oct 20, 2013 2:12 pm

Re: Newbies Build Diary.

Post by teamfirebrain » Thu Jan 10, 2019 11:45 pm

Hey again.
As I have never properly used CAD before, this took me quite a while and although it isn't very detailed, something i haven't quite figured out yet, this is roughly what the currently nameless ant will look like. I don't imagine this 'weapon' will do much, but at least it acts as a self righting mechanism.
Now my exams are done for a bit, i'm probably going to start with the construction, though this could take a while. Hopefully to be ready for the next AWS!
Image
Matthew Walters
Team Fire(B)Rain
Ants- TBD-In Progress

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