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Messages - Ravi_B

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For Sale / Wanted / Re: Big Electric Motors and other related parts
« on: October 20, 2017, 04:32:34 pm »
Message me when you're back online.

(or email, Im not on SPARC much these days)

Progress Reports / Re: Team Balhogs: A Maiming
« on: February 06, 2017, 11:25:28 am »
Cool bot guys, glad to see you're still around!

Cya at moto, drinks will be had.

General Robotics Discussion / Re: Low Cost 3D Printer
« on: March 03, 2016, 04:19:58 pm »
So I have this half built Reprap Pruisa I3 decked out for Nylon and Polycarbonate filament. A few weeks ago I decide to check online and see about getting the final pieces. Jumped on AliExpress and noticed you can now buy a full reprap prusia kit for $200 shipped. Which is fairly solid.

My experience with reprap is they will print well, IF you have the time to tune and calibrate and IF you have the patience to repair it every week.

But its cheap...

Progress Reports / Re: Team Brain Damage
« on: February 26, 2016, 09:15:17 am »
Nice build report, sounds like Magneto had all kinds of little issues.

Sometimes that just how it is. Also looks like Triggo got an a** whooping from Ripto!


Missed being there, next year.

Progress Reports / Re: All Black Robotics
« on: February 26, 2016, 09:12:51 am »
Well the whole motorama thing came and went, didn't get to play unfortunately.

It was torture seeing all the pictures and video over the weekend, looked like there were some deadly bots making the rounds this year.

Time to focus on another project, a big one.

Progress Reports / Re: All Black Robotics
« on: February 19, 2016, 07:37:52 pm »
Thought I posted this earlier.....

I won't be at Motorama this year. I'm ready, Placebo is ready however everyone but Jason and I had to cancel. That said Jason is still at home building. So Motorama isn't happening for me.

Here's a video of the thing spinning up!


Progress Reports / Re: All Black Robotics
« on: February 18, 2016, 03:55:02 pm »
^ Lets do that, much obliged

Progress Reports / Re: All Black Robotics
« on: February 18, 2016, 01:33:44 pm »
So I figured out why the blades so out of balance. Isn't the blade, I forgot I grabbed an old busted up weapon shaft from you Zac when I bought the blade.

Entirely forgot the weapon shaft needed to be replaced, now its too late to spin up a new one...well I could maybe manage to turn something but bleh its fine ;)

North America / Re: Great Canadian Bot Brawl
« on: February 16, 2016, 03:56:57 pm »
2016 events

June 18th 2016 (minor) @ Cambridge Arts Fest
Sept 10th 2016 (major) @ MakerExpo

Progress Reports / Re: All Black Robotics
« on: February 16, 2016, 01:01:07 pm »
At first I thought it may have been a voltage thing, switched packs and had a similar issue. Will charge back up and see to it later today, work out the kinks.

Hate having to drive back Sunday night but, yeh thats how it is....

Progress Reports / Re: All Black Robotics
« on: February 16, 2016, 11:26:56 am »
Rewired the 12lber over the long weekend. Less of a rats nest, had the chance to spin up with a full battery. The motor drew too many amps and the ESC cut out when trying to 0-100% right off the bat. Had a higher amp ESC I installed which seemed to have solved the problem.

In future I want to drop in a higher KV motor and implement the single tooth blade.

Taking the bot to the spray paint booth tonight and packing up for the weekend. Sadly we'll be leaving on Sunday (Back to work Monday).

Now that the little bot is settled...back to other things.

Progress Reports / Re: Team Brain Damage
« on: February 16, 2016, 11:20:28 am »
Thats a real shame Zac, but sometimes thats how it goes.

As always thanks for taking pictures of the process.

Progress Reports / Re: All Black Robotics
« on: February 12, 2016, 11:35:49 pm »
Wish I had the 30lber this year! Sadly no time for that.

Don't think I'm getting the single tooth blade in time. Oh well, wobble it is! A friend has a prop balancer that might just be big enough to fit the blade so I'll give that a go.
The Canadian contingent will be a bit light this year unfortunately but we'll see you there!

Progress Reports / Re: All Black Robotics
« on: February 10, 2016, 04:09:49 pm »
RPM works out to about 1600rpm, touch slower then I'd like but I have 2 motors for it already.

Thanks Kyle, I like the funky looking bots.

The blade is a touch warped from HT it seems, might be that. I have a single tooth blade I'm trying to get laser cut this week but I'll let you know!


Rats nest of wires installed last night, ran it around for a bit. Need to sort out trims and mixing settings. Might drop drive motors into low gear for drivability sake.

Video attached, batteries are not charged. Turns out I used all my XT60's and don't have any for my charger....
You can see the unbalanced wobble if you look closely, noticeable when the bots not moving. Hit on the rando-steel popped the un-secured disconnect.

Progress Reports / Re: All Black Robotics
« on: February 09, 2016, 09:39:26 am »
12lber Placebo

Finished the wiring harness last night and spun it up. Everything works nicely so far except the blade seems to be un-balanced (DAMN YOU ZAC!).

Tonight I'll cut the top/bottom plates and route some wires. Then some paint and she's done.

The gearbox uses some hardened brass gears (they work just fine), the enclosure is all laser cut from delrin plastic with bushings. I'll be working up a backup gearbox with the 2nd motor.

The whole gearbox assembly slides on rails within the robot, 2 springs push the gearbox down thus ensuring the friction wheel is always in contact with the blade. Works very well actually, took a few tries to get the spring tension correct.

I'll post a complete picture later.

Build pictures:

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