Search found 128 matches

by T_Y
Sun Nov 10, 2019 11:49 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

I think for AWS 60 I'll just use two Arduinos, one for each DRV8833. This will let me re-use my existing code to PWM in both directions to some degree, so I can focus on getting the mechanum wheel design to work. I've assembled the wheels and printed the chassis off. Temporarily fixing the component...
by T_Y
Thu Oct 31, 2019 12:17 am
Forum: Antweights
Topic: Ellis's (Team BANANAPHONE/A12) build log!
Replies: 32
Views: 4044

Re: Ellis's (Team BANANAPHONE/A12) build log!

That motor doesn't look healthy!

Looking forward to seeing Solderburn V2 in action!
by T_Y
Thu Oct 31, 2019 12:15 am
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

I thought I needed 2 PWM pins per H-bridge :S *Checks Adafruit DRV8833 documentation* Huh. That makes things a bit simpler! So it looks like I only need 1 PWM pin per H-bridge - the Arduino Pro Mini has 6 so I'm good then, thanks for pointing that out! Each DRV8833 board also has a sleep pin, which ...
by T_Y
Mon Oct 28, 2019 11:30 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

The plough will be hinged, so it scrapes the ground, but alas, I won't be able to power the plough - there's just not enough room or weight to do so!
by T_Y
Mon Oct 28, 2019 7:51 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

So, CAD work has progressed, I now have the design of the whole bot and have a chassis printed off ready for assembly. https://i.imgur.com/zy3wB9O.png https://i.imgur.com/OY3srQp.png It prints off in a single piece with no supports, taking nearly 8 hours! It took me a while to settle on the design, ...
by T_Y
Thu Oct 17, 2019 10:51 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

So I found an omni wheel on the Sketchup model library (search "Omni Wheel 2.0", model is by "machinebot...") and had a go at modifying it for 3D printing. https://i.imgur.com/hDNTuaE.png https://i.imgur.com/b3WhG2V.png Original is on the left, modified is on the right. I've bulked out the roller su...
by T_Y
Mon Oct 14, 2019 10:44 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

Quick update, HYTTIOAOA is now complete, aside from the aluminium wedge. For that, I'm waiting for the aluminium servo horn to arrive (should be soon), as the plastic one currently attached is slightly shorter. In the meantime, I've been procrastinating about the mechanum wheel bot. While browsing t...
by T_Y
Sun Oct 13, 2019 3:50 pm
Forum: Antweights
Topic: 3D printing robots
Replies: 4
Views: 5887

Re: 3D printing robots

I also started out with Sketchup Free. It's not be best out there but I made do. Most tutorials on the internet tend to be for the paid version, however. I've just gotten Fusion 360 (it's free for hobbyists!) so I'm learning how to use that. Haven't printed anything off Fusion 360 models yet though....
by T_Y
Wed Oct 09, 2019 7:06 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

@MarkR Ah right, fair enough. For the prototype, I think I'll stick to N20s, I already know which motor drivers to use and how to connect it all up (also, I think I'd need 4 separate driver boards for the steppers as opposed to the drv8833 I use for DC motors, which do 2 separate channels on one boa...
by T_Y
Sun Oct 06, 2019 4:07 pm
Forum: Antweights
Topic: T_Y's Build Log
Replies: 189
Views: 101345

Re: T_Y's Build Log

I think I'd probably use steppers, I've seen a load of N20-size steppers (fit the same gearboxes as N20) on Aliexpress etc, but I've not tried them. I didn't realise you could get stepper motors smaller than those cube ones you always see, that'll be something to explore - I was going to use N20s I...