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by peterwaller
Fri Jan 04, 2019 9:01 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

Having had second thoughts about how well the fleaweight spinner would stand up as part of an antweight cluster I deided to design a new cluster from scratch with a slightly more even weight distribution. Here is FlipAntFlop a 97.5 gmflipper and a 45.2 gm double ended wedge both printed in ABS with ...
by peterwaller
Mon Dec 17, 2018 2:39 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

Although the balance was much improved it was still far from perfect and when sat in hard contact with arena floor it started to bounce more. I had decided to have a front support that was sprung so printed one that could be attached using double sided foam tape and this reduced the bounce. https://...
by peterwaller
Fri Dec 14, 2018 3:56 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

Both my spinners did very badly at the Dorset event. Combatant was really nicely balanced and set up but the hardened steel lathe tools snapped and were useless. I have now reverted to a 2mm thick spring steel bar which also seems nicely balanced and is hopefully unbreakable. https://nqu8lw.db.files...
by peterwaller
Mon Dec 03, 2018 8:50 am
Forum: Antweights
Topic: Arena surface material
Replies: 3
Views: 224

Re: Arena surface material

I use hardboard in mine using the smooth side and paint it with matt emulsion.
It isn't fixed in so can be removed for filling and repainting after each event where spinners are used.
by peterwaller
Sun Nov 25, 2018 4:14 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

When I have used PLA in the past it has shattered. It is also a lot to do with thickness and angles had the flipper been low enough to get under the spinner it would have survived much better.
by peterwaller
Sun Nov 25, 2018 10:14 am
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

The drum spinner went out before it faced a spinner but as a test I had printed the flipper on my elastic powered flipper in both the ABS with Kevlar and the ABS with Polycarb and after the main event put them up against a really nice vertical spinner. The first thing that became apparent was that t...
by peterwaller
Sat Nov 24, 2018 8:39 pm
Forum: Events
Topic: Dorset Robot Championship - 24th November 2018
Replies: 8
Views: 885

Re: Dorset Robot Championship - 24th November 2018

Great event thanks the all those who helped organise it.
by peterwaller
Wed Nov 21, 2018 8:34 pm
Forum: Fleaweights
Topic: Peter Wallers Fleas
Replies: 90
Views: 15415

Re: Peter Wallers Fleas

The new spinner arm broke on the first hit against Razor Daves Flea. So I have made a new one in fibreglass. https://oqvr0q.db.files.1drv.com/y4mWQtXu76MSES7Mdncuj0dzqMlja2MY-oLCIjb2gg0J7ayr4v7_H90L41TiTZ1-Az14cNkJSaBaEjstTIdpSy8x4flCkyYERDXhNPpCdNoPsJ4iebGS-_CfTszqIWIjS61mjOwtXEVKXabVx7aGa6vMaJDnfJ...
by peterwaller
Tue Nov 20, 2018 1:54 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

The ABS with Kevlar prints really nicely at 260 C on a table at 90 C. I have reprinted the new design for my drum spinner in it but only time will tell how resilient it is. I have reduced the belt drive pulley which has halved the drum speed and improved the balance a bit but there is still vibratio...
by peterwaller
Thu Nov 15, 2018 7:16 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

Doing a bit of a rework on my drum spinner. I have modified the casing for my new 5 A controller to take the Afro 20 A brushless board. https://ngvr0q.db.files.1drv.com/y4mjqTUGmpn42OwGffm176IYdTNNj8LbOvYA7OUKWA_onYr54jSNZjmePb7XKrJy4bLuLK_phOrhryLpEthpwVDyeF5Jp2wHB0xdJRhhQ-oT0bsRl6uOkRQ4yg4bjLrGcYN...
by peterwaller
Thu Nov 15, 2018 11:56 am
Forum: Antweights
Topic: T_Y's Build Log
Replies: 91
Views: 5565

Re: T_Y's Build Log

Saw blades don't tend to be as successful at this scale, if they do actually cut into the other robot they tend to jam.
Hence the number of one, two or three teeth cutters.
by peterwaller
Tue Nov 13, 2018 8:00 pm
Forum: Events
Topic: Dorset Robot Championship - 24th November 2018
Replies: 8
Views: 885

Re: Dorset Robot Championship - 24th November 2018

Will the sumo include minisumo I have just dusted my old ones off and loaded some older code (my latest was rubbish) and two of them seem to be functional. Probably a bit outdated these days but worth a try if your running them.
by peterwaller
Tue Oct 30, 2018 7:33 pm
Forum: Antweights
Topic: Peter Wallers Robot Ramblings
Replies: 721
Views: 86612

Re: Peter Wallers Robot Ramblings

The new circuit boards eventually arrived from Ragworm (29 days). These use the larger 5 amp drivers and the new board combines the receiver, motors, power switch and servo and power connectors. https://loxk1q.db.files.1drv.com/y4mYApYtDAKqkX23G2nYqkbJ-Nzo7qSGcpnM-fE7Y8L0S08FlApKx8aFYWwlRtKxA5axHxL7...
by peterwaller
Tue Oct 16, 2018 7:35 pm
Forum: Resource Websites
Topic: PCB Manufacture
Replies: 10
Views: 1489

Re: PCB Manufacture

Still not managed to get a reply from Ragworm so not very impressed with them. I have found a new full bridge motor drive IC DRV8872 from Texas Instruments. This works from 6.8 to 45 volts so OK for 2 or 3 cells and can supply a peak current of 3.6 amps. So I knocked up a layout and bit the the bull...
by peterwaller
Sat Oct 13, 2018 8:22 pm
Forum: Events
Topic: AWS56 - 13th October, Bristol
Replies: 37
Views: 2681

Re: AWS56 - 13th October, Bristol

Yes thanks to Dave Joe and the other helpers for a great event which turned out to be one of the slickest yet finishing by 4.00 pm.