New FW- doorstop

[Danjr1]

Re: New FW- doorstop

decided to completely change the design. will hopefully get it done for the champs!

[archie2000]

Re: New FW- doorstop

interesting :-?

[Danjr1]

Re: New FW- doorstop

new and hopefully improved version! just waiting for the 5mm steel wedge and proper wheels and its all done. gone for 2 motors instead of 4 so that the armour can be built stronger.

[Leonardomayo]

Re: New FW- doorstop

Have to admit, I wanted to see how 4 of those motors would work in a 2 wheel bot. :P
Looks very nice though. What are those things on the back for? Just to stop it balancing?

[Danjr1]

Re: New FW- doorstop

they are two steel spikes which add a little weight, stop it resting and allow a little offensive capability when reversing (or upside down and going forwards). With four motors, it worked fine. had no issue with the drivetrain but the armour/ structure just looked flimsy so removing two motors saved over 1.5kg which went on armour and allowed the bot to be smaller.

[PJ-27]

Re: New FW- doorstop

Looks very neat!

I do like Polycarb on robots, very satisfying being able to see inside.

[archie2000]

Re: New FW- doorstop

it looks good
I was dissapointed to are it go from 4 motors to 2 with massive gears
nice work

[Danjr1]

Re: New FW- doorstop

have a issue with the current build which I'm looking for some advice on. Basically, the bot is currently running a 5mm steel wedge with a welded bend in it and this is held in place by six 65mm and two 25mm wood screws which screw into the side panels. Im now beginning to believe that this won't generally be enough as the metal will become distorted/won't be any good against spinners. Therefore, I have two solutions:

1. a bent wedge shape (as it has now) but the wedge sections would be made from two pieces of 15mm HDPE. The side panels would be made longer and the screws would bolt into the wedge sections through the side panels, meaning I could get at least 12 screws holding it in place. It would be more expensive as i would need kenny to machine the wedge angles as they are quite extreme.

or

2. a flat 1 piece ramp wedge (angle would be 39 degrees form the horizontal), again made from 15mm HDPE. secured in the same way as above. Would be cheaper as i think i could get the angles cut on a table saw with a angled table.

The first option would be more interesting but the second would be cheaper. both would be supported underneath via some HDPE inserts.

Thanks in advance for any advice!

Dan

[Bodge Job]

Re: New FW- doorstop

Im sure 5mm steel would be fine! That's pretty thick! What thickness are the screws? The would probably hold if there thick enough!

[Danjr1]

Re: New FW- doorstop

12g so 5.5mm.

[Bodge Job]

Re: New FW- doorstop

Ould have thought that would be fine? That's sounds pretty sturdy!

[Danjr1]

Re: New FW- doorstop

ill see how it goes. I'm leaning towards the flat wedge, is cheaper and i can put something into the wedge (steel bits) to stop things going straight over

[PJ-27]

Re: New FW- doorstop

Satanix is 5mm mild steel and that stands up to pretty much everything.

A lot of it is about how it's mounted though.

[Danjr1]

Re: New FW- doorstop

finally near-enough finished!

Just awaiting the botbitz 85A escs and a little bit of angle grinding on the wedge. Upgrades in future will include a further support under the wedge and real speed 900s. Will try and use the pistol grip TX system with the new ESCs as the electronizes would go full throttle on that system when the signal was lost.

[Danjr1]

Re: New FW- doorstop

The LED strips have turned out pretty good! Performed nicely at guildford other than small niggling issues which will get sorted. ESCheap 85a ESCs have now been fitted and are much better than the old electronizes.

Next set of improvements will be new side panels which will have a shoulder for the steel wedge and polycarb armour, a HDPE wedge at the back for when its flipped and possibly real speed 900s (although the replicas are more than adequate!). May also look into getting titanium axles.