Looks a bit like a feather weight shunt if you squint :)
Printable View
Looks a bit like a feather weight shunt if you squint :)
Aha it does a little actually, can't wait to get it back
Looks great! Just sort those axe supports out, no more towers sam :P
The current one will be staying like that and will be used for Whiteboards and Non spinner events, but i promise when i build Hatchet 2 it will be completely tower free
Tower? As in the 2 support bulkheads for the weapon shaft? You kind of need those.
Of course you need them, but make them less like just 2 cut ends of HDPE, maybe ass some curves or angles in there so it's less boxish
Matt never liked just the two straight up axe supports, Hatchet 2 will have bulkheads sloping towards the back of the machine
Could be my love for the 80's but I like square shapes.
Makes the machine look more aggressive in my opinion.
I actually don't mind how they look either but tbh they never felt all that stable and they were a bit of a rush job, really when i build the new one it needs proper bulkheads that go the entire length of the machine for the extra bit of structure.
So i had a nice little surprise today when something turned up that i wasn't expecting
http://i921.photobucket.com/albums/a...ps004d430d.jpgIt's a Johnson 850 motor and gearbox that i brought from Mario months ago that i assumed had been lost in the post, i have no idea where exactly it's been but now it's here i really feel like i should put it to use somehow. Not quite sure what i'll do with it just yet so i'm open to suggestions but for now here's a quick vid of it running on a 3s lipo, ignore my one handed stumbling to get the thing connected. http://s921.photobucket.com/user/mrs...3b5ef.mp4.html
How does an 850 compare to an S900 power wise?
That motor wouldn't hold a candle to a speed 900 , still pretty powerful though
Oh yeah, I meant to mention, I reckon Onyx's wheel has gone the same way as it's never arrived. I did receive a friend's wedding invitation about three months after it was posted so I suspect it's circling round the postal system somewhere. Not your fault btw and hasn't cause a problem at my end; it'll probably turn up eventually :)
Oh. Numbers wise it didn't seem that far out.
@Jamie, sorry about that mate i hope it turns up soon, i'm happy to reimburse though if it doesn't.
@David, The 850 motor i have there is quite a bit smaller than a genuine speed 900 and as such is much less powerful, even the 900 copies on Ebay are quite a bit bigger than my motor.
Right just to keep people posted and so i have a record to keep track of i'm going to post up a few details of all my robot projects that will be happening over the rest of the year.
So here it goes..
Hatchet - Buying the old girl back some time soon and making a few more modifications, namely a new scooter motor, upgrade from a 4 to 5s Lipo and possibly a reduction change on the axe. Going to be using it as my running feather for events until i get around to building Hatchet 2 at which point Hatchet will become a Whiteboard machine.
Hatchet 2 - Putting a lot of thought and design time into this to make sure it's as good as can be, will be built towards the end of the year/beginning of next year. Changing just about everything to make it stronger, more reliable and crucially more powerful, I won't give away too much as the specs have changed from when i last posted about it but i assure you all it will be a MUCH better machine.
Lynx - My beetle i'll be bringing to Brize Norton, basically a Hazard style overhead spinner with a stupidly big blade powered by an even more stupid Brushless at a stupidly over the top 4s. Will be starting this early next month so keep your eyes peeled for updates!.
Buzz - Antweight bar spinner, basically a teeny tiny buzzbar with a 2mm stainless steel blade. Hopefully i can get it together for AWS but building it and the beetle side by side might be a bit ambitious in the time frame. If not there are always more Ant events and if it comes down to it i would choose to focus on the Beetle.
Wraith - Something a bit different this one, after finding the motor/gearbox combo i posted a couple of days ago on my doorstep i decided i really wanted to use it in something. Well after thinking about it i've come up with Wraith, basically i'm going for a Featherweight version of IG-88 from Robot wars. The robot itself will be pretty old school, i'll be using drill motors, servo switch esc's for the drive and a relay for the weapon, the chassis will be a mix of Hdpe, Nylon and Aluminium and the bar will be a whacking great lump of stainless ( 250mm long, roughly 25mm thick!). For testing purposes it will be run on 5s but for full combat fights i'll run it at 6s and see how that works, won't be all that damaging or high tech but i quite like the idea of making a simple, cheap spinner just to show that it can be done.
I look forward to seeing what you do with the new hatchet and seeing how the beetle performs, from what you said on earlier posts it should be pretty nasty :P
Cheers Andy, Hatchet 2 *should* be a massive improvement ( not hard ) over the first, what i will say is that the axe will be roughly the same size/weight but will be run on a 350w motor (up from 300) a bigger reduction and at 6s.
Just a quick question, i'll be using a relay to control the weapon of Wraith (IG 88 style spinner) i'm a little bit stuck on how to wire it though. I've got one of those Turnigy on/off switch things and an 80a automotive relay, any help would be fantastic.
I haven't used that switch myself, but there is a wiring diagram here: http://www.hobbyking.com/hobbyking/s...X370526X29.jpg. Hope that helps...
Cheers Nick although it's more about how to wire the switch to the relay and the relay to the motor and so on
Also found a huge steel disc that looks like it could be good for an interchangeable weapon, 6mm steel, 230mm diameter and around 2kg. Wouldn't cause any huge damage and i wouldn't bother using it against other spinners but still could be fun. Couldn't resist stacking a load of bits onto the old base from Hatchet, the whole thing would need to be a lot bigger but it still looks good all together.
http://i921.photobucket.com/albums/a...ps6f4069e5.jpg
One wiring diagram coming up...
Facking sick mate, I love it. Shoot us a message, I might have some spinner stuff you could be interested in.
Awesome thanks Nick
Harry i'll drop you a pm
OK, this should explain most of the wiring:
http://www.nswrfc.org/Nick/Relay_wiring.jpg
The relay should have symbols similar to what I drew on it; the important thing is to not use the NC (normally closed) side of the relay. Your relay might be different to the most common one I drew, so let me know if anything isn't 100% clear.
I would not use a relay to fire the weapon. I would go with an ESC. I was using 50V, 80A Solid state relays in Conker 1 & 2. I lost one every fight to it either burning out or getting suck on. Buy a 3rd TZ85A and use that on the motor. That's my advice.
I think you'd be fine with a relay tbh. If you're running a lower voltage, say 6s max. Relays handle other brushed spinners like old Inertia XL's and Scissorhands (although that has now gone over to a couple of botbitz I think)
The plan is to run it at 6s max so ill try the relays and see what happens, if they prove more hassle than their worth then I'll upgrade to something else. Tbh the only reason I'm using the relay is because I had a couple lying around.
Wow, that looks awesome samQuote:
Originally Posted by mrsam
Cheers John, it certainly won't be the most impressive spinner ever built as it's being done in a very basic and low cost way. It won't cause huge damage but the idea is to have a really thick (25mm) single stainless steel tooth which will be counterbalanced, my hope is that with the rpm at between 3000-4000 it should get consistently good engagement. So really it's more a kinetic flipper than damaging spinner.
Actually, Scissorhands never used normal relays, it used a pair of 100A solid state relays. They were never terribly reliable and had to be heavily modified to resist shock damage. Scissorhands is currently using a TZ85a with custom code; its still having problems but they are likely to be my fault.Quote:
Originally Posted by harry hills
If you already have the relay and Turnigy r/c switch, use them and leave space for something bigger if the relay causes problems.
I'll use them for now but take your advice and save room for something else. TBH this is only the first incarnation anyway, it will get upgraded over time but the main idea was to keep the first build as simple and cheap as possible.
After looking around for a while and not having much luck in finding suitable replacements/spares for the 900 drive system i'll be putting into Hatchet 2 i have found a couple that look promising. I'll be ordering one of each of these motors and putting them through their paces, if i find that one or both work then i have a cheap source of spares, if they don't work it's not a huge loss at £16 for the two with postage and i'm sure i could find a use for them. These are the motors in question http://www.pollin.de/shop/dt/OTg0OTg...C987LG_BF.html http://www.pollin.de/shop/dt/MDc0OTg...ON_QC987G.html Both say they are rated for 12v but i'm sure i could overvolt them, i don't believe for a second that the first motor only puts out 56w though.
rpm is well to high
look for caldercraft on ebay I have two I was going to use on the axe but were not powerful enough but will proably make a great drive system
I did see the Caldercraft ones but i hadn't heard great things and at £60 a pair i didn't want to spend that and have them be rubbish, maybe i'll buy one and see how it goes though.
I actually had a second look, the first motor i put up is rated for 2060rpm at 12v, might still be worth trying one of those out?
I'm not sure you can trust that to be accurate. It was the info on the selling page on pollin being misleading (they called the RPM at maximum power the no-load speed, which was actually 100% higher) that screwed me up with the motors for Rango. The datasheets on the selling pages often show the true figures direct from Johnson, but in the case of the lower revving motor, there is no datasheet available. No useful google results either. It might well be very low power; low RPM brushed motors are often mild, the popular s900 model was an exception.
That said, regardless of power output, that output shaft is weird as hell. I don't know if it can be removed/cut down, but even if it can be the shaft beneath is probably awkward.
The other model, at 17k no load, will need two stages of reduction. And having "racing" in the name suggests it's timed to be more powerful in one direction which would be a pain.
Sadly very little comes close to the s900. :(
I know its not what you will want to hear but building a machine around a part that is no longer in production is a bad idea. Spares will be impossible eventually and it will put the whole machine out of action. Look at brushless drive motors that have the same mounts or go for something totally different, Speed 900's are gone.