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Upgraded with a new 6.54kg disc/bar and fixed several reliability probs as well and added 1 magnet next to each wheel so it can spin up fast without the inside spinning(hopefully). Total weight 13.615 at the moment so 15g to loose somewhere. Also fitted a new speed controller for the scorpion (Kontronik jive 120+HV).
Pics below.
Very nice :)
When you changed to the bar I thought that it just spun itself; only realised now that it's attached to the shell and the whole lot still spins.
You and me first fight with Tron :mrgreen: I'm not scared :D dose it spin clockwise?
It can spin in either direction but not during a fight, it has to be programmed before so i have to choose carefully.
Those blocks look more like blunt impacts than tearing teeth. Is that on purpose or do you have points to go on it ?
they have sharp edges but as hardox is too tough to cut its really a rotory hammer so you need very good shock protection.
very megabyte in design, looks similar to a lot of their machines, in which case it should be very impressive!
looking good guys!
How come you went for the jive esc over the castle creations?
Look forward to fighting it...teeth impact of LS4+ 360 could make a little sonic boom lol...and a lot of mess
The jive is smaller and shock resistant and with an extra heatsink which i have fitted doubles the continous current rating and it has a built in 5A BEC. Dont know how reliable it is yet but i have got the old controller as a spare which is held together by glue, tape and cable ties now as it got too hot and melted the heatshrink off which held it together and the heatsinks fell off but it still works just.
cant believe that little esc kept going... mine usually get bored after 2 fights and decide to kill them selfs lol
what drive esc are you using? Did you find you had any problems with the drive controller after fitting the magnets? Mines having some issues..
Using a scorpion xl on 4cell, no problems driving as the gear ratio is quite low and the magnets arent that big(23.2kg pull each)and are 6mm from the floor but they do help. Had to take off the connector blocks and solder the wires direct becuase when testing one snapped off after a big hit.
'The terminal block snapped after one big hit'
I know that feeling, had one snapped off from shock damage after an encounter with Little Hitter 2 years ago :)
What motor do you use for the bar?
Had a play with my new toy at the weekend and decided to make ls4 a bit more reliable.
The supports at the back of the drive motors were bolted to the base and with large impacts the base
flexed and bent the shafts so made some new ones that fixed to the gearboxes.
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You've got Speed 900's for drive now ? thats going to be a very quick LS4 :)
Also made a new mount for a wheel which use to have the weapon motor bolted to it.
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No the motors are are speed 600s
And changed the weapon geabox so the screwdriver motor is not going to fall off
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going to wire up and test at the weekend then on to LF3.
WOW :D
Gearbox looks pretty cool- what ratio you gone for?
10 to 1 gear ratio
What is the motor you are using? Looks very golden... and powerful... and expensive!
And loving the milled Aluminium btw :-)
The motor is a scorpion HK4035-560kv, 4.2kw and running on a 10cell lipo about £100 on ebay.
what rpm is the shell gonna be spinning at?
It spins about 2000 rpm and is 6.54kg and 580mm dia.
That is a meaty motor, What capacity is the 10 cell lipo? My robot runs two speed 900's at 6 cells and the capacity is 3000mAh which I suspect is much more than I need. Weight and space saving to be had in short. And two of those would be a serious upgrade!
Is the 10:1 ratio new, or the existing ratio from the previous champs? Because it's always looked like it's spinning waaaay faster than 2000rpm, especially when you rev it up high!
Although it could be down to the fact that the whole body is rotating and is quite large, so looks much faster...
But the upgrades look very nice, hope they do the job. I have to admit though, it's quite worrying reading about NST and LS4 getting upgrades to make them more reliable. They're deadly enough already :uhoh:
The battery capacity is 2600mah and have never used half of that in a fight but any less capacity
would decrease the max current draw too much.
It was 10:1 last year and most of the time ran it on half speed to keep the robot in the arena.
That was 1000rpm!?
Just goes to show how important weight, diameter and bite is.
Tried to test on friday plugged the link in and nothing happened, the scorpion speedo did work a year ago so dont know why its not working now but it hasent blown up so mark may be able to fix it but on taking it apart i found that only a few fets were touching the heatsink pad, so much for quality. If mark can get it going i will modify this and use it as a spare.
New speedo fitted, trying a castle ice2 160HV, going to test it tommorow and try the data logger on it.
Its a bit heavier than the scorpion so will have to loose some weight somehow.
I should copyright my ideas from you guys lol.....
Post a pic of the data from a spin up :)
Those new parts are looking good Graeme, espicially the weapon gearbox, looks very robust.
The Triacs are awesome little machines!
Out of curiosity, why did you choose to include a bevel gear set in the design?
Thanks sam yours is looking great too, I used the bevel gear because the motor wont fit in on its end
theres only 65mm height inside the robot.
1st spinup data below if you click on it it gets clearer. I couldnt spin it up any faster as the base would spin round on the garage floor. I dont have a steel sheet for the magnets to hold it down and i probably didnt need a 160A
controller.[attachment=0:k316amhx]Spinup data.jpg[/attachment:k316amhx]
As if your current draw Is that low.... 360s getting re geared.
That's running off 10 cell isn't it? So the current draw will be a lower than the same setup on 5 or 6 cell if i'm right in thinking?
That you are. Plus I'm assuming a spin up that slow wouldn't draw too much current.
So Dave I would recommend doing a few spin up tests and seeing what the current draw on your own machine is before changing out ratios etc
210amp :) ...I know why my current draw is high/ls4's is so low... Was just shocked at how low ls4s draw is... Even on a slow spin up.
I have screwed the base down to stop it spinning but still cant spin up any faster, the motor is going out of sync for some reason if i throttle up quickly and it screams. What settings do you use on your esc dave ?.