looks really cool, going to be deady, goodluck!
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looks really cool, going to be deady, goodluck!
That setup is pretty similar to killers, you'll love it!
https://www.youtube.com/watch?v=JMl05TaLtEE
Those little NTM motors are torquey and efficient. Even a dodgy 10c 500mah lipo at 3s seemed overkill :P Not sure what you plan to use for weapon supports but 1.2mm sawblades chopped up work great. The steel is really tough and light at those thicknesses :)
Sawblade armour. That's so hardcore.
I tried that on an earlier version of chop suey. My metal skills are extremely undeveloped so it ended up completely askew but the metal itself is great, both bouncy and tough to get through.
Awesome, moar Beetles!! Didn't realise they were going to be at Stevenage, that's near my Stomping ground so I'll make sure I'm there.
I may or may not have found out how much the 9" sawblades from a local store are... :)
The design I have had a load of weight left, so I think I can get 2.5mm steel supports in weight although they're pretty cut about to be light enough. I'd use 2-3mm ti in a flash, I just don't have any. Need to do a complete CAD and weigh in before starting.
--
I've fully converted Gonzales to threaded inserts and barrelnuts. No more m4 tapped HDPE, yay. I did this for ease of maintenance more than strength; m4 straight into HDPE is probably stronger with a long enough bolt. I had to make 18 inserts and 8 barrelnuts and work around my own build tolerances from 11 months ago. Slow process!
Pic spam (although when bolted up the only visible difference is the change of bolts...)
Most of the inserts are m8 external and m4 internal:
http://i1088.photobucket.com/albums/...9072014805.jpg
http://i1088.photobucket.com/albums/...1072014818.jpg
I experimented with m6 external for the top and bottom panels to try and save a few grams. These aren't very strong but they shouldn't need to be (typical 9t drill pinion for scale): http://i1088.photobucket.com/albums/...1072014814.jpg
The chassis as of this evening:
http://i1088.photobucket.com/albums/...s/DSC_0255.jpg
http://i1088.photobucket.com/albums/...s/DSC_0257.jpg
What's in those pics weighs 403g. I don't know what it weighed before, probably 20-30g less. I'm hoping with the other changes I still have enough left to stiffen the wedge.
Looking great. Will need to get a move on with my beetle too
What's the baseplate btw? Looks like ali
Baseplate is just 2mm hdpe. Pretty bendy but does the job. Cheers.
Spent the day in CADland instead of the workshop today.
http://i1088.photobucket.com/albums/...orezontal1.png
http://i1088.photobucket.com/albums/...orezontal2.png
http://i1088.photobucket.com/albums/...orezontal3.png
It weighs 1320g as pictured, so lacking ESCs, rx and general wiring.
edit: no it doesn't! I'm new to Solidworks and I wrongly assumed it'd assign a realistic material density to bolts taken from its own library. After correcting I have roughly 90g left for ESCs and wiring. Should still be quite doable, but tighter than anticipated.
This is a bit scary looking
Wow, just wow.
I can't wait to see this in action. Wow.
Been making progress with Gonzales. I've reworked the drive system a little. Before the wheel shaft was just a bolt locked off on the outer bulkheads and a big horizontal hit would have shunted it into the drive motor. That, and the motor pinion/wheel alignment was off by .4mm on one side which meant that motor had to be mounted crooked to engage the wheel. I couldn't leave this and call what I'm doing an "overhaul". :P
I made some little plates to fix the issues:
http://i1088.photobucket.com/albums/...2082014825.jpg
http://i1088.photobucket.com/albums/...s/DSC_0269.jpg
The wheel shaft now bolts to the inner bulkhead with an m4 bolt (the stub of thread you can see).
The spacing should now be correct, but since taking those pics I drilled out the hole so that the wheel shaft at motor-end can be adjusted by .5mm in any direction (m4 bolt, 5mm hole). So I should be able to get the gears meshing perfectly.
I made a pair of drive shafts to complete this area of changes/upgrades:
http://i1088.photobucket.com/albums/...s/DSC_0274.jpg
http://i1088.photobucket.com/albums/...s/DSC_0282.jpg
http://i1088.photobucket.com/albums/...s/DSC_0278.jpg
As pictured + electronics it weighs 1180g, I'm hoping I can make new lighter wheels (currently 100g each!) leaving 100-150g for putting steel on the scoop.
Still need to start on the spinner... and rebuild the front of T2... and make sure Rango isn't a fire hazard... 30 days gah.
Cheers. :)
Looks pretty good so far. Very neat, and compact. So yeah, pretty good all round. Sorry I don't have much to say, I'm not great at things when I'm tired.
Looking swanky Ellis! Should be interesting to see how Anvil and Gonzales meet in battle.
Hmm, not sure those drive motors you've got will be powerful enough for a beetle :/
In all seriousness though, looks very cool, should be one to watch! Still keeping the same voltage and gear ratio as last time?
Yep, if I haven't buggered it up by making changes it should drive/behave like it did before. Hopefully for a bit longer this time...
That'll be good then -looked lightning fast when I saw it, should do even better if there's a pit in the arena too, I'd imagine!
Have had to focus on some other stuff for a few days, but I have been making steady progress on the new robot. Major picspam inbound.
I started with the main chassis components - Harry squared the alu on the mill and brought the bare blocks over when he visited, the first thing I did was drill and tap according to my CAD:
http://i1088.photobucket.com/albums/...s/DSC_0361.jpg
I devised a mounting method for the wheels which involved making a hub. Making this sucked a bit; too small and easily ruined (I have so far avoided making the second one...):
http://i1088.photobucket.com/albums/...s/DSC_0350.jpg
I then sort of forgot to take more individual part pics, or what I did take was in terrible light on an old phone, so cutting to the chase it looks like this as of this evening:
http://i1088.photobucket.com/albums/...s/DSC_0071.jpg
http://i1088.photobucket.com/albums/...s/DSC_0070.jpg
http://i1088.photobucket.com/albums/...s/DSC_0076.jpg
http://i1088.photobucket.com/albums/...s/DSC_0075.jpg
Next to the not-touched-since-last-post Gonzales for a sense of scale:
http://i1088.photobucket.com/albums/...s/DSC_0077.jpg
So: the motors are mounted, the backplate is done (1.4mm ti), the alu blocks are as holey as they'll get, the HDPE bits need some inserts for top/bottom panels, and one wheel guard thingy is done. I was very skeptical of just 2mm HDPE even being worthwhile, but because it's all under tension (I didn't heat the bends, so they're trying to straighten) and a trapezoid it's pretty stiff. Making that was certainly a learning experience. Second one should take a third of the time.
Will be getting to the weapony stuff before long.
That looks so slick! How did you get everything looking so neat?
It's not that neat when you get close! Although I do file/sand pretty much everything.Quote:
Originally Posted by Eventorizon
I have made the main support structure pieces for the spinner. I started with the more simple one:
http://i1088.photobucket.com/albums/...s/DSC_0092.jpg
http://i1088.photobucket.com/albums/...s/DSC_0098.jpg
And just finished the second one:
http://i1088.photobucket.com/albums/...s/DSC_0106.jpg
http://i1088.photobucket.com/albums/...s/DSC_0121.jpg
http://i1088.photobucket.com/albums/...s/DSC_0126.jpg
Not sure what to do next, either the other-end-shaft-support (which bolts to the more simple piece above) for the brushless or the other wheel cover thing.
Damn son. Somebody give this bum a job so he doesn't have time to make stuff this nice and make me look bad.
Somebody give me a job so I can buy the tools necessary to make stuff this good.
The thing is he did this with about 10 euro worth of tooling. Cheapy hacksaw and cheapy files/needle files. Impressive.
I just hope I can match it with a *insert high number here* mill! And harry is right. A cheap file and some sandpaper and a good vice is all it took. And time... lots of time...Quote:
Originally Posted by Fathersplat
Lol thanks guys. Hacksaw to begin with, lots and lots of filing, a touch or two on the bench grinder to accelerate removing some bulk and some holes courtesy of the pillar drill. I don't have a good/big vice, wish I did lol. Each one took maybe 7-8 hours from marking out to taking pics.
What are the spec's on the machine? Weapon motor, ESC's, Batteries?
2826 1200kv NTM, picked for it's tininess.
Generic pick-any-of-these 30a BlueSeries thing from Hobbyking. Drives are 10a botbitz.
Turnigy (not nano-tech) 800mah 35c 3s pack, which should give me *just* enough run time with the small motor.
The weapon reduction is roughly 1.44:1, giving a theoretical top speed of 10,000rpm. I'll be chuffed with 8,000 real-world.
It might be a good thing you're in Spain most of the time :D
Will it fight in Germany?
That is well built. No real catch-points besides the bolts. Should be enough weight over the rear to make it drive properly. And if that motor does what its supposed to do it will be a dangerous little machine... makes me feel like I am once again overkilling the weapon on my new beetle but what they heck, it will be fun.
Spent the past few days poking Rango so progress on this has a slowed a little. Some new bits though:
Other-end-shaft-support for the brushless. Little bronze bushing (flange is .8mm thick...) and an equally fiddly ti plate.
http://i1088.photobucket.com/albums/...0082014923.jpg
http://i1088.photobucket.com/albums/...s/DSC_0114.jpg
Made the pulley that goes around the motor this afternoon and took delivery of the belting.
http://i1088.photobucket.com/albums/...s/DSC_0133.jpg
http://i1088.photobucket.com/albums/...s/DSC_0136.jpg
http://i1088.photobucket.com/albums/.../DSC_01262.jpg
Disc pulley/bearing supports next, then I'm not far from a weapon test.
Looking extremely awesome - very well made!
It dun gon and spind up!
https://www.youtube.com/watch?v=elotw3yTG1g
That works real nicely man. It will be interesting to see how much of a kick it gives when spinning up not clamped down.
How long before we get to see a smashy smashy test?
I'm not sure if I'll have time to do one. Also, the old problem of if I break it in testing I've broken it, so if I don't test it it might do one more fight before breaking at the event, which is better. :P
True true... what event is it going to be at so i can avoid it completely?...
Hah, Stevenage.
Damn... I think Anvil is in trouble. I wish I could get my Spinner done in time, and that Susan was going to be finished some time soon.