Joined: 27 Jun 2004
Posts: 1105
Location: SunshineCoast
Ok guys comments please. I got a new work phone and it has a camera so I started a thread.
I'm already over this design, but I will complete it. I have learned so much building it and everything I do now is a lot faster(construction).
The front end requires pipe wedges or similar. Also the chain drive will be sealed in with steel.
Any advise on mounting the wheels to the axels would be appreciated. I have my ideas but please your welcome to give me more ideas.
Thanx, Trent.
Mon Apr 10, 2006 7:54 pm
prong Experienced Roboteer
Joined: 19 Jun 2004
Posts: 839
Ok, comments that are not just admiring hehe
With a 4wd bot it is generally better to make it as wide as possible and as short as possible for better steering, your current setup is fairly long compared to how wide it is.
The scooter motors should have pletny of power anyway so turning should not be an issue, but it could be worth playing with. That said a longer and skinnyer design typically has more stability in a line, good for ramming!
In terms of attaching the wheels I would go the lazy way and weld a plate to the axle shaft and bolt through that to the wheels.
Plenty of other ways to do it, but I like simple.
Mon Apr 10, 2006 8:00 pm
andrew
Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W
im guessing your robot will have a overhead hamer weopon.
The kerrisons hammerbot last event was very impressive minus the chain falling off issue and all dat, was able to self right and when it connected they felt it thats for sure (a lil longer reach with pick/axe would make aiming easier probs)
Thw way kerrisons told me they were to fix chain derailment and something u can maybe do is to weld teh chain to the sprocket that doesnt need to rotate off the sprocket or anything. It is sorta permanent but would work perfectly _________________ Andrew Welch, Team Unconventional Robotics
Mon Apr 10, 2006 8:01 pm
Totaly_Recycled Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1346
Looking good Trent dont know what your axels are made from but you might have probs with them bending being unsuported that far from the wheel .
Mon Apr 10, 2006 8:04 pm
assassin
Joined: 27 Jun 2004
Posts: 1105
Location: SunshineCoast
Simple bot for my first one. No weight left for weapons mate(4X100watts scooters!). The bot is the Hammer , maybe.
Mon Apr 10, 2006 8:10 pm
assassin
Joined: 27 Jun 2004
Posts: 1105
Location: SunshineCoast
Its really just a test bot to teach me bot building
Wheels are floating @ the moment(10mm steel). Axels will be trimmed.
Also wheels will equal distance left to right, front to back. Hows that
Mon Apr 10, 2006 8:13 pm
Totaly_Recycled Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1346
Should make it well balanced .probaly a flange like some one else sugested welded to the axel that you can bolt the wheels to might work or a flange that you can key to the shaft would be better
Mon Apr 10, 2006 8:20 pm
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
That is sooo Blue Max! Nice work Trent! If you get sick of battling it, at least you can take it down the RC car track I can see this being one robot Marauder will hate, doesn't look like there is anyway to prop it against the wall without a wheel touching something... _________________ https://www.halfdonethings.com/
Mon Apr 10, 2006 8:22 pm
dyrodium Experienced Roboteer
Joined: 24 Aug 2004
Posts: 6476
Location: Sydney
Yeah! Very funky, be sure to take a radar gun to it to see how fast you can get it _________________ ( •_•)
Actually, where abouts did you pick up those chians and sprockets Trent? And how much? I might be interested in some C&S's soon... _________________ https://www.halfdonethings.com/
Mon Apr 10, 2006 8:34 pm
assassin
Joined: 27 Jun 2004
Posts: 1105
Location: SunshineCoast
150mm Wheels, 4X100watters, 4:1 gearing. Do the math for top speed, i don't know. I never know what rpm to put to the motors @ seeing there NOT unloaded.
I just looked at your chain set up i think you might get some problems with the chain jumping while driveing the center sprockets .i would have used short single chains to each wheel .
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