Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
That would certainly be tempting! Having started out on drill motors, I never want to go back to them. The long-term savings of a more relaible part are hard to determine but real.
Mon Jun 06, 2011 4:27 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
If you don't use a part right it'll never work, regardless of expense or build. Think about that, and demons 4 year old same motor/gearbox drills _________________ www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz
Mon Jun 06, 2011 4:31 pm
bytraper
Joined: 31 Oct 2005
Posts: 195
Ah yes, but Demon is a rare beast and has small wheels which wouldn't even stress an all plastic gearbox. It doesn't rely on pushing power at all. It relies on a hulkin' great disk and mostly one wheel on the ground at any one time.
Its also my favourite bot in Australia. Also isn't demon using a couple of 18v dewalt drill motors?
Just thinking about it, i could probably grab some different ratios too and have grooves for circlips cut into the shaft 1mm wide every 3mm
Mon Jun 06, 2011 4:47 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
You're thinking of Cobra, has Dewalts, Demon is definately drills _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Mon Jun 06, 2011 9:01 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Aren't the drill gearboxes in Demon modified? They have lasted brilliantly, but doing the various mods we have developed takes skills and tools that new builders don't have. Perhaps we should list out all the options for Steve to reference?
Anyway back on robot progress. Have modded tpy1-25s and will try them out sometime. I have some gearboxes which aren't quite standard drills but will do for some initial testing. Hoping that it will work fine with no magic smoke.
I just bought the equivalent one in a non B-grade cell so will see how it goes. Only things I need now are some drills.
Oh and red wheels are $4.87 IMO a lot for a crappy plastic wheel but as mounting them is like 30cents worth of washers can't really get anything cheaper. _________________ Steven Martin
Twisted Constructions
http://www.botbitz.com
Wed Jun 15, 2011 12:42 am
kkeerroo Experienced Roboteer
Joined: 17 Jun 2004
Posts: 1459
Location: Brisbane
2 x K-Mart Drills $50
1 x PCB $5
4 x Relays $10
5m of 6 Core wire to trigger relays - $5
4 x buttons $4
2 x red wheels $10
Washers + screws - $6
Ply for frame $10
Total $100
Doable..... _________________ Steven Martin
Twisted Constructions
http://www.botbitz.com
Thu Nov 06, 2014 8:31 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
did that include servos, grub screws for modding the drills, and hose clamps for mounting them? or are we talking cable ties here? _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Joined: 22 Feb 2013
Posts: 96
Location: Dekalb, IL
I'm wondering if you could use a attiny or equivalent to control the relays instead of using a cable system. would not add much cost. also the new wifi chip ESP8266 might work for a receiver using a smart phone as the controller. someone who knows what they are doing might be able to make a system that works for $15-20.
Fri Nov 07, 2014 3:06 am
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
If your looking at a tethered version, you could use DPDT toggle switches instead of relays. _________________ https://www.halfdonethings.com/
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