Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
Some new drive options.
This is the inside of a $39 ozito screwdriver. The insides are basically a 1/2 scale drill gearbox. metal gears and all
My intention is to take the $20 xu1 branded ones which should be 100% the same inside, remove the last stage of gearing and with the 380 size motor running on 3s with only one stage thatll yield 1300rpm
I think these would be basically bulletproof with a little work.
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
baha funny that, this is one mum bought, so im going to buy the $20 one at bunnings, harvest its guts, return it as faulty, do the same to the 2nd one and hopefully get my money back on that one thus yielding free drives XD _________________ www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz
Wed Oct 24, 2012 5:20 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
lol
be sure to glue some washers inside so they dont find it suspiciously light _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
saw this, unsure if usable for stuff but for 5 bucks a pop ill buy a handful next order and see what there like. _________________ Andrew Welch, Team Unconventional Robotics
Wed Oct 24, 2012 9:27 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
hobbyking! thats awesome
they're most probably exactly the same the price is right:
_________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Lots of people use the 1000rpm spur ones they are ok for beetles.
The issue with them is that some chinese manufacturers of the motors have decided that the don't need copper brushes. And have just started leaving the flaps which spring the brushes onto the commutator without them.
This means they have really high resistance at this point and sweet .... all power.
Pololu also have a range of similar motors _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Sun May 05, 2013 11:10 am
rjw
Joined: 04 Jul 2010
Posts: 110
Location: Miami, Fl. USA
quote:Originally posted by marto:
Lots of people use the 1000rpm spur ones they are ok for beetles.
The issue with them is that some chinese manufacturers of the motors have decided that the don't need copper brushes. And have just started leaving the flaps which spring the brushes onto the commutator without them.
This means they have really high resistance at this point and sweet .... all power.
Steve
I found a guy on ebay selling them for around $16 per pair...how do I know if the motors are any good?
Any other sources outside of kitbots?
thanks
Mon May 06, 2013 12:51 pm
dyrodium Experienced Roboteer
Joined: 24 Aug 2004
Posts: 6476
Location: Sydney
My complaint still stands, the ebay sellers are completely random, hit and miss, I got two types in the same order one with real brushes the other with the copper flaps and unusable. No known reliable sellers... _________________ ( •_•)
I can source the gearboxes easy enough from our gearmotor supplier, but cannot get a decent motor to match the specs of the eBay ones _________________ https://www.halfdonethings.com/
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