DONT LEAVE IN THE BALL BEARINGS!!!!!!!!
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Photos - http://community.webshots.com/album/154092733uokpXC
Photos- http://community.webshots.com/album/166819552PDWWqP

WHY NOT??????
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If you and your friend are being chased by a grizzly bear, don't worry about out-running the bear, just worry about out-running your friend

Hahah, because he did and the wheels slipped during a match. Untill you find grub screws you can leave them in.
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whew you had me worried there!
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If you and your friend are being chased by a grizzly bear, don't worry about out-running the bear, just worry about out-running your friend

Before I found grub screws in stock at Bunnings I used to use long, 3/16" bolts and when happy with the fit, hacksaw them off flush. You can get away with two screws, fill all the holes or I generally go with four.
I like to tighten each screw in turn until there is just a little slippage of the ring gear between the peaks, then do them all up a quarter turn. Hope this helps.


Oh yeah, this is "without" any bearings left in!

I fill all of the holes to stop dust getting into the gearbox.
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So even the rain that falls isn't actually going to fill our dams and our river systems

i didnt wannna make another topic for this question so im just posting it here: i have the 18v DSE drill motor and my dad says it will burn out the motor if it doesnt have the power transistor. is this true? if so how can i add the transistor into the connections of my robot?

skandia
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If you and your friend are being chased by a grizzly bear, don't worry about out-running the bear, just worry about out-running your friend

dont think so, all u need is bare motor/gearbox, grub screws to disable the gearbox and thats it really

some people have soldered a resistor or whatever its called across the motor connections to reduce motor interference to the radio gear but thats it really

Even if your running a half descent radio you dont even need to do that
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Andrew Welch, Team Unconventional Robotics

That would be a capacitor not resistor. Never done it and never had an issue.
The motor will run fine off the battery it came with, it's when you start trying to increase the voltage that it will overheat and you risk destroying it.
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Andrew meant capacitor, not resistor . A small ceramic cap of around .01uF soldered across the motor terminals can help reduce RF interference and increase the range of your radio control - there are pages & pages of stuff on this site and others about it. It will have the most benefit for 27 MHz radios and has not really been required for 2.4GHz SS radios. Since they cost just a few cents, you might as well include them.

On to the transistor: You don't generally need it; it is part of the speed control circuit in the drill's trigger mechanism and unless you were planning to make a variable speed servo speed controller with the drill triggers, its not going to be of any use.

Making a speed controller from the triggers sounds neat, but its harder than it looks and I can't recall anyone doing it. One thing you could try is to build a standard servo controller and leave the drill triggers wired in between the controller and the motor. You could then use the drill triggers as a rough speed limiter by keeping them depressed (say) 75%, which would only allow the motors to reach 75% of their top speed.

I don't think anyone has tried that either, but since it will cost nothing and isn't much extra work, why not?

Andrew (totally_recycled) has made some very nice speed controllers a couple of years ago by using a servo to control the trigger and reversing switch. Seems a like it requires a fair bit of fine tuning to get them to work but the price is right.
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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

Andrew also made a set with servo boards that drove fets and had relay reverse on them.
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https://www.halfdonethings.com/

And lets not forget the moulded uthrene trigger controls the planners came up with!
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ok thanks guys im happy now
now i just gotta wait a two weeks before my dad will take me out and get the rest of the parts for doorstop
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If you and your friend are being chased by a grizzly bear, don't worry about out-running the bear, just worry about out-running your friend

Hey! Iv`e been using drill trigger controllers since Andrew A. taught me years ago. The last one was in Fork in Hell!