Sorting out drill motors

[RogueTwoRobots]

Sorting out drill motors

I make mine to be 110mm, or 115mm if you include the tabs on the motor

[psychostorm]

Sorting out drill motors

Thanks Jamie. Nice quick response btw.

[RogueTwoRobots]

Sorting out drill motors

No probs - was working on my drill motors at the time I saw your post anyway

[psycho_fling]

Sorting out drill motors

got my grub screws today all fitted and seem when i turn the wheels at least they seem to work

at magna james b suggested using washers on the wheels, what size i tried some and the fitted into the hole made for the nut perfect but wont this make it worse? im using 75mm ones from ewan

on a totally different point i plan to use an aerial that comes out iof the robot but this means stripping the end of my wire aerial is this ok to do?

cheers alex

[RogueTwoRobots]

Sorting out drill motors

I got some of http://www.screwfix.com/app/sfd/cat/...id=14327>these

[psycho_fling]

Sorting out drill motors

when it says m10 i presume it means the the washers diamete, not the hole its self?

thanks alex

[RogueTwoRobots]

Sorting out drill motors

No, M10 refers to the 10mm hole in the centre of the washer - drill axles are ~10mm in diameter; these washers will fit on them and stop the wheels from going all the way up the drill shaft and rubbing on the casing/mounts

[psycho_fling]

Sorting out drill motors

oh well james said to put them on the outside i think, beacuse the nut is only melted in and may if it takes a big nock come out, and to stop this use a washer, do i have the wrong end of the stick?

alex

[RogueTwoRobots]

Sorting out drill motors

Nope sorry, Ive got the wrong end of the stick (or the wrong end of the wheel to be more exact )

The washers youre after are for going on the reverse threaded screw that screws into the drill shaft yeah?
If so, I think my washers are about 10-12mm outer diameter with the hole for the reverse screw (cant remember the diameter off-hand) but I think youll probably need ones with a bigger outer diameter (maybe about 25mm?) to spread the load more

[psycho_fling]

Sorting out drill motors

yeah thats right cheers jamie for you r help

alex

[jamesb]

Sorting out drill motors

put the m10 washers on the inside of the wheel, and the smaller washers on the outside. when we spoke at magna, i was suggesting that you use a washer on the outside of the wheel large enough that it does not pull into the wheel shaft hole. if the wheel is held on by putting a small washer on the reverse thread screw to hold the nut on, and not the wheel, you may have problems with the wheel getting knocked off centre and wobbling, or coming off completely. hold the wheel on by the wheel, using the nut melted into the wheel to transfer just the torque, not the side loads. the wheel life is longer this way

[psycho_fling]

Sorting out drill motors

ive tried running it on the floor where i was having problems, and result it works! and plus it works with the top on and failsafes well. but it isnt the fastest thing ever how can i increase the speed? i already have 14.4volts...

big thanks for everyones help

alex

[woody]

Sorting out drill motors

MORE Volts.

[aliboy]

Sorting out drill motors

Bigger Wheels ?

[jamesb]

Sorting out drill motors

Alex, what voltage drills are they?
if they are 9.6v, Id suggest 14.4v is the most you can reliably use (by reliable I mean they should last one event) I have run 9.6v drills at 21.6v, but they eat themselves very quickly.

If you are using higher voltage drills, as a rough guide, add 50% to their voltage, so run 12v drills on 18v etc. As I say, you can push harder, but it gets expensive to replace your motors every fight.

Out of interest, how have you wired your motors? Are they in series or parallel? they must be in parallel or they will only see 7.2v each. It may be a silly question, but it is more common than you think. Also, have you checked the electronize speed gain is turned up to maximum?

hope this helps.