ASCC – Slot.it slot car setup : Part #2 – Motor Break-in

ASCC – Slot.it slot car setup : Part #2 – Motor Break-in


alright guys, the next thing you want to do with our Slot.it car, is to break-in the motor I’m gonna try to explain to you guys …
this is the motor that came out of the McLaren but I’m gonna try to explain you guys why we want to break in the motor let me do a little … centering, here zoom … in right there so, this right here is your armature you got the shaft, the commutator the stack and the windings and these are your brushes the brushes, when they come from factory; if
you don’t use your … your motor they’re going to be squared, ok? right here is going to be squared.
at this point, these are old brushes uh… actually I can take one of these out, and try to uh … there you go I don’t know if you can … can see this but these one’s have already taken the shape of the commutator and that is basically what you want to do when breaking in a motor the brushes come square uh… ahh … common … the brushes come squared, they sit like this around the commutator by breaking in the motor, you going to be spinning this motor at a little voltage, for you know, a reasonable amount of time which will end-up eating some of that brush material and uh… making a brush conform to the shape of
the commutator that’s all you’re doing when you are breaking in a motor let’s get to it one thing I want to point out here is
that, when you looking the motor like this this is your positive this is your negative there are plenty of ways of breaking breaking a motor right there … I ‘m gonna tell you guys how I do mine.
some people do it in water distilled water what I have here is 50% water and 50% of alcohol 91% so, half and half which would probably give this 45.5 % alcohol the alcohol is just so it uh… it dries faster later uh… basically my procedures is to run this
motor at around four volts for half an hour to one hour after that time I’m gonna put it in the water for another two, three minutes just so that the brush material that fell inside the can,
comes off cleans up the motor anyway, I’m not going to be discussing any other ways to do this, I’m just going to do it my way you guys are welcome to do the same one thing that I like to do, before I break in any motor although this motor is not exactly new, but I haven’t used it very much uh… is to check the rpm before break in, at 12 volts so this is what we are going to do I have my power supply here, setup at 12 volts I’m going to turn the power supply off
first, connect my leads this wheel right here is something that I made
out of uh… spur for a helicopter got it at Hobby Town and its tachometer, right here I think, cost ten dollars shipped very cheap all right, so turn the power supply actually, hold up a second
I want to lube the bushing, right here beause I’m going to test, after breaking I’m gonna lube it as well when you are lubricating the motor, never lubricate the endbell side; always on the can side if you lubricate on the endbell side that oil may rush into the brushes and you are going to end up having to open the motor to clean the, uh… the little slit between the tabs on the commutator if you put oil the oil and the brush material will fill you this thing (channel) right here this little slit, and it is going to short (circuit) one of the poles and you are going to see a lot of trouble there anyways we got it lubed marked for positive and negative …
power supply let’s call it 21400 rpm at 12 volts alright, so what I’m going to do right now disconnect one of the leads power supply back on turn the voltage down to 4 volts I’m going to leave this guy running for I don’t know, half an hour to one hour, something like that; ok? and we will be back well my motor has been running for forty-five minutes, now I got my water and alcohol mixture, here there’s no debris on it three minutes let me turn off the power supply let me see if I can zoom in so you can see the carbon particles floating there are some in the bottom, too that’s basically what came out of the brushes alright, let’s put this mixture on the side I’m going to spin this guy for a little longer I’m going to speed up this drying process with my air compressor, here I blew some more air in the motor I think it is dry, now power supply is still at twelve volts let’s check this 12 volts actually 12.4 volts to say that I’m not cheating … there you go, squared on 12 we definitely gainned some rpm with this guy, right here 22600 … 5 (hundred) … let’s call it: twenty two thousand … six hundred, after break in okay twenty two thousand six hundred; that’s a
twelve hundred rpm gain cool, hum? alright, that’s that for the motor we’re going to be using those numbers
later if you don’t have a tachometer go find one on eBay part number is DT-2234C+ real cheap little guy works like a charm

30 Replies to “ASCC – Slot.it slot car setup : Part #2 – Motor Break-in”

  1. Wow, 45 laps after 3 hours is a huge lead, congratulations. I'm pretty sure you did most of the work driving the car but I'm happy you believe the videos helped – that was the idea; thanks for the words of encouragement.

  2. It is about 1.5 inches in diameter, the center hole is 2mm.
    That wheel is an RC helicopter flywheel that I covered with a thin plastic sheet and painted black – maybe you can find something similar in your local hobby shop.

  3. Hi, the procedure would be the same.
    If you have a closed can motor with covered vents, you could cut a small slit to allow the fluid and brush shavings to fall through.

  4. Hello what kind of power supply do you use? Does it have variable amps to? I enjoyed watching your video's keep them coming.

  5. The Power Supply brand is Leader, the model is 718-20D, I would recommend it to anyone but it has been discontinued. It has adjustable amperage from 0-20 & voltage from 0-18.

  6. Thanks for the help when you are breaking in a motor at 4 volts how many amps do you have it set at and thanks for the info.

  7. On those types of power supply, when you want to regulate voltage, the amperage is set to max. The load will only draw the necessary amperage, about 200mA at 4 volts in the example; 400 mA when submerged.

  8. Hello i have to break in my scalextric 18k motor,how many time i must leave running the motor?..Cheers keep it up!

  9. Same as shown in the video: 45 min to 1 hour @ 4 volts; 3 minutes in the water/alcohol mixture after.

  10. In Italy we're not allowed to open the motor, so no changing the brushes or cleaning the commutator.  Most of the guys at my club tape over the can holes to stop rubber dust getting in.  However, this also keeps any brush dust IN the motor.  I guess finer dust better than chunks of rubber.  An occasional clean in water seems to be answer.  Using alcohol mixed with water is something new to me.  I've also ordered one of those tachometers.  Great value.  Thanks.

  11. I run my motors in using the motor pod and back axle assembly.  This helps polish the axle in the bearings, and also runs in the gears too.  I dab a tiny bit of toothpaste on my gears for this which helps to bed them in.  Once done and cleaned I use teflon-impregnated lubricant for mountain bike chains.  It dries on the gears and they run almost silently.

  12. There are some good tips here but you should oil the endbell end just do so lightly.Also you are right about there be many ways I wanted to mention that not only does the water carry the material away it works as a abrasive to help bed the brushes in and seat them on the com..I do a similar method but you need to realize that the water works as a abrasive.

  13. What kind of alcohol should it be? Is 90% denatured ethyl alcohol (color pink) okay to do this wash? Thank you

  14. Pull the arm . Polish the commutator ! With red jewelers rouge. Easy put arm in a drill spinning one way ,then with a dremel with buffing wheel spinning opposite direction . in about 3 to 5 seconds you can see the results . The commutator is done.Awesome results wipe clean and new brushes ! Put it Back in the car no break in needed ! Be careful not to hit the wire connections. Secret from a old timer . Break records !

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