Motor Timing???

[BI_SRT-4]

I have a Team Trinity P-94 14x3 motor, From years back.
It has markings on the top of the motor where the brushes are and it has,
-40 -20 0 20 40
I'm guessing that for timing but where should i have them set to?

 

[cptvkirk]

no reply?

It has been a long time since I've played with motor windings but what you are describing sounds vaguely familiar. One would think an electric motor is not timeable since it rotates on itself. As in brushed contact armature same regardless of position of it. What i believe the timing marks for, Is some motors the windings can rotate about the stator changing how much field is picked up. To set it, I can think of two ways and both require power. One is to use a multimeter to check the currnent passing through the motor on a fixed input setting. If I recall correctly, the lower the current reading, the higher affect on the motor windings, (the more drag, the more work being done so to speak). The other way requires the ability to make adjustments while the motor is turning under a fixed load. If you have the setup, the easiest way is to load the motor in someway and make small adjustments that gives you top speed. Keep in mind, what I describe here may not be the same things you have as markings, and my memory may be flawed more than I know. If any of this applies for your situation then I hope this at least gives you some tools to figure it out. If not, perhaps you can find specific info online for that model motor.

 

[Lessen]

These are the marks he is referring to. I found this thread in hopes of some better undrestanding about what the timing adjustment does to the performance of the motor and how in combination with different gearing can help the car's overall performance. Now this is a mini motor but the idea is the same as a 1/10 scale motor. You can see the tick marks here go as far as 35*. Now I'm assuming a slight turn one way advances the timing and a turn the opposite direction retards the timing. What that means and which direction is which are a couple questions we are trying to better understand.

 

[abadk9420]

I found this on the net hope it helps to answer your question.

What is timing?
A motor's timing is the position o its brushes relative to its magnets. When brushes are perfectly centered over the magnets, the motor has zero timing. When you rotate the endbell (and the brushes) in the direction in the direction opposite the motor's rotation, the timing is "advanced". When the endbell is rotated beyond the zero-degree mark in the same direction as the motor's rotation, the timing is "retarded".

How is timing measured?
It is meaured by the degrees the brushes have been rotated away from the center position. Most motors come with a lablel that indicates the degrees and calibration marks to show where the timing is set. Eventhough timing refers to the position of the brushes in relation to the magnets, all motors have either a moldeded-in pointer or an endbell screw that measures timing at a "zero point". This is usually aligned exactly between the two mounting screws on the bottom of the motor can.

Can timing be advanced or retarded to far and what are the effects?
Yes, when the timing is advanced to far the amp draw and motor rpm increase, but overall efficiency and torque begins to suffer. When timing is retarded at all, the motor will run slower and hotter (which is why it's never really used!); zero timing is the lowest point at which a motor timing should be set. A good rule of thumb is that motors with 15 of fewer turns are best set with 0 to 15 degrees of advanced timing, and winds of 15 and above work with as high as 20 degrees of advance timing. If you are unsure how much timing to run, set it on the cautious side and run with less timing; your motor will run cooler, and your car will also run longer!

 

[Lessen]

Good info. Thanks!

 

[abadk9420]

If you read the sticky I posted it will tell you pretty much any thing you want to know about brushed motors

 

[Lessen]

My bad. I missed that.

 

[Scrogg]

Man I should have read that sticky last week! It's easy to forget about stickies, no matter what you do they just seem to blend in with the other stuff I ignore.

 

[x_doug_x]

wheres the sticky?

found sticky