timing explain for me please!!!

[neilix]

ok, also what does timing do in an electric motor, and how does one time one?

[EddieO]

Increasing time to a point will produce more power in most cases, but you will get to a point of no gain or even loss....

You need to find the medium, and then adjust it for your needs....more timing will give you more punch, but less runtime.....along with a hotter running motor. Less timing will give you more top end, more runtime, but less punch....and a cooler running motor....

Most mods, start at 12-14 degrees and work from there.....


Later EddieO

[MadScientist]

ok, also what does timing do in an electric motor, and how does one time one?


Timing is the relative position of the can magnetic field to the position of the armature magnetic field which is controled by where power is applied to the armature, ie brush position on comm. As EddieO said changing the relative position of the magnetic fields will change performance characteristics.

With patience, trial and error, and taking good notes you will find the 'sweet spot' for any given motor where it performs best. Be aware that changing the motor timing may result in gear changes for best performance.

[Van Helsing]

Kind of like advancing the timing of a 1:1 vehicle go to far then it will ping in a 1:1 car that is. And detonation is a bad thing . Same kinda relative thing like EddieO said.(in a elec motor sence)

[highroller]

Depending on each motor tuner they may set the timing at a level where they feel it produces the best balance of rpm and torque. For specific uses or type of racing done this setting is not perfect sometimes it's better to ran less timing (reduces wear, increases runitme sometimes without huriting top speed). In other instances such as oval racing the timing may be set right in the area of being on the detonation side of 36degrees, for certain motors. Here acceleration (high rpms) is desired and less is put on the torque output of motor, high runtime/voltage batteries become a big issue here even with batteries in the 3700 to 3800 capacity area.
A few other factors are used to allow motor to run cooler, stronger and maintain good runtime. Whenever timing is increases the pinion gets decreased by at least one tooth, more depending on results you have to obtain. When decreasing timing, then to maintain roughly the same speed your usually increase the pinion by a tooth. Since you are effectly changing the motors power a bit through timing, then it's adviseable to change the gearing. Another area to change is the tension of brush springs, as motor develops more rpms brushes may start to bounce more the normal supplied springs may then start to be inadaquate. For a starting point use 2 red (trinity) to Purple/Red and for 24 degrees or more 2 Purple adding more tension to the positive size spring.

[winning edge designs]

neilix, most motors come from the manufacturer with a generic setting, that is usually where a prototype motor performed most efficiently, mostly between 10 and 20 degrees.

For the most experienced racer/tuners, adjusting timing can change the power curve of a motor and make it more, or less aggressive. These adjustments are usually left to experts and since it is easy to change motors, say from a 14 turn to a 12 turn when we need more power, there really is no need to risk burning up a motor.
The problem is, too much timing can distort the comm, cook the brushes in one run and even heat the magents to the point that they will never perform as needed for good results.

There are so many factors, like brush compounds, spring tension, brush shape, or cut, gearing, etc. that come into play for best results when getting the most from a motor.

Your driving will still be the single biggest factor in the results, so I would practice driving rather then messing with motors too much...............imo, Jim