armature timing

[wittyracin]

:cool: sorry for my ignorance but i have read hundreds of the posts in here over the past week or so and i am always reading about armature timing.
as i am still new to slot cars and looking at my motors and triying to work out how you can adjust armature timing on what looks like a 1 piece part.
here are my questions
1. what is involved in changing armature timing?
2. is it somethig that some one with a pretty high mechanical knowledge but not so much with electrical could do?
3. how can i tell what timing is in my current motors.


and on a different subject i have a TF drag car with a motor thats has G20 sticker on the arm.
is this a group20 motor and if so how good are they.:confused:

thanks for answering a couple of my other post you knowledge has been invaluable so far with looking at set ups on my tech block but have had track time yet but will let you know how they went (or didnt).
eric

[wjdougherty]

Witty,

I don't really think you understand what you are asking, but here goes:

1. what is involved in changing armature timing? To the best of my knowledge there are 3 basic ways to change armature timing. 1) In the cheapest types of arms you can heat up the arm in the oven to soften up the epoxy which holds the comm in place. Once it is softened then you can gently twist the comm a little to advance the timing. After it is twisted let it cool and set in this new position. You can't easily do this to the more expensive arms because the comms are more securely attached to the shafts. 2) The most common method of changing the timing to to buy arms with higher timing than the one you started with. 3) The last method is to purchase setups (can and endbells) that are grooved around the endbell mounting screws. This groove allows you to twist the can and endbell which changes to timing of the motor.
2. is it somethig that some one with a pretty high mechanical knowledge but not so much with electrical could do? Yes
3. how can i tell what timing is in my current motors. On higher quality arms it is engraved on the stack. On lower cost arms it depends on the manufacturers specs. Otherwise to measure them yourself please see the attachment.

On your other question, yes an arm with a G20 sticker on it is a Group 20 arm and they are fine in their own class. There are arms faster and slower...