Aurora Armature Testing and Identification
The performance that comes from your AFX chassis is affected by three things.
1. The strength of the magnets. Matched magnets is very important (both magnets with equal strength).
2. Finding the correct armature resistants (OHM's) for your driving style and/or the race track design.
3. Final drive gear
1. The strength of the magnets. Matched magnets is very important (both magnets with equal strength).
2. Finding the correct armature resistants (OHM's) for your driving style and/or the race track design.
3. Final drive gear
Test all 3 armature contact pads with meter. All should read resistance. NO reading inducates a problem with the armature. (broken wire?)
Aurora AFX Armature Identification
Early AFX
OHM Range; 6.0 - 7.5
Green Wire with Red Tips
AFX Magnatraction
OHM Range; 13.0 - 15.0
Copper Wire with Red Tips
AFX Mean Green
OHM Range; 6.0 - 6.5
Green or Copper Wire with Green Tips
Usually available as a separate item through American Line NOS
AFX Red Devil
OHM Range; 14.5 - 15.4
Red Wire with Red Tips
Specialty Cars (Drag Arm)
OHM Range; 7.0 - 7.5
Copper or Green Wire with Blue Tips
Super II Quadralam
OHM Range; 4.0 - 4.5
Copper Wire with Black Tips
This arm is probably the most sought after Aurora Factory arm.
It is VERY FAST (68,000 RPM @ 15Volts)
Quadralam Armature
The Quadralam armature has 4 thin plates (right)
A standard armature has 2 thicker plates (left)
A standard armature has 2 thicker plates (left)
Quadralam Advanced Timing
As you can see in the photo, the Quadralam armature on the left has been advanced about 5 deg.
Some Thought On Armature Timing
(Mikey Guindon) Hey guys, that timing thing you wrote about sounds like it is on the same princeable as my RC motors they have endbells that you can rotate to change the timing, which will move the brush position on the commutator. That will let you advance or retard timing, advance will give low end to get to powerband quicker for short tracks, retard will give oppisite for tracks with longer straightaways. Maybe thats kind of what they are trying to accomplish with the 5 degree thing. just an opinon.
(Zoltan) right on mikeman..right on...the afx super g has the timing thing too..i think ? scotts right about them running hot cause of the timing..but we cant figure out how its realy done inregards to the windings and comms plates on the armiture..electrically..? as there is no real camshaft ? its a little different than a v8 petrol engine where the timing i think is affected by the distributer and the cam..ithink..lol.yes scott we the underdogs of the slot car fraternity..WILL BE THE TREND SETTERS OF TOMMOROW..
(Mikey Guindon) Your right zol, I have a super G+ car with the adjustable timing, black printed circuit car.Well I did look at the older 4gear armature and the newer AW 4gear armatures, one green one red, I see a difference in the bottom comutators, the spacing is closer on the green, in a circle that would make that winding contact the brush sooner or later depending on rotation which could change timing a small amount like 5 deg., I dont see anything else different between the 2. Of corse Im no expert on motors, just a though, scott probally knows more than I know about them.
(Zoltan) That sounds about right Mikey, hittin the brush earlier could be a good theory.The winding wire gauge also makes a big diffence, to how the magnet flux is emitted in the magnetic delivery, making you motor fast or slow..dont forget them magnets too..never realy tryed the timing on the tomy super g,
(Mikey Guindon) Hey guys, that timing thing you wrote about sounds like it is on the same princeable as my RC motors they have endbells that you can rotate to change the timing, which will move the brush position on the commutator. That will let you advance or retard timing, advance will give low end to get to powerband quicker for short tracks, retard will give oppisite for tracks with longer straightaways. Maybe thats kind of what they are trying to accomplish with the 5 degree thing. just an opinon.
(Zoltan) right on mikeman..right on...the afx super g has the timing thing too..i think ? scotts right about them running hot cause of the timing..but we cant figure out how its realy done inregards to the windings and comms plates on the armiture..electrically..? as there is no real camshaft ? its a little different than a v8 petrol engine where the timing i think is affected by the distributer and the cam..ithink..lol.yes scott we the underdogs of the slot car fraternity..WILL BE THE TREND SETTERS OF TOMMOROW..
(Mikey Guindon) Your right zol, I have a super G+ car with the adjustable timing, black printed circuit car.Well I did look at the older 4gear armature and the newer AW 4gear armatures, one green one red, I see a difference in the bottom comutators, the spacing is closer on the green, in a circle that would make that winding contact the brush sooner or later depending on rotation which could change timing a small amount like 5 deg., I dont see anything else different between the 2. Of corse Im no expert on motors, just a though, scott probally knows more than I know about them.
(Zoltan) That sounds about right Mikey, hittin the brush earlier could be a good theory.The winding wire gauge also makes a big diffence, to how the magnet flux is emitted in the magnetic delivery, making you motor fast or slow..dont forget them magnets too..never realy tryed the timing on the tomy super g,