Motor rebuild kits: 1410 and 1415

[crazyjr]

Originally Posted by ta_man

Got a question on these (sort of). Since they have been out, I have had 6 different 1410 motors in my possesion. The first three (manufacturing time wise) had wires about 4-5 inches long. The last three have wires about 8-9 inches long.

Interesing observation: There is a significant difference in the magnetic detent strength between the early motors with the short wires and the later motors with the longer wires. About as much and maybe even more difference than between a Castle 1512 and a Castle 1518 (both of which I own). Another way to characterize this: The difference in magnetic detent strength between the short wire 1410s and the long wire 1410s is greater than the difference between the 1406 and the short wire 1410. At least to my fingers.

Is this difference because of a change in the magnets? And so the real question: Do the rebuild kits have the same magnets on the rotors as the later 1410s with the long wires?

I'm sure the length of the wire is incidental, and just indicates a running change in the spec for wire length but it curious that all the long wire motors I've had have apparently stronger magnets.

I realize this effect could, alternatively, be a design change in the stator, so I'm asking the question.

My Guess is that the amount of Neo mag material may have decreased, due to the increase in price.

I noticed in the latest RC Car Action that you are now going to offer the 1410 with the MM Pro in a racer SC package w/5mm rotor, Can that package be got with a 1/8 rotor? I have an ST (T4) that i would love to use that in, But finding 5mm 48 pitch pinions will be a Bugger and a rebuild kit just to convert would be a watse

[ta_man]

Originally Posted by crazyjr

My Guess is that the amount of Neo mag material may have decreased, due to the increase in price.

I noticed in the latest RC Car Action that you are now going to offer the 1410 with the MM Pro in a racer SC package w/5mm rotor, Can that package be got with a 1/8 rotor? I have an ST (T4) that i would love to use that in, But finding 5mm 48 pitch pinions will be a Bugger and a rebuild kit just to convert would be a watse

I'd swap you a new unused 1410 I have with a 1/8" shaft for that new unused 1410 with a 5MM shaft - it would save both of us buying rebuild kits (sorry, Patrick) or having to take the motors apart.

[ta_man]

Originally Posted by crazyjr

My Guess is that the amount of Neo mag material may have decreased, due to the increase in price.

The motors I am talking about were all manufactured and purchased before the price change.

[crazyjr]

Originally Posted by ta_man

The motors I am talking about were all manufactured and purchased before the price change.

ok, figured it was a possibility. Could be the mass of the longer wires is holding the magnetism better, I know the wires are not touching, But can the wire length effect the feel of the magnets?

[ta_man]

Originally Posted by crazyjr

ok, figured it was a possibility. Could be the mass of the longer wires is holding the magnetism better, I know the wires are not touching, But can the wire length effect the feel of the magnets?

No.

[Pdelcast]

Originally Posted by ta_man

No.

^^ what he said

[Pdelcast]

Originally Posted by ta_man

Got a question on these (sort of). Since they have been out, I have had 6 different 1410 motors in my possesion. The first three (manufacturing time wise) had wires about 4-5 inches long. The last three have wires about 8-9 inches long.

Interesing observation: There is a significant difference in the magnetic detent strength between the early motors with the short wires and the later motors with the longer wires. About as much and maybe even more difference than between a Castle 1512 and a Castle 1518 (both of which I own). Another way to characterize this: The difference in magnetic detent strength between the short wire 1410s and the long wire 1410s is greater than the difference between the 1406 and the short wire 1410. At least to my fingers.

Is this difference because of a change in the magnets? And so the real question: Do the rebuild kits have the same magnets on the rotors as the later 1410s with the long wires?

I'm sure the length of the wire is incidental, and just indicates a running change in the spec for wire length but it curious that all the long wire motors I've had have apparently stronger magnets.

I realize this effect could, alternatively, be a design change in the stator, so I'm asking the question.

There has been two small changes in the magnet design on the 14xx series since we started building them.

Neither of them has anything to do with the cost of magnets (unfortunately.)

One was to make the rotors more consistent from production run to production run (magnet alignment)

The other was to improve back-emf matching.

So yes, you might feel some difference between earlier and later build-date motors.

Thanx!

Patrick

[ta_man]

Originally Posted by Pdelcast

There has been two small changes in the magnet design on the 14xx series since we started building them.

Neither of them has anything to do with the cost of magnets (unfortunately.)

One was to make the rotors more consistent from production run to production run (magnet alignment)

The other was to improve back-emf matching.

So yes, you might feel some difference between earlier and later build-date motors.

Thanx!

Patrick

Thank you. But now:

1) What does "improved back-emf matching" do for us in terms of motor control, driveability, or performance?

2) Would it be correct to assume that since the rebuild kits came out after the first of the newer dresign motors with the stronger detent feel, that the rebuild kit rotors would be the same as the newer design rotors in the motors?