XBL^2 recone oops

[ciaonzo 5,000+ posts]

Who can spot what this guy did wrong?

Click to read more...

 

[wew lad 5,000+ posts]

Who can spot what this guy did wrong?

you mean the fact that he isnt using a split coil? or is it split just looks like one..

 

[ciaonzo 5,000+ posts]

you mean the fact that he isnt using a split coil? or is it split just looks like one..

That's a good guess but XBL^2 doesn't use split coil.

 

[wew lad 5,000+ posts]

not mounting the basket to the motor while preparing the recone?

 

[ciaonzo 5,000+ posts]

not mounting the basket to the motor while preparing the recone?

Getting colder.
You were warm with the voice coil.

 

[big scott]

he did not shim will checking were spider goes?

 

[hispls 5,000+ posts]

Bwahahahaha

When you saw 11mm "gap" on a nearly 3" top plate that should have been a hint.

Dual gap.

He really should have just measured the depth on the OEM coil.

 

[hispls 5,000+ posts]

Scratch that. Whoever did the first recones can't have had the coil properly centered either. OF course nobody who watches that is going to be doing XBL^2 woofer since there's so few of them out there, so otherwise it seems sound.

 

[ciaonzo 5,000+ posts]

Bwahahahaha
When you saw 11mm "gap" on a nearly 3" top plate that should have been a hint.

Dual gap.

He really should have just measured the depth on the OEM coil.

Nailed it.
Isn't that hilarious?

 

[Cloud77]

could you elaborate a bit on this? If he calculates the correct xmax of a brahma how would his calculations be off? all of the coil is still in the gap

 

[Papermaker85 5,000+ posts]

Xbl was explained and its pretty **** simple. It's two spaced gaps with a coil that is centered between the gaps. The spacing between the gaps the gap height and coil height are proportional to each other to make the motors flux more linear throughout its linear stroke.. Eventually it becomes nob linear as the coil leave the gap very much so like a normal overhung design.

 

[ciaonzo 5,000+ posts]

It's a dual gap motor but he only measured one gap and centered the coil on that. At rest, there should be no coil showing outside the gap on an XBL^2 motor. You want each gap to see the same amount of coil, half as tall as each gap. This means as the coil moves, say outward, any amount of coil that leaves one gap enters the other. Short coil with tandom gaps. Awesome design.

 

[mwmkravchenko]

Great example of a guy that knows just enough to be dangerous.

On this driver the gap is the total height of the steel above the magnet.

 

[Papermaker85 5,000+ posts]

some people need to leave well enough alone.. dumb-*** ruined a great motor

 

[ciaonzo 5,000+ posts]

Great example of a guy that knows just enough to be dangerous.
On this driver the gap is the total height of the steel above the magnet.

Not quite, as there are two distinct gaps within that height.