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  #1  
Old 12-21-2014, 04:55 AM
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Hi,
Where is the centerline on the top plate if i have motor with thickness a and thicknes b?
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  #2  
Old 12-21-2014, 05:04 AM
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center it on the larger measurement
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Old 12-21-2014, 09:33 AM
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Okay i will do it

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Old 12-23-2014, 09:01 PM
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No, that's not correct.

If you have a top plate that has a stepped top plate design as shown in our diagram that we sent to customers, you actually had both of the thicknesses together and then divide them in half. That measurement would be your center line.

As an example:
If a top plate had a 20 mm lower section (A) , and a 10 mm upper section (B), then the center line of that top plate would be 15 mm from the top and/or bottom.
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Old 12-23-2014, 09:27 PM
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I meant 1/2 of total top plate

I hadn't seen that diagram. I guess it's a psi specific diagram

{IMO, there's no need for the 3a & 3b goofiness}
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Old 12-24-2014, 10:49 AM
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There are many top plates that are manufactured with this stepped type of setup. If we are going to make recone kits for people who have motors with this design, we must know both measurements. There's no way to properly set the voice coil height without knowing both measurements.
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Old 12-27-2014, 01:34 PM
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isn't it the same thing as dead center?

adding 10 mm and 20 mm then divide by 2 is 15.

but if the top plate is 30 mm and you just find center, its the same thing
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Old 02-16-2015, 08:33 PM
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Yes the coil is still set dead center of the top plate, but that doesn't account for where the frame will be set up. On a normal top plate without the extra step, the frame sits in line with the very top edge of the top plate. on a motor with a stepped top plate, the frame can be mounted anywhere between the top of the top plate and the bottom of the top plate, just depending on the thickness of each section.

Check out this XXX motor...



The top plate has more of a stepped portion than it does a flat portion. The center line of the voice coil would actually be above the plane where the frame is mounted. That's completely different from the way that the old XXX is set up. If you look at this other photo, you'll see that the frame would mount exactly even with the top of the top plate.



In either motor, the coil needs to be set up centered in the gap, but if we were going to make a recone kit for new XXX motor, we would need to know both measurements of the top plate sso that we would know where the frame mounting point is in relation to the top of the gap.
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  #9  
Old 02-17-2015, 12:33 AM
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for me it was the solo x 18 "motor.
because the upper part is only 3mm thick, since it was not so bad.
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Old 03-21-2015, 05:42 AM
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Interesante. Good info dave
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