Hi
In situations like this, we typically proceed based on the following assumptions: the curvature of the phase plug and diaphragm are generally the same or very similar. The shims position the diaphragm at its intended gap between the phase plug and diaphragm. Without a reference for the number of shims, we check the height of the magnetic gap and the location of the voice coil relative to the magnetic gap, then adjust the shims to optimize driver efficiency and cooling. We assume that placing the coil at the optimal position within the magnetic gap is likely what the manufacturer intended for the correct gap between the diaphragm and phase plug. This is a generalized suggestion....
In situations like this, we typically proceed based on the following assumptions: the curvature of the phase plug and diaphragm are generally the same or very similar. The shims position the diaphragm at its intended gap between the phase plug and diaphragm. Without a reference for the number of shims, we check the height of the magnetic gap and the location of the voice coil relative to the magnetic gap, then adjust the shims to optimize driver efficiency and cooling. We assume that placing the coil at the optimal position within the magnetic gap is likely what the manufacturer intended for the correct gap between the diaphragm and phase plug. This is a generalized suggestion....
Hunter Audio,
Thanks for your response. Assuming both magnetic motors have the same or very similar phase plug height and based off the writing on the diaphragms is it a safe assumption that the shim height is based off of that number?
IE..
Diaphragm #1 + 0.15
Diaphragm #2 + 0.05
As someone who has tad4001 with renewed factory diaphragms it would be really lovely if there were images included with the measuring tools used for the alignment and shimming of a factory diaphragm in these drivers
Hi
Since TAD is high precision devise - it maybe possible
1. that they are compensating for the gluing / assembly tolerance between the pole piece and the phase plug. This tolerance may change driver to driver during the assembly process. It maybe that they are identifying this and compensating.
2. The most difficult assembling part while making a compression drivers I think is while attaching the vc to the diaphragm - and there may be a slight difference in the length in the vc former between the 1st winding of the vc and the diaphragm
the measurements maybe addressing mechanical issues like these.
Best Regards
Suranjan
Since TAD is high precision devise - it maybe possible
1. that they are compensating for the gluing / assembly tolerance between the pole piece and the phase plug. This tolerance may change driver to driver during the assembly process. It maybe that they are identifying this and compensating.
2. The most difficult assembling part while making a compression drivers I think is while attaching the vc to the diaphragm - and there may be a slight difference in the length in the vc former between the 1st winding of the vc and the diaphragm
the measurements maybe addressing mechanical issues like these.
Best Regards
Suranjan