microscope pix of newly retipped microridge stylus - do they look right

the thin end of the wedge
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Da He Hua
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microscope pix of newly retipped microridge stylus - do they look right

Post by Da He Hua » 04 Apr 2019 05:18

Here are a few pictures of the stylus taken using a USB microscope. It is a microridge and is newly retipped. Do they look right to you? In particular, the two sideview "silhouette" pictures. Why do they not look symmetric? Should I be concerned?
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billshurv
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by billshurv » 04 Apr 2019 09:09

That does not look like a Microridge. Hard to tell with those pictures what cut it is. Where did you get it from?

Da He Hua
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by Da He Hua » 04 Apr 2019 13:32

Thank you for the reply. For now, mindful of potential damages to reputation on a public forum, I prefer not to disclose the retipper’s identity before I figure out what is going on. It is one known in some circles, but not those 2-3 most well known ones. My questions are: (1) regardless of whether it is microridge, do the pictures look like something is wrong? (2) given the side view asymmetry, how should I determine the SRA (I want to make it as close as possible to 92 degree)?

Alec124c41
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by Alec124c41 » 04 Apr 2019 13:46

It looks okay.
I am not a fan of obsessive precision. I would align the cartridge, with the arm level, and set the tracking force as prescribed.
If you want to tweak further, mark the level of the back of the tonearm, then try it a bit higher and a bit lower, and see how it affects the sound. A stack of new cards has been used as a gauge for tonearm height.
The sound is, after all, more important than measurements.

Cheers,
Alec

Luicas
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by Luicas » 04 Apr 2019 14:14

Alec124c41 wrote:
04 Apr 2019 13:46
It looks okay.
I am not a fan of obsessive precision. I would align the cartridge, with the arm level, and set the tracking force as prescribed.
If you want to tweak further, mark the level of the back of the tonearm, then try it a bit higher and a bit lower, and see how it affects the sound. A stack of new cards has been used as a gauge for tonearm height.
The sound is, after all, more important than measurements.

Cheers,
Alec


+1

Though I’m no expert, at the current image resolution, it looks fine.

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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by Luicas » 04 Apr 2019 14:16

billshurv wrote:
04 Apr 2019 09:09
That does not look like a Microridge. Hard to tell with those pictures what cut it is. Where did you get it from?

Hi Bill. If you zoom into the first picture, the very tip, you can see the “ridge”.

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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by billshurv » 04 Apr 2019 14:19

I am not sure what you mean by 'side view asymmetry' for example attached is the FGS on one of my cartridges. It is not symmetric about the vertical axis.
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billshurv
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by billshurv » 04 Apr 2019 14:27

This is the best image of what a microridge should look like I cna find in a quick search
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by jdjohn » 04 Apr 2019 15:16

I think he is referring to the rear facets being larger, and going lower than, the front facets. But IMO that stylus looks great! As long as the ridge is there, I'm not sure the rest of the cut is as important, or has to adhere to a certain standard...but I could be way off base.

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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by billshurv » 04 Apr 2019 15:27

I've just taken a closer look and I think we are been thrown by excess glue. Yellow line marks the diamond edge. The rest is glorp.
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by pivot » 04 Apr 2019 16:58

Looks like a micro ridge to me.

Da He Hua
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by Da He Hua » 05 Apr 2019 16:42

billshurv wrote:
04 Apr 2019 15:27
I've just taken a closer look and I think we are been thrown by excess glue. Yellow line marks the diamond edge. The rest is glorp.
Bill, yes, I think you are right about the excess glue causing confusion, and also agree with your yellow line that marks the diamond edge. These are great revelations. I have taken another picture below, and I think the vertical edges of the shank are a little bit clearer. For a microridge like this, do I measure the SRA based on the vertical axis in the middle of the shank? If so, I feel like my SRA is not even 90% (the arm is parallel to the record surface at this point).
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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by tep392 » 05 Apr 2019 18:35

I think the second photo in the first post has the best view of the ridge and tip. It looks like it's aligned with the shank of the diamond, so setting SRA based on the angle of the shank should be good.

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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by 33audio » 07 Apr 2019 06:46

Hi Folks:

Yes, I would say there is something wrong with it. A square shank diamond should be pressed into a new cantilever. If the retipper used the old cantilever I would say the work is sub-standard. The excess glue is a giveaway. The only place I have seen a glue job like that is on cheap aftermarket stylii.

Nude diamonds are often pressed into the cantilever with no glue, or a little glue to give some support.

Gluing a diamond is almost impossible. As far as I know, the proper way to secure the shank in the cantilever is to press it into a properly cut square hole. That glob of glue is probably holding the diamond in no telling what position and it may fall out if there is no compression from the cantilever around the diamond.

The problem is probably going to be that the shank is not square in the cantilever.
If off even a couple of degrees (rotated) it could damage records.

The rake angle should be about 18 degrees after the tonearm rests on the record.

If you see white snowy deposits on the tip after a few minutes of playing then you are cutting vinyl. Regards, Mark

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Re: microscope pix of newly retipped microridge stylus - do they look right

Post by Sunwire » 07 Apr 2019 07:49

My Jico SAS needles have glue around the diamond. Lots of glue.
I've seen plenty of other close-ups of high quality needles with glue.

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