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Re: My new alignment template generator

Posted: 28 Jan 2019 18:29
by Japi Roelofs
It's in the 'Tools' section.

Re: My new alignment template generator

Posted: 28 Jan 2019 18:30
by savakntr
Thank you

Re: My new alignment template generator

Posted: 28 Jan 2019 19:41
by Sunwire
By applying the P2S distance of 258 mm to the calculator, lets say for Lofren A (IEC), the result, on printing, for Effective lenght is 273.025 mm instead of 273.4mm (specified by VPI). in order, for me, to match the VPI specified Effective lenght of 273.4mm, the P2S distance in the calculator, should be increased from 258mm (as specified by VPI) to 259.04mm (as per the calculator)

Therefore should I increase the P2S distance and comply with the calculator in order to comply with VPI effective lenght or keep it as specified from VPI and have different effective lenght?
It has been said probably dozens of times in this thread in various ways:
It is NOT important to match the tonearm manufacturers Effective Length (or overhang) specification.
Trying to make them match will drive you crazy.
The alignment you choose with the tool will determine the Effective Length (and overhang). If this is different from VPI's specification, that is NOT a problem.

So, leave the P2S distance as it is.
You will end up with a different Effective Length from that specified by VPI.
That's perfectly OK.

Re: My new alignment template generator

Posted: 18 Feb 2019 18:31
by T68
Eehh. Trying to align my Shure m75 on the Dual601 using the Chpratz protractor. But it's almost impossible to see if the alignment is good since the sled is obstructing the view. Any suggestions how to do this?
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Re: My new alignment template generator

Posted: 18 Feb 2019 18:42
by T68
Ok, a bit easier with a protractor with the perpendicular grids :-)
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Re: My new alignment template generator

Posted: 20 Feb 2019 03:15
by Conrad Hoffman
FWIW, I align to the cartridge body rather than the cantilever. I think the latter is prone to all sort of errors, but recognize it will be debated forever. That said, I read about a nice trick when visibility is bad. Get a pack of mechanical pencil leads and some double stick tape. Find a surface on the body, hopefully the front, and stick a lead on it. The leads are usually very straight and will give you a good baseline to sight on. You may have to extend the lines on the template, but can often work entirely outside the head shell. Follow the arc, get lined up with the inner grid using the lead and job done.

Re: My new alignment template generator

Posted: 20 Feb 2019 10:17
by andyr
T68 wrote:
18 Feb 2019 18:42
Ok, a bit easier with a protractor with the perpendicular grids :-)

IMG_20190218_193952.jpg
An arc protractor (specific to your arm's eff length) is the only way to go, IMO.

Andy

Re: My new alignment template generator

Posted: 25 Feb 2019 17:49
by wolfie62
Go here, it’s the 3rd link down on his list for the arc protractor.

http://www.conradhoffman.com/chsw.htm

Re: My new alignment template generator

Posted: 07 Jun 2019 22:24
by Notoman
I just wanted to say T H A N K Y O U to Conrad.
Used to calibrate my turntable and got rid of the distortion in the inner grooves of some records. Also I got a better sound.
You can´t see how misaligned is your cart until you use this tool!

Re: My new alignment template generator

Posted: 15 Jun 2019 17:15
by freestyle_gus
This is completely brilliant. Thanks!

The Stevenson A Arc stopped the second half of each side sounding like a bag of spanners 😀

Re: My new alignment template generator

Posted: 16 Jun 2019 20:19
by StuieJW
I think I have finally (after numerous attempts historically) found/created a Conrad template that nearly fits the arc and near as dammit both null points on my Pro-ject Debut Carbon III. Someone selling an alignment on Ebay for the Pro-ject arm and they stuck all the info on it. I fiddled with the settings in Conrad`s generator and got this close, based on Lofgran A.

Alignment wasn`t a mile away from what I was using but no issues from start to finish.

45748

Edit: Printouts are always spot on size wise but does make me wonder if tonearm isn`t really 200mm to spindle on my deck, could be 199mm or 201mm, might experiment 1 day.

Re: My new alignment template generator

Posted: 16 Jun 2019 20:40
by Conrad Hoffman
Thanks for the kind words. I do try to pop in every week or more often in case anybody needs help. Usually others beat me to it! It's interesting to fiddle the numbers to match other templates/alignments, but for the most mathematically perfect alignment, go by the inner and outer limits of the groove on your record and the pivot to spindle distance. The record standards are usually best, but if you find 90% of your records fall short on the inner (usually classical), don't be afraid to bring the number in to match what you usually play.

Some believe that Baerwald implies two specific inner and outer null points (not to be confused with inner and outer groove radius), but that's not exactly true. Those null points are dependent on the inner and outer groove radius chosen. I can think of various reasons a given template or tt manufacturer might come up with their own secret sauce, but IMO you're better off to use the actual measured numbers and never ever pay attention to the useless overhang number! If you measure it yourself you can have pretty good confidence it's correct, compared to something processed by the marketing department. Well, unless you're using a headshell gauge, in which case measurements and templates don't apply.

Re: My new alignment template generator

Posted: 16 Jun 2019 20:45
by StuieJW
Good info Conrad, thanks. I actually got to a point of doing my overhang by ear and aligning with the pro-ject alignment guage as I could never follow an arc, this is very close though and again not a mile off where I was.

Everything is sounding excellent so I suppose that`s the main point.

EDIT: Tbh for anyone with a Pro-ject 8.6 arm and a 2M cart, about 2mm from the front of the mounting is pretty much where you should be and align to whatever null point you prefer.

Re: My new alignment template generator

Posted: 25 Jun 2019 16:41
by northa40
StuieJW wrote:
16 Jun 2019 20:19
I think I have finally (after numerous attempts historically) found/created a Conrad template that nearly fits the arc and near as dammit both null points on my Pro-ject Debut Carbon III. Someone selling an alignment on Ebay for the Pro-ject arm and they stuck all the info on it. I fiddled with the settings in Conrad`s generator and got this close, based on Lofgran A.

Alignment wasn`t a mile away from what I was using but no issues from start to finish.

45748

Edit: Printouts are always spot on size wise but does make me wonder if tonearm isn`t really 200mm to spindle on my deck, could be 199mm or 201mm, might experiment 1 day.
Hi StuieJW I have been using this for 3 or 4 years and works with all the pro-ject 8.6in arms. Here's a link to a video I did 3 weeks ago about my 1Xpression and what I did to battle motor noise. The protractor bit is at the end of the video. Sorry for the quality, its my first go at posting anything.
https://www.youtube.com/watch?v=K4BjKnuPpwg&t=479s

Re: My new alignment template generator

Posted: 10 Jul 2019 14:50
by NOYB
Have only made it about half way through this thread so far and want to get started on the alignment.

KD-5070 manual tonearm specs
Type: S-shaped pipe
Effective length: 225 mm
Overhang: 15 mm

Resulting in 210 mm P2S. Which is also what I measure. So that's a good thing for starters I think.

To determine whether to use DIN or IEC, I've measured half a dozen favorite records and all have inner groove radius greater than 60 mm. From that I conclude to use IEC. Is that appropriate?

Next is to chose which strategy to use.

Lofgren A / IEC
Covers greater portion of the record between the null points than Lofgren B. I'm guessing that would result in less overall tracking error.

Lofgren B / IEC
Has the longest effective length. Don't recall reading anything about that being an advantage though.

Stevenson A / IEC
Seems to come closest to the mfg EL & OH specs. Though from reading in this thread so far that doesn't seem to be important. Also the null points radius seems to be a little small considering most of my albums have IGR greater than 60 mm.

I'm leaning toward Lofgren A / IEC. For what reasons would I want to chose one of the others?

Lofgren A / IEC
Inner null radius = 65.998
Outer null radius = 120.891
Effective length = 228.207
Overhang = 18.207
Offset angle = 24.172

Lofgren B / IEC
Inner null radius = 70.285
Outer null radius = 116.604
Effective length = 228.682
Overhang = 18.682
Offset angle = 24.118

Stevenson A / IEC
Inner null radius = 60.325
Outer null radius = 117.417
Effective length = 226.237
Overhang = 16.237
Offset angle = 23.130

Thanks

P.S. Conrad, Great tool. Easy to use. A web base version would really be great to open up access to MAC/Linux/BSD/etc.