Re: Service manual scan post processing
John,
Just so I understand, "Vision" (only) performs the OCR process step of reproducing a printed document in OCR PDF form? Or did I mis-read your post?
I'm hesitant to bring this up because I'm only just barely beginning to
understand it and create a workflow, but as an alternative to Adobe,
there is a Google Cloud "Vision" API that does OCR of PDF files.
According to ChatGPT, it does a better job than the various open source
tools would, though I don't know how it compares to Acrobat.
You need a Google cloud or workspace account, and from there you set up
a cloud bucket to hold the raw PDFs, and then create an API Key to the
Vision API.? Then a Python script can call the Google APIs to trigger
conversion of the PDF to a text only document.? Most of the pain is
getting the bucket and API set up with the right permissions and account
info.
Believe it or not, I used ChatGPT to walk me through the whole process
and even write the Python script!? (Which I'm happy to share.)
Google lets you process 1000 pages per month for free, and it's an
additional $1.50/1000 pages thereafter.? But I found that my Google
Workspace account gave me a $300 credit, so I can do a lot of conversion
before I have to pay any real money.
Anyway, this may be too far down the rabbit hole, but looks like it
would work well for processing large numbers of documents automatically;
even at $1.50 per thousand pages, it's pretty inexpensive.
John
----
On 2/17/25 10:13, Peter Brown via wrote:
> Thanks, Alexandre? I will take a look.
> Seems like Acrobat Pro v11 is no longer supported? - any idea experience
> of their current product?
>
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Re: Service manual scan post processing
Hi Evan,
I understand where you are coming from, best possible is best possible
.. but one manual I have been asked about is 38 fiches long - almost 8Gb
?
I am also wondering if current predictive tools might also be able to repair pars of the scans where low contrast causes portions of e.g. single letters to drop out.
If the scans can be post processed so that all of the text information is 100% there is less case to store this at higher resolution - images are different, storing these at best possible resolution seems wise
Peter
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Re: Service manual scan post processing
Why not just upload the uncompressed output to and let people compress it in the future? I think if you upload the raw jpeg files they even do that for you.
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
?
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
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Re: Service manual scan post processing
If anyone wants to have a go, there are some sample scans here?
?
Files - A temporary directory for photographs and help relating to emails and posting - 8430A 08340-90021 Service vol 1 section1
?
They are PDF'd from the scanning software with minimum compression.? The software will also produce .tiff files if these are a better place to start
?
Peter
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Re: Service manual scan post processing
I just saw John's post. I forgot to add to my earlier post (below) that I also convert all documents that I scan to OCR format as well.
I do not intend for this follow-up post about my omission to be any comment, observation, endorsement or criticism about John's post.
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Re: Service manual scan post processing
This +1. 600dpi, G4 compression. (Not JPEG compression -- Never JPEG) I've got some terrible Linux scripts that use NETPBM/ImageMagick/Tiff tools to build PDFs for the few I've ever scanned, but the process varies greatly for every different document. On Mon, Feb 17, 2025 at 10:14?AM Dave Daniel via groups.io <kc0wjn@...> wrote:
I usually scan the manual pages at 1200 or 600 dpi to PDF form and save them. Then if I want to load them on a reading device or share them, I'll use Adobe to downsample the file(s) to a lower resolution, usually 300 dpi.
DaveD
KC0WJN
On Mon, Feb 17, 2025 at 09:42 Peter Brown via groups.io <peter@...> wrote:
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
|
Re: Service manual scan post processing
Hi John,?sounds interesting.
Would you be interested in running a few sample pages through the process?
Peter
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Re: Service manual scan post processing
We switched from the exorbitantly priced Adobe to PDF-XChange several years ago at work (and me personally) and could not be happier.? Excellent and very functional product at 60-70 USD per user.
?
?
Again, highly recommended.
?
Hal
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Re: Service manual scan post processing
I'm hesitant to bring this up because I'm only just barely beginning to understand it and create a workflow, but as an alternative to Adobe, there is a Google Cloud "Vision" API that does OCR of PDF files. According to ChatGPT, it does a better job than the various open source tools would, though I don't know how it compares to Acrobat.
You need a Google cloud or workspace account, and from there you set up a cloud bucket to hold the raw PDFs, and then create an API Key to the Vision API. Then a Python script can call the Google APIs to trigger conversion of the PDF to a text only document. Most of the pain is getting the bucket and API set up with the right permissions and account info.
Believe it or not, I used ChatGPT to walk me through the whole process and even write the Python script! (Which I'm happy to share.)
Google lets you process 1000 pages per month for free, and it's an additional $1.50/1000 pages thereafter. But I found that my Google Workspace account gave me a $300 credit, so I can do a lot of conversion before I have to pay any real money.
Anyway, this may be too far down the rabbit hole, but looks like it would work well for processing large numbers of documents automatically; even at $1.50 per thousand pages, it's pretty inexpensive.
John
----
toggle quoted message
Show quoted text
On 2/17/25 10:13, Peter Brown via groups.io wrote: Thanks, Alexandre? I will take a look.
Seems like Acrobat Pro v11 is no longer supported? - any idea experience of their current product?
|
Re: Fan and ball bearings on 8340/8341 Sweep Generators
On Mon, Feb 17, 2025 at 12:18 AM, Calvin Guan wrote:
Is there a way to somehow remove the seal and re-grease the bearings?
Yes. and that's often your very best solution.
?
Grease is a mixture of oil and a soap thickener.? The soap is simply a medium that slowly dispenses oil over time, keeping the bearing lubricated. Old grease may have dispensed all its oil and may be useless by now. Cleaning out the old dried-up grease and replacing it with fresh is often possible and effective. Keep in mind that for a small bearing like this, you'll want a rather thin (not too viscous) high quality grease. Don't use too much grease. When run, the bearing should be able to push most of the grease out of the way. This is called channeling. The grease that's out of the way will continue to shed oil, which will reach the bearing races and do it's job there.
?
The ZZ on the end of the bearing number indicates 2 seals, one on each side. They can usually be pried out and pressed back in. In the worst case, if you damage a seal, just install the bearing with the damaged/missing seal facing the "clean" side of the installation.?
?
The C3 clearance shown for the replacements you mention is a medium clearance for a bearing. It is likely that Etri knows exactly how much clearance works well in their fans and has specified lower clearance bearings, C1 or C2. Some manufacturers have special grades for electric motor bearings, which would be appropriate here, but getting the right clearance will make for quieter running, which makes relubing the old bearings look like an even better option.
?
While it's possible that there's actual surface damage to the old bearing races or balls, this is extremely unlikely for loads this small.
?
Interesting that your cheap Amazon replacements are so poorly made that most of them won't even fit on your shaft. Those are incredibly poor tolerances.
?
--
Jim Adney
Madison, WI USA
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Re: Service manual scan post processing
Check ebay, etc. to see if someone is selling an older copy.
I've been using Acrobat X (10) for a long time with no proplems.
Thanks, Alexandre? I will take a look.?
Seems like Acrobat Pro v11 is no longer supported? - any idea experience of their current product?
|
Re: Service manual scan post processing
I usually scan the manual pages at 1200 or 600 dpi to PDF form and save them. Then if I want to load them on a reading device or share them, I'll use Adobe to downsample the file(s) to a lower resolution, usually 300 dpi.
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
?
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
|
Re: Service manual scan post processing
Thanks, Alexandre? I will take a look.?
Seems like Acrobat Pro v11 is no longer supported? - any idea experience of their current product?
|
Re: Service manual scan post processing
I scan a lot of manuals, pdfize it and thrown in my esquemateca (link in my sig)
I use Adobe Acrobat Pro (I believe V11), using low compression and clearscan. The output is great. Remember to mark the option "full page on screen" in properties before saving.
---8<---Corte aqui---8<---
- High quality schematics and service manuals FREE scanned by me
---8<---Corte aqui---8<---
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
?
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
|
Service manual scan post processing
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
?
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
|
Fan and ball bearings on 8340/8341 Sweep Generators
Just want to share my experience dealing with my noisy fan on my 8340s.
?
One of my 8340s started to develop loud fan noise to the point I need to do something. The fan is an ETRI 148VP 028030 AC fan. I took it apart, there are 2 miniature metal seal ball bearings. The mark on the bearing reads "ADR FRANCE Y3/16Z".? It's an unobtanium. After a lot of googling, it suggests it's a R3ZZ bearing. I measured and confirmed the demission.
?
I then order some R3ZZ bearings from Amazon, it's a 20-piece pack. Out of 20 bearings, only 4 will fit into the shaft, and it's loud as hell. So the cheap bearings one could easily buy is a no go. Don't even waste your time.
?
When I work on cars, I know NSK makes good ball bearings. They do have R3ZZ bearings but certainly not cheap. Does anyone have experience with NSK or other high quality miniature bearings?
?
Is there a way to somehow remove the seal and re-grease the bearings?
?
Regards,
Calvin?
?
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Re: Looking for RF Limiter specs
Dave, the first place I would look would be in the HP, Agilent, Keysight Microwave Accessory catalog. Probably looking at several years from 1990’s through 2006 will help you. All 5086-xxxx are listed as parts for instrumentation (not spec’d), they have equivalent model nos. listed in the Microwave Accessory (MA Cat) catalog (these are spec’d). Some of the catalog years also listed the part nos., but not always.
You will have to look at the instrumentation circuitry to get a rough idea of the frequency range, power level, etc. to match that instrument part no. to an instrument no. in the MA Cat.
Don Bitters
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Re: 5345A electronic counter *restoration adventure*
After reading a little more, I discovered that the clock signal for the display is not generated in A15, but in A14, specifically in U13 (pn 1820-1194 or 74LS193 up/down binary counter) . This signal is the result of divide by 64 the decimal point signal to use it for refresh the display.
?
I leave you the high quality diagrams of A14 and A15. I have put them together, because in the Artek manuals they are divided and it is very uncomfortable to explore them.
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Re: HP 8563E Shows Signal Present at 100MHz and below without an Input
What marker frequency do you get on the 0dBm signal?
It sounds like you are looking at the LO feed through signal, if so the marker on peak signal will be 0 MHz @ 0 dBm.
What do you see if you do an instrument preset (green button)?
At turn on, what is the start frequency? What is the stop frequency? With cal signal connected, can you run the self cal procedure? What happens when you narrow the span to 100, 10, 5.01, 5.00, 1 MHz, and 100KHz? Do it with the phantom signal, then with the cal signal. Cal signal 300 MHz @ -10 dBm
Please report back your findings.
Don Bitters
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Re: IPA type for 3.5mm connector cleaning
On Sun, Feb 16, 2025 at 07:51 PM, David Speck wrote:
Isopropanol (Often sold as rubbing alcohol) is very definitely toxic,
and does not require denaturing.
Non-the-less, the label on my CVS brand isopropyl alcohol clearly states that it has a bitterant added to it, and it does leave a residue.
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Harold Foster
Alexandre Souza
RubenRubio
Steve Byan