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Someone with a Cowells 90ME

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Dell22/01/2020 16:42:49
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41 forum posts
13 photos

The Cowells 90ME lathe I just purchased has a part missing from the Headstock spindle indexing unit could anyone supply a photo and dimensions as I think that making one would be a good place to start me of getting reacquainted with using a lathe.

thanks in advance Dell

Michael Gilligan22/01/2020 23:23:23
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16366 forum posts
714 photos

As no-one has come forward, Derek ... I’ve done the best I can

Can’t locate this image on Cowells website, but it’s posted on pinterest dont know

... Hopefully this is what you are looking for.

.

b2b77dfe-6480-423f-993e-253c1ba9d414.jpeg

.

Click the image for higher resolution.

MichaelG.

not done it yet23/01/2020 06:58:21
5010 forum posts
20 photos

Higher resolution? How does it do that? Shirley, it is just a larger picture (same number of pixels) - just the same as expanding the pic on the screen (Ipad)?

JasonB23/01/2020 07:12:35
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Moderator
18875 forum posts
2078 photos
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Image above is 495 x 755 pixels but the clicked image is 768 x 1171 which is higher resolution in my book

Pero23/01/2020 08:17:40
115 forum posts

Hi Derek

I've finally fought my way through to the ME90 ( currently attempting to improve access to my workshop in the hope of doing something useful ).

The headstock indexer, as shown in Michael's post, has four components ( plus a few screws ). These are the index wheel, a machined rectangular mounting block for the detent arm , the detent arm itself which is a cranked piece of steel bar, and the detent pin which is a piece of turned and threaded rod knurled at one end and pointed at the other.

The pin itself is either chromed or more likely stainless steel as it is bright and shiny and shows no sign of corrosion, the mounting block probably steel ( based on appearance and colour ), the arm I am not certain about - possibly spring or hardened steel.

If you let me know what part you are missing I will see if I can produce some accurate measurements and also check any relevant screw lengths and threadforms.

Pero

Michael Gilligan23/01/2020 08:32:56
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16366 forum posts
714 photos
Posted by not done it yet on 23/01/2020 06:58:21:

Higher resolution? How does it do that? Shirley, it is just a larger picture (same number of pixels) - just the same as expanding the pic on the screen (Ipad)?

.

Jason is correct ... albeit what I uploaded to my Album was a more useful 1343 x 2028

[ it gets reprocessed by the forum software ]

not done it yet ? ... perhaps you should experiment

MichaelG.

Edited By Michael Gilligan on 23/01/2020 08:34:53

not done it yet23/01/2020 08:37:16
5010 forum posts
20 photos
Posted by JasonB on 23/01/2020 07:12:35:

Image above is 495 x 755 pixels but the clicked image is 768 x 1171 which is higher resolution in my book

It is in my book, too. But how do they do that? Interested to learn something.🙂

Michael Gilligan23/01/2020 09:29:22
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16366 forum posts
714 photos
Posted by not done it yet on 23/01/2020 08:37:16:
Posted by JasonB on 23/01/2020 07:12:35:

Image above is 495 x 755 pixels but the clicked image is 768 x 1171 which is higher resolution in my book

It is in my book, too. But how do they do that? Interested to learn something.🙂

.

The image displayed in the thread is downsized to fit the forum

It is also an active link to the image stored in my Album

... you have an iPad : a long-press on the image will display details of the link.

MichaelG.

Philip Rowe23/01/2020 10:18:15
182 forum posts
14 photos
Posted by Michael Gilligan

... you have an iPad : a long-press on the image will display details of the link.

MichaelG.

Well I never! I've been using a tablet for maybe 7 years and I never knew that.

Thanks Michael.

Phil

Andrew Johnston23/01/2020 10:29:26
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5660 forum posts
653 photos
Posted by not done it yet on 23/01/2020 06:58:21:

Higher resolution? How does it do that? Shirley, it is just a larger picture (same number of pixels)

It's a standard signal processing operation called up-sampling. The sampling rate is increased and the values of the extra samples determined by interpolation from the existing samples. Linear interpolation is the simplest, but is not very effective. Using more samples on both sides of the sampling point gives better results. The data rate is increased, it's a moot point as to whether the information entropy is changed.

Andrew

Michael Gilligan23/01/2020 10:53:21
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16366 forum posts
714 photos
Posted by Andrew Johnston on 23/01/2020 10:29:26:
Posted by not done it yet on 23/01/2020 06:58:21:

Higher resolution? How does it do that? Shirley, it is just a larger picture (same number of pixels)

It's a standard signal processing operation called up-sampling. […]

.

For once, Andrew ... I can confidently disagree with you.

What you say is true ... except that it doesn’t apply here.

My cropped screenshot was

  • uploaded at ‘high’ resolution
  • stored in my album at ‘medium’ resolution
  • displayed in the thread at ‘low’ resolution

MichaelG.

.

P.S. apologies for the earlier typo.

1343 x 2028 should read 1343 x 2048 [it was an edge-cropped screenshot]

Dell23/01/2020 17:18:55
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41 forum posts
13 photos

Hi all and thanks for replies although most have to do with pixels

Michael Gillian & Pero

as you can see from my photo most of it is missing

Dell

a8fceb9c-8187-4030-985f-6eb9e43020bf.jpeg

Dell23/01/2020 17:18:55
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41 forum posts
13 photos

Hi all and thanks for replies although most have to do with pixels

Michael Gillian & Pero

as you can see from my photo most of it is missing

Dell

a8fceb9c-8187-4030-985f-6eb9e43020bf.jpeg

Dell23/01/2020 17:20:10
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41 forum posts
13 photos

Sorry for the misspelling of your name Michael.

Former Member23/01/2020 18:24:29
1329 forum posts

[This posting has been removed]

Dell23/01/2020 19:39:06
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41 forum posts
13 photos

Hi 34046

yes that’s correct.

Dell

Michael Gilligan23/01/2020 19:56:32
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16366 forum posts
714 photos
Posted by Derek Allum on 23/01/2020 17:20:10:

Sorry for the misspelling of your name Michael.

.

No problem, Derek ... but thanks for caring.

MichaelG.

Former Member24/01/2020 11:21:28
1329 forum posts

[This posting has been removed]

Dell27/01/2020 17:16:20
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41 forum posts
13 photos

Hi everyone

I have decided to purchase the parts from Cowells as it’s only £29 .

and if anyone is interested I checked the price of the latest 14X1.0 shaft £129+ the dreaded.

Dell

Former Member27/01/2020 17:19:54
1329 forum posts

[This posting has been removed]

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