By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Electro etching

Etching a scale around a GHT Pillar Tool Table

All Topics | Latest Posts

Search for:  in Thread Title in  
Peter Ellis 521/01/2022 13:26:09
101 forum posts
11 photos

I have been thinking of Electro etching the 360deg scale around my Pillar Tool Table.

Does anyone know of a supplier for the masks ?

Cheers

Peter

DMB21/01/2022 14:15:39
1293 forum posts
1 photos

Could the masking be done photographically, perhaps using a cheap circular degree perspex disc from W H Smith(?), in the area of items aimed at school usage.

Peter Ellis 521/01/2022 16:26:10
101 forum posts
11 photos

Thank you, but it needs to be a linear scale, essentially a strip to wrap around the circumference to etch through.

David Noble21/01/2022 16:45:10
avatar
308 forum posts
15 photos

Would this help?

https://sundialsoc.org.uk/sundial-maker/photoetching-for-sundial-makers/

David

Tim Stevens21/01/2022 18:49:37
avatar
1584 forum posts

I wonder if I am the only one thinking 'What material is going to be etched? - What electrolyte is in mind?'

But then, we all enjoy a good guessing game now and then.

Regards, Tim

Peter Ellis 521/01/2022 18:54:34
101 forum posts
11 photos

Thanks David. I enjoyed watching it. I´ve even got Ferric Chloride. I´ḿ familiar with the process and have photo etched in the past. From his comments in the Postscript, it sounds like he is making his own masks.

Thanks

Peter

Peter Ellis 521/01/2022 19:00:17
101 forum posts
11 photos
Posted by Tim Stevens on 21/01/2022 18:49:37:

I wonder if I am the only one thinking 'What material is going to be etched? - What electrolyte is in mind?'

But then, we all enjoy a good guessing game now and then.

Regards, Tim

Given that I mentioned that I was wanting to etch the GHT Pillar Tool table, I assumed that most people knew that these are made of cast iron.

David Noble21/01/2022 19:12:26
avatar
308 forum posts
15 photos

Sealing the mask around a curved surface sounds interesting

At the risk of being tedious, here is another video that I found helpful with my clocks.

https://www.youtube.com/watch?v=qpy5O0b7cL8&list=PLZioPDnFPNsETq9h35dgQq80Ryx-beOli&index=9

David

Robert Atkinson 221/01/2022 20:17:25
avatar
1195 forum posts
20 photos

Yuo could use a photo sensitive resist like this:

https://uk.farnell.com/kontakt-chemie/positiv-20-200ml/positive-resist-photo-sensitive/dp/801010

and use a negative of the sacle to expose it Devlop (in sodium hydroxide/ casutic soda typically) then etch with ferric cloride. Scle cn be printed on clear film in a laser printer.

Robert G8RPI.

John Rutzen22/01/2022 12:53:54
348 forum posts
19 photos

Hi, I've had some success with electro etching nameplates for locos. I use Press n peel blue [ebay]. The print has to be done on a laser printer. The etching is done in copper sulphate solution, I found it best to do it face down so the material etched away falls off. It doesn't take long or much current, I used a small variable power supply. There was a good article about it in MEW some years back.

Andy_G22/01/2022 18:19:17
avatar
166 forum posts
Posted by Peter Ellis 5 on 21/01/2022 13:26:09:

I have been thinking of Electro etching the 360deg scale around my Pillar Tool Table.

Does anyone know of a supplier for the masks ?

Cheers

Peter

The guy in the video below uses a vinyl stencil (7:28 if it doesn't go there on its own). I see that there are plenty of places offering a cutting service, but haven't done it myself, so can't make any personal recommendations.

Peter Ellis 522/01/2022 18:57:29
101 forum posts
11 photos

Thank you. Yes, I had seen that. The sort of thing I need would be a straight strip, as it goes around the thickness of the table.

Andy_G22/01/2022 22:09:12
avatar
166 forum posts

I don't think there'd be a problem cutting a long strip (one would need to produce the artwork somehow though). It might be a bit tricky to get the scaling right to exactly match the table circumference. Maybe not so much of an issue if you were only proposing to etch the numerals, but (I think) quite challenging for the graduations.

DMB22/01/2022 22:42:02
1293 forum posts
1 photos

Sorry Peter, mis understood what was required.

Now I do and I would go about in similar fashion to that suggested by Andy G, in that as I have dividing gear, I would engrave the divisions and etch numbers and lettering, thus getting the best of both worlds, in my opinion. Certainly, dividing and engraving with some sort of scratching implement will overcome problem of matching a flat scale to a circumferential position. Etching letters and numbers would create acceptably good appearance.

John

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
cowells
Eccentric Engineering
Eccentric July 5 2018
Dreweatts
Rapid RC
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest