soba centre square

Hi,

After spending an exellent day at the Harrogate mex ,I bought this centre square from one of the stalls. As you can see from the picture it does not quite live up to the promise on the packet it came in. I think I could have made a better job out of lollypop sticks using a knife and fork! grrrr .

Oh well there are many stories like this I'm sure .

Regards OM (aka Victor Meldrew).

Hi oil magnet.

You can still use it although I would send it back for a replacement including cost of postage.

Draw four lines at 90 degrees.

The centre is in the small square in the middle.

regards david

You could always make one, very simple and you would only have yourself to blame if it was not spot on!

Edited By KWIL on 18/05/2012 10:20:29

Are you sure that it is the straight parts of the square are contacting the bar annd not just the tips. Looking at the picture the bar looks to be on the limit of the capacity of this square. If the square is the fault it is a very large error in manufacturing. I was looking at some 90 Deg. squares on a stand at Harrogate and they were well off square. I finished up buying a Soba one which I could not check at the time as it was in a sealed box. It did turn out to be OK.

Les.

Hi OM

Well it's nice to know that they have Friday afternoons in China too!

Seeing your pic I whizzed out to the workshop and had a look at my SOBA square - I think you were a bit unlucky!

Yes easy to make I guess but you could spend all your time making tools and ( when they work!!) these are cheap enough.

Regards

Norman

Hi

Just out of interest I transferred your picture of said centre finder into my drawing package and measured the included angle between the blade and the exposed leg. This turned out to be within 0.5 degrees of 45 degrees. While not a particularly accurate way to check things it does indicate that the error you are getting is greater than any apparent error of the finder. I support the comments by Les that the bar looks to large for the finder. Prior to sending it back I would try it out on a smaller diameter rod and see if the same error exists there.

Cheers

Martin

Superimposed the bar/rod onto the finder and it should fit between the legs albeit a bit close but should be OK . A quick measurement fom the photo on the drawing package supports this with the legs measuring, from photo, 50mm and the radius of the bar/rod 38mm. Not true world but gives a relative measurement that confirms clearance

Edited By Martin W on 18/05/2012 11:05:02

Edited By Martin W on 18/05/2012 11:09:44

Bit picky maybe Martin but the packet says 40mm !

N

Hi ,

Thats a scary thought njh, 2 billion cock ups every friday afternoon !.

The error is just as bad on smaller diameters, I used a larger one one just for the photo.

om

Did you use a scriber,or a pencil? Ian S C

Hi Norm

Yeah I know but in this world everything is relative so  I measured relative to what I had got , namely the picture. Anyhow what does the 40mm refer to? Is it the length of the blade, the guides or the maximum diameter that can be accomodated? I don't know so left it how it turned out so 'Bob's me uncle' and that's relative as well.

Cheers and take care.

Martin

Edited By Martin W on 18/05/2012 13:08:18

SOBA is Indian. I believe that they do have friday afternoons there too.

Hi all,

Just unlucky this time I guess. Its only a small item so more annoying than anything else.

Two more pics, the penny shows the square remedy suggested by DavidClark1, and the other showshow badly offset the scribbing arm is.

Thanks for the interest

Regards om

Edited By Oil Magnet on 18/05/2012 16:07:11

Edited By Oil Magnet on 18/05/2012 16:07:48

Hi There

You should be able to file or mill that true.

You don't need to go right into the vee, just far enough.

regards David

Hi,

I will give it a go David, lollypop sticks on standby !.

om.

Hi Ketan

Whoops - not Chinese but Indian eh? Oh well SO BE (A) it then !! ( Sorry)

Well, either way, mine works well and the finish on it is good.

Off for a lie down now.

Regards

Norman

Oil Magnet if I may suggest go to your local trading standards officer (if they are not in conference (aka down the pub). This is totally contrary to the Sale of Good Act as it is “NOT of merchantable quality and fit for the purposes for which it was intended” i.e. to mark the centre of a round item.

Mind you if they were anything like the lot where I used to live you could NEVER contact them!

rdgs

Dick

It looks more drunk than soba

Martin.

I will take it with me to the pub and then try to catch it up.

om.

If I'm not completely off my shoes, this would rather need the mysterious putting-on tool than milling something off (and making the error even larger).

But who knows, maybe I am...

Greetings, Hansrudolf

Hi Hansrudolf, take another look at OM's close up photo of the square, it clearly shows that the marking off blade is over the centre point of the vee, hence the need to cut some off.

Regards Nick.