Member postings for Trevorh

Martin

Thanks for the update

BR

Trevor

Hi Peter, But if we just printed part of the circumference as per Martins post it could possibley fit

Thanks

Trevor

It just needs to be offered up and then pass through the jig to check thickness and profile

The photo was to get across the idea of what I needed to measure

Thanks Jason

Hi Peter,

I do have access to a 3D printer its a Prusa i3, But I dont have access to a drawing package so can't generate an STL file, but worth thinking about

thanks

Trevor

Hi Jason

Now your getting creative - that way opens all new kinds of thinking and I might already have some material to hand that I can play with

I will report back, oh its definately 150mm RAD so a 320mm plate in the lathe - which will fit in my GH1240 gap bed lathe

Time to experiment

Hi Guys

These are all excellent ideas and quite valid and I must admit I wasn't sure How I was going to polish or protect the boards as they were being measured

as Jason and Robert say maybe look at different materials as long they can hold a reasonable tolerance +/- 0.5mm then all good

The idea of Dowels by Martin would certainly make it an easier operation and I do have DRO on the Mill so should be a reasonable operation

delrin would certainly be lighter and again is something to be considered

Once again the forum comes to the rescue - Great

Trevor

Hi Jason

Yes your correct - I am just waiting on the sailing club to confirm whether its a Raduis or Diameter they want

Once I know this I can determine the length of the Plate /Bar and its width

Thanks for the advice Guys

appreciated

trevor

Thanks Hopper

The material you mentioned - who would you suggest to get it from?

Here is a photo of a dagger board that I need to be able to measure its bottom radius as well as its width, thickness and tapered edges

Ok so here is the sketch apologies for my poor attempt to show what I am trying to achieve

Hi Hopper,

Just trying to sketch it now and upload it

Basically imagine a pencil the same shape at each end but about 150mm point to point and 15mm thick

so a slot whoch tapers at each end down to a 3mm radius

then on one side of the plate/bar a relief machined into the it at a 150mm raduis to enable you to offer up a "disc" to check its at the correct raduis/diameter

turn the disc on its end and see if it drops through the slot

I hope to have the sketch soon

regards

Trevor

I have been asked if its possible to come up with a design for a measurement Jig for measuring Dagger Boards used on Cadet sailing dinghy's by my club

The plate would need to be approx 25mm thick by 300mm long by 250 wide

It will need to have 2 slots machines into it approx 150mm long by 15mm wide narrowing to 3 mm radius at each end

on the opposite side it would need a portion removed and radius at 150 mm so it could be offered up to a radius on the dagger board to check its profile

The slots I can probably do but how to machine the recess at a 150mm on the back

1. without causing any distortion

2. achiving such a radius

I have a warco WM16 mill with extended table and a basic rotary table

Lastly is the Aluminium the best material

Any advice greaty appreciated, I should say this will be going with our cadet youth sailing fleet to the world championships in Melbourne Australia this december and is to be used just as a quick check jig nothing official

Thanks

Trevor

Edited By Trevorh on 09/08/2022 10:10:07

+1 for the Prusa gift from my son and it worked straight off the bat, have printed various size components and with different filaments with no issues at all

Very simply to use and their software is very easy to use to manipulte the models for size and alterations

Trevor

Hi Ramon,

have a look at this thread

https://www.model-engineer.co.uk/forums/postings.asp?th=144596

it discusses how to fit the power feed to a WM18 and WM 16

might be useful for you

Regards

Trevor

My PC updated today W10 and now after a few minutes of use a get a Blue screen stating that "Critical Struture Corruption" has occured and that it needs to gather the information and reboot

After speaking to my son (a professional computer programmer) he helped me install a microsoft program called Show Hide (WUSHOWHIDE) can be downloaded from the MS downloads area

It allows you to interagate the updates and decide if you want them or not

If not you simply select hide and it removes it from the update but more importantly flags it for any future update that come along and doesnt try to Re Install it

After I removed the 3 new updates with this program all is now back to normal

Simply google MS Show Hide

Regards

Trevor

Edited By Trevorh on 15/06/2020 18:53:50

Sam A simple but expensive option - Buy an Ent and come back from the dark side...

Hope you get it out without any damage to the mast Mate

cheers for now

Trevor

As Sam states it will go in approx 50mm, I had to remove mine from my enterprise mast and it was 50mm inside but very good fit - I believe the nylon swells slightly on top of the tap in fit makes it quite difficult to remove but using the taped hole and slide block is the best way as trying to just twist will break 1 of the legs

cheers

Trevor

Finally had need to use my drilling clamp jig, nothing too complicated or difficult by the standard of others but none the less Pleased to have used the jig and happy with the result, just not sure how to rotate the photo's

Edited By Trevorh on 06/05/2020 07:49:47

In the Industrial Printing industry the manufacturers always age the cast Central impression Cylinders for 12 months before machining the face

The castings can be anything from 20 Ton upto 40Ton typically 2 metres wide and a diamter of approx 2.5 metres

these are then machined to a TIR of 0.02mm across the face and ends

this happens with most German and Italian manufacturers

The Italians have a storage area at the back of the factories with lines of these castings - quite impressive

Trevor

Edited By Trevorh on 29/04/2020 15:22:31

Thanks for that Steve, I have passed this onto my lad who has a printer

stay safe

Regards

Trevor