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Member postings for David Colwill

Here is a list of all the postings David Colwill has made in our forums. Click on a thread name to jump to the thread.

Thread: MoD solution for lack of RN Carrier Force
27/07/2012 02:03:38

The take off should be fairly easy, the main problem as I see it is landing it back in there!

Thread: Maybe CNC
10/06/2012 00:23:15

Why not consider the posibility of buying a new manual machine and converting it. There are some financial savings to be made although these aren't great and you end up with a machine that you fully understand and can fix and maintain as required. There is such a wealth of information and support out there that this is possible even if you're not too hot at electronics.

As for CAM although I do have full 3D CAM available I tend to do Just about everything on Desk CNC which costs about £150 ish and is a doddle to use. I have looked at loads of CAM packages and have tried demo versions of many of them angry. I would steer clear of spending any serious cash until you are absolutely sure that you are getting something that you are happy with and have seen, used and made to work.

Just my two pennyworth smile p

Thread: Bridgeport siting
21/05/2012 06:49:31

I'm in the processof rearanging my workshop. Currently the bridgeport is in the middle of a wall. Is it more efficient to have it in a corner?

Many thanks

David

Thread: Article submissions
21/05/2012 06:27:12

"PLEASE ACCEPT MY RESIGNATION. I DON'T WANT TO BELONG TO ANY CLUB THAT WILL ACCEPT PEOPLE LIKE ME AS A MEMBER".

Groucho Marx

Thread: Floor plans
16/05/2012 17:45:49

I'm about to re arrange the layout of my workshop and am going to prouduce a CAD drawing of the floor. Then I can make templates of the machines which can be moved around to explore various layouts. Being lazy I felt sure that others before me would have produced DFX drawings of various machines, it seems not. I first tried searching for the lathes that I own,no joy. I then thought surley something as common as a super 7, still no joy.

Just a thought but seeing as we often have the same types of machine could we not store the outlines as DFX's for this pupose and make them available to all?

David.

Thread: mini lathe advice
28/04/2012 11:35:58

There is a chap on www.homeworkshop.org.uk selling a ML10 for £550.00 with tooling. This would do all you would need and more. Don't hang around tho it will be gone soon.

David.

Ps I don't know this chap but was trying to justify a trip to the Wirral myself!

Thread: Vibration Ramping
18/04/2012 10:35:26

If I don't lock the quill on my bridgeport clone it will slowly pull in giving the same effect.

David

Thread: Surface grinding finish
10/04/2012 15:02:34

I have also struggled with surface grinding. I have managed to get reasonable results by trial and error. This surely would make a good article for MEW. I would be interested to know how often should the wheel be dressed and how do you compensate for wheel wear?

David

Thread: Casting strangely shaped lumps of lead
07/04/2012 09:39:42

I'd love to buy your lead but fear the postage to the UK may be a tad out of my reach.

Thread: Datum point problem
13/03/2012 10:27:34

Face them off in 4-jaw, or clamp 4-jaw to table as a vice (very useful).

Good tip! I'm suprised I haven't heard it before.

Thread: If you can't beat them.....
12/03/2012 10:01:05

Given the spate of recent postings some of you may wish to read some of the many delights here.

http://www.engrish.com/2011/10/did-i-mention-miserably/

Enjoy

Thread: Small CNC or bigger manual mill?
09/03/2012 17:45:35

You could always do what I did and CNC your bridgeport when you're ready smile p

Thread: surface temperature measurement
08/03/2012 15:24:54

Mine is a 179 which I won by filling in one of those [not so] daft questionairs while waiting in RS. It is a fantastic piece of kit!

08/03/2012 13:43:32

Some time ago I bought one of the hand held infra red thermometers (the type that has a laser spot) from Maplins for £19.99 on offer. I cheked it against my Fluke multimeter and it was suprisingly accurate. I've used it many times around the workshop and it is a very useful thing.

David.

Thread: Lathe recomendations
20/02/2012 08:13:52

Having gone through a number of smaller lathes mainly aimed at the hobby market I have now got 2 manual lathes, a Dean Smith & Grace 13 30 and a Smart and Brown 1024. Both are fantastic machines and were ex university. They are certainly a step up from the lighter hobby machines. The only pitfall in my opinion about owning a large lathe like the DSG is that changing chucks tends to be an operation involving much grunting and groaning and can leave you cursing when you're working on a tiny piece of square bar. I like the 1024 because it is small enough to manage without too much trouble but I often find myself wishing I still had my ML10.

David

Thread: Magnetic chucks on lathes
16/02/2012 15:16:46

The swarf is not a problem as it is is attracted to the face of the chuck and is easily wiped off when the chuck is de-energised.

16/02/2012 14:19:53

Further to my earlier post I have now fitted the chuck to a spare back plate ( it would have been pretty useless otherwise ) and have had a play. It works surprisingly well. As an experiment I faced an M12 washer ( 13mm od 23mm id ) with few problems. I don't envisage doing anything this small but it's nice to know that I can. The only problems I had were slipping due to taking too heavy a cut but the centre piece held the washer central and there didn't seem to be any danger of it flying off.

So if you have one it could be a useful addition to your lathes armoury. cheeky

18/01/2012 14:33:08
My chuck as a 1/2 1nck hole about 1/4 inch deep in the centre which I intend to use as a register to centre the washer and to stop a certain amount of slip.
18/01/2012 13:46:17
Hi. I have a number of thin washers to face off. I'm thinking of using a magnetic chuck to hold them. Obviously I'm aware that magnets don't have great holding power when resisting a turning motion but I was only going to take very light cuts with a sharp tool. Is this a good idea (bearing in mind I have to mount the chuck on a backplate first)? What are the pitfalls apart from having your throat cut by a rapidly spinning shuriken?
Many thanks in advance.
Dave.
Thread: Stainless steel shaft
17/01/2012 09:39:11
Is this condition described as obround?
Dave.
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