By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Sandgrounder

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

Thread: Magnetic Bench
06/03/2016 15:58:58
Posted by duncan webster on 06/03/2016 10:58:17:

WW2 ships were demagnetised using a large elctromagneti coil surrounding the ship, see

**LINK**

It would be a lot of work, but if you want to go down that route you could start with the transformer out of a microwave, a length of welding cable and a variac to control the current. Noneed to move the bench through the coil, wrap it round, then ramp the current up and down. Having set this running hopefully someone with relevant experience will tell us where I've gone wrong.

I would have thought a microwave transformer even when fed with a variac would have been a bit dangerous, if anything went wrong you could 2000V on the loose.

I've seen a homemade TV tube de-gaussing coil which was a few turns about the size of the tube and fed from the mains in series with an electric fire, the coil is then moved around in front of the tube and gradually moved away. No idea if that would work on a steel table though.

Thread: Expensive CAD and CAM software treated like a physical asset?
06/03/2016 08:08:48

When I put Autocad 2D and 3D Inventor on my PC many years ago details of the PC's hardware were taken by Autodesk and they then issued me with a 16 digit code based on my hardware serial numbers, I believe that even replacing one piece of the hardware, say the graphics board, would stop the software from running.

Thread: Useless light bulbs.
01/03/2016 07:03:16

One thing I found different between tungsten halogen and LEDs, both the tungsten halogen and the LEDs which replaced them in our kitchen are dimmable, now when the tungsten halogen were dimmed besides the quantity of light being reduced the colour temperature changes and at their dimmest they are dull orange, the LEDs which are cool white stay the same same colour and at their dimmest it's a bit like moonlight, I'm very pleased with them.

John

Thread: Appraising an electric motor
01/03/2016 06:50:06

Many years ago I attended a Tribolgy Course run by the Atomic Energy Authority and they said then that the main cause of bearing failure was over greasing, however that was 50 years ago and things do change.

John

Thread: Useless light bulbs.
28/02/2016 14:19:36

The MR16 tungsten halogens in our kitchen ceiling lights, 8 of them at 12v 36w have been running for about 12 years without any failures, obviously they are not on all the time, perhaps only and hour / day in the summer and 4 hours / day in the winter and being 12v running off transformers with soft start must have helped, however despite not having any problems with them I've just changed over to LED's.

John

Thread: homeworkshop.org
11/02/2016 06:51:47

It's back this morning.

John

Thread: Mystery Tool ?
06/02/2016 15:41:16

According it's Google it's a bobbin winder, sorry about the long link, I don't know how to shorten it.

https://www.google.co.uk/search?q=mattson+mora+bobbin+winder&biw=1343&bih=1056&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjV_bWivOPKAhVF2xoKHUCnC60Q_AUICCgD

John

Thread: I wish I could have an under drive lathe
04/02/2016 07:14:50
Posted by John Stevenson on 03/02/2016 19:38:17:

Hit Control F5, you are looking at an old page.

Thanks John.

John

03/02/2016 19:18:23
Posted by Ajohnw on 03/02/2016 12:16:06:

This is the sort of sale I feel people should look for when buying a lathe. A little down this page

**LINK**

Is it just me as I can't see anything on the "LINK" except ?

Issues with our server

We will be back

We have had a few issues with the server that the site runs on and are atempting to fix them as quickly as possible."

Thread: 'Sanding' Metal
02/02/2016 07:42:08

Depending on the type of weld and how easy it is to work on, when I had the stainless steel fittings tig welded for my boat ( a full size one nor a model ) all butt welds were finished off with flap wheels in an electric drill, changing direction with each change of grit size and finally with a calico wheel and buffing soap. On most of the welds it's impossible to see them.

John

Thread: Old PC Linux
29/01/2016 06:42:37

I've been using Linux Mint on my main PC for a couple of years now, it's as fast as the day I bought it with no crashes and blue screens, however I still have to use a Windows laptop to run programs like the Garmin installer for updating my Satnav,.

John

Thread: Metric lead screw on a Myford Super 7
25/01/2016 09:11:30
Posted by Brian Wood on 24/01/2016 19:23:21:

John Caines,

Welcome to the forum, I hope you will find it interesting and useful.

Thanks Brian, I've already found it both.

This is the metric handwheel on my Myford.

John

handwheel.jpg
24/01/2016 15:08:03

My first post but I have been looking in most days for a while now.

I don't know if they ever made a complete metric lathe but until my retirement I worked at a large R & D Lab' and they had the bottom half of an ML7, the bed, carriage & lead screw and cross slide, this was purchased directly from Myford probably about 25 years ago, this was used as an optical bench and when it was no longer required I bought it from them and on closer inspection found that it has a 3mm pitch lead screw and the lead screw handwheel is calibrated 0 - 3 with a total of 15 divisions each sub divided into 10. Our own machine shop could have easily fitted a metric lead screw and split nut but from the quality of the handwheel engraving and the fact that a keyway has been cut for non existent change wheels convinces me that it was a Myford special.

The bed has no serial number, I have since added all the parts required to make it a complete lathe.

John

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

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
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

 

Donate

donate