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Member postings for Andrew Evans

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

Thread: Tuna Can Blower
22/01/2020 16:23:12

Smells a bit fishy

Thread: Stepper motor and driver supplier recomendations
22/01/2020 15:02:11

Thanks Alistair - I have now completely stripped the lathe, it was so dirty it needed doing. Where did you get your smoothstepper and drivers from?

20/01/2020 10:32:50

Thanks John. I have considered keeping the existing steppers and drives. The lathe has been in storage for at least 15 years and some of the electronics looked a bit dodgy so I have taken it all out and just thought I would get better results with a new, more powerful spindle drive, steppers and drivers. I want to do threading in steel. Previously I converted a Starturn to run with Mach3 using the original motors and it did struggle cutting steel to any depth.

I will look at Zapp

20/01/2020 08:46:23

I am doing a complete rebuild of a Denford Orac - can anyone recomend a good UK based supplier for stuff like quality stepper motors, drivers etc? I was thinking of Gecko drivers and a smooth-stepper interface.

Any advice is welcome. Andy

Thread: Biax Power Scraper
09/01/2020 23:09:50

Why are they so expensive?

Thread: Australian Bush Fires
07/01/2020 18:30:12

no idea why my post was deleted - I didn't quote anyone and made no political point - unlike a previous poster.

Thread: Archiving old data
25/12/2019 23:28:17

It's an interesting and complex topic. I used to work on the multimillion £ Digital Preservation project at the British Library. As part of that we built a system that automatically copied each digital file to 3 remote storage sites, it automatically checked each file on a regular basis to ensure it hadn't changed and if it had changed recovered it from a remote site. Files on hard drives can spontaneously have bits changed and of course there can be bugs and physical problems like fires. We archived digitised books and newspapers as well as websites and other 'born digital' files such as the huge master files for Ordnance Survey maps. When one disk started to fail it was swapped for a new one and data automatically copied over. I am sure that project has evolved since then.

Files stored on older CDs can be unreadable as the surface degrades, generally they are poor way to store data long term.

90% of the data collected during the Apollo program is now unreadable - the data format was never recorded but the data itself is fine.

For files created with a specific program you need to store the program with the file or instructions on how to read the data - no point in having a well preserved file if you have no idea how to read it.

The BBC had a project in 1981 called the Doomesday Project to record census data and general information about life in Britain - the data was stored on Laser Disks. I understand there is only a single, working Laser Disk player in existence now that is capable of reading this and this is used as a classic example if digital obsolescence. So it can be a hardware problem as well as a software one.

Data loss isn't always accidental, governments can try to change data - look how Trotsky was erased from photos after he fell out of favour in the Soviet Union. So a good preservation strategy has to cope with deliberate data tampering as well.

Thread: Why mostly manual cars in UK
04/12/2019 22:45:29

Not sure if there are more autos in Australia compared to Europe. You always pay more to rent an automatic, purely because the rental companies can charge more as some people either can't or won't drive a manual. Think it is even more in the US where most people seem to have never heard of manual transmission.

Thread: Myford Super 7 - paraffin to clean leadscrew question
03/12/2019 08:16:44

Ok boomer smiley

Thread: What's your favorite Dan Gelbart video
28/11/2019 23:57:45

He is a really interesting guy. Stefan Gotteswinter also has some great YouTube videos - he is very focused on commercial work that can be done in a home workshop.

Thread: View on this milling machine please
24/11/2019 19:09:04

I live in York and the machine is local to me I think. If your friend is serious I am happy to take a look at it for him.

24/11/2019 19:08:20

I live in York and the machine is local to me I think. If your friend is serious I am happy to take a look at it for him.

Thread: Rod Stewart's Model Railway
14/11/2019 08:25:03

First Cut Is The Deepest was actually a reference to Rod's experience using a lathe.

Can anyone else work in Rod Stewart song titles or lyrics into model engineering or model railway puns?

Thread: Boxford 280
12/11/2019 13:15:33

Is the leadscrew turning?

Thread: New lathe next week
01/11/2019 18:21:31

Get one

Thread: Tour of my workshop
22/10/2019 09:06:57

Thanks Phil, I am jealous of the amount of space you have. Plenty of room for a big Holbrook or DSG lathe.

Thread: VFD and screwcutting
16/10/2019 17:38:49

I looked at Newton Tesla, then got a 2nd hand Mitsubishi VFD (same as the one used by Newton Tesla), a quality 2nd hand 3 phase motor and a prewired control box off eBay for £30 - saved myself about £200 and got the same result. I had to program the VFD but that is pretty easy once you get the hang of it and read the manual.

If you work out how to program the VFD it then becomes obvious how to wire in extra microswitches and tune it to the speeds that suit your lathe and the work you are doing.

Its a big improvement.

Edited By Andrew Evans on 16/10/2019 17:46:47

Thread: Newall DRO
15/10/2019 08:51:15

Not a Newall or a Bantam, but when I fitted a DRO to my Denford lathe of similar size I had to fabricate brackets out of angle that stick out the back of the cross slide. The included brackets didn't really help. There just isn't enough space otherwise. No problems with the z axis but I had to drill and tap holes in the casting.

It's stating the obvious but I fitted spring washers and used loctite to all fittings as I found vibrations loosened the screws over time and scales lost accuracy as the fixings had some end play.

Thread: Changing internet providers
12/10/2019 23:50:26

Rapidly changing technology and broadband demand means that superfast fibre is going to be needed across the country - a house with a couple of TVs streaming 8K movies, the kids listening to lossless streamed music and playing the latest Playstation game requires a huge amount of data that the old BT copper lines can't support.

12/10/2019 23:49:18

It looks like the Sky email address will continue to work indefinitely - **LINK**. The reason for that is it would cost more in admin costs for Sky to delete it than the fractions of a penny it costs them annually to keep it running.

Do you have an Android mobile phone? If so you will already have a gmail email address. If not it is is easy to create one or a yahoo email address - or there are many other free email providers.

If you do want to change your email address on the various sites you use each site will have a way to easily do that - e.g. on this site it is settings => my account from the top menu bar. Changing your broadband provider shouldn't have any effect on the way you log in to your various websites and forums - your user name and password won't change (even if your user name happens to be your Sky email address it is unimportant if that is still a valid email address or not). In fact you can't change your user name on many sites. e.g. if your email address is old.mart@sky.com and your username on a site is old.mart@sky.com you can change your email address any time you want say to old.mart@gmail.com but your username will always be old.mart@sky.com - they are 2 different pieces of data that just happen to have the same value when they are first created.

What I would do is set up a new gmail / yahoo email address, then create a rule in your Sky email system that forwards on new messages to your gmail address - that way you won't miss any emails. Then stop using the Sky address and gradually update your email address in the various websites you use. At some point you won't get any new messages to your Sky account and you can forget about it.

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