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Member postings for Stuart Bridger

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

Thread: Options for insulating up and over garage door
13/12/2014 11:39:17

Thanks all , looks like Celotex is the answer then.

Edited By Stuart Bridger on 13/12/2014 11:39:36

13/12/2014 10:05:11

My workshop is an a single garage with a single skin aluminium up and over door. Any ideas for the best way to insulate? I don't want to add too much weight or additional thickness to the door, and it still needs to function. 50mm Celotex seems one option, or perhaps bubble foil secured with battens. Another slightly off the wall solution would be to panel the door with a thin sheet and then fill the gap with expanding foam? Any suggestions would be appreciated.

Thread: 1950's Selecta suds pump wiring - capacitor?
11/10/2014 17:36:14

Are you sure it is a single phase motor?
The connections sound a bit like how you would wire a 3 phase motor to run off single phase using a motor run cap?

Thread: ARC - PayPal and Credit Cards
07/08/2014 12:45:37

While no one like to pay "extra" charges, it does show a transparency on behalf of the vendor about what you are getting and the true cost. Nothing is for free in this world. Charges are generally hidden in the product cost. Use of Credit card costs the vendor, so why not pass the charge on?

Thread: British machine tools
07/08/2014 12:32:41

While I feel the Hi-Fi debate should be confined to Hi-Fi forums, I just had to comment.

Hi-Fi is one area where UK manufacturers still reign, Naim, Michell, SME to name just a few.
I do have a foot in both ME and Hi-Fi camps. I have a reasonable Vinyl and CD/digital system. Good vinyl on a decent system will blow away CD any day. CD was a seriously compromised format. The higher resolution digital downloads are getting much closer. I agree vinyl is not perfect, but it delivers a really enjoyable sound.. As for the comment "I will leave this now as you are obviously convinced that your expensive set up is the bee's knees and who am I to disillusion you?" Anyone who comes around to our house and has a listen on my system is completely blown away by the sound quality. I have also had a very enjoyable day at Naim Audio's HQ in Salisbury where after touring their factory we spent the afternoon listening to music on a £100K system. Outrageous cost - yes( but not the most expensive available), enjoyable - immensely. Would I spend that money, no. But I will spend £20 on new vinyl rather than £10 on a new CD, because it is much more enjoyable. Pure nostalgia absolutely not. I also enjoy the vinyl I bought 30 years ago, still going strong and sound much better with the newer kit I am playing it.

Thread: Lathe Foot Print
07/08/2014 11:52:37

Chipmaster 5' x 2'6" based on their foundation plan. This doesn't allow for the end cover swing, which adds significantly more. I have mine with the tailstock end against the wall and the headstock about 2' 6" out from the wall, so I have some access behind. Chippie electrics are on the back of the headstock and every time I have to retrieve a part/spanner. etc from behind, it is a royal PITA So access needs to be considered.

Thread: Bantam
02/08/2014 20:25:16

A set of Actetal replacement handles for some saucepans did the trick for me

Thread: Stuart D10 Metric Plans
01/08/2014 12:27:30

My Stuart 10V drawing are covered in pencil conversions from fractions to decimal. An annoyance yes, major issue not really. As for metric, don't see the need. I can quite happily work in either metric or imperial. Have to say that I am happier with the latter. I learned metric at School in the '70s only have to learn imperial when I started in the aircraft industry in the '80s.

Thread: Thoughts on "build threads"
29/07/2014 14:11:23

It's interesting to compare this forum, with that associated with Military Modelling (link at the bottom of the page).
I drift over there from time to time for a bit of nostalgia, as it was my primary hobby in my teens. Their forum is completely dominated by build threads. which are completely open. You do sometimes get whole pages of "nice work", etc. but it doesn't seem to detract from the main topic. My personal view would be to leave as is.

Thread: 3 ph motor conversion to VFD, any issues?
12/07/2014 17:06:45

A bit more information on what I did with my Chipmaster.

I stripped out the original control gear, this was not necessary, but I wanted to retain the original lever FWD-OFF-REV control. The Inverter 3 phase outputs were wired directly to to the motor.

The control lever and interlock switches for the covers were wired into the DC control inputs on the VFD.

I was lucky that the Colchester suds pump was dual voltage, so this was re-set for 240V operation and wired into a fused outlet. via a new front mounted switch As it is a low power motor, I added a motor run capacitor to give the 3rd phase. No need to purchase an inverter for such a small motor.

The 29Hz technique I posted above will result in lower torque at higher speeds, but that is not an issue for me in my home workshop scenario.

BTW I retained the mechanical variator and also added a speed control pot to the inverter. this results in coarse and fine speed controls.

Thread: 1/8th BSP male thread "taping" size?
11/07/2014 18:30:58

yep, still got my Zeus from 1980, bought it as an apprentice

Thread: 3 ph motor conversion to VFD, any issues?
11/07/2014 16:06:47

No need to reconfigure the motor.

If you set the inverter base frequency to 29Hz you can run a 440V motor from a 240V VFD.

Colin Gibson @ Inverter Drive Supermarket (no connection other than a satisfied customer) has a good article on this. https://www.inverterdrive.com/HowTo/240V-Supply-to-a-400V-AC-Motor/

I run my Colchester Chipmaster using this technique and it runs fine. Colin was also very helpful in helping me specify the kit required

Stuart

 

Clickable link added.

Edited By John Stevenson on 12/07/2014 00:34:41

Thread: Which is the best parting tool ?
26/06/2014 15:37:11

I use a Glanze indexable parting tool from Chronos. Works a dream. I have also used HSS with no issues.

I would recommend flood coolant. I must admit I have never really worried too much about speed. I have a VFD and tend to ramp up the speed as the cutting diameter reduces, which just "feels" better.


Thread: COLCHESTER STUDENT HEADSTOCK ADJUSTMENT
03/06/2014 13:49:17

I have a chipmaster which was exhibiting similar problems. I can't help with the specifics of the screw jack adjusting arrangements. But the chippy also has four allen bolts holding the headstock down. Getting these loose on a 50 year old lathe was no mean feat, in the end i think I only got three undone. Instead of tapping on the chuck, I just used a rubber mallet gently on the headstock casting, which would eliminate any possible issue with the spindle bearings. It worked fine..

Regards

Stuart

Thread: Small powerful springs
21/05/2014 07:58:14

I have used Entex Stock Springs in the past and had very good service from them. They have nothing anywhere near the spec required though. May be a useful source for others.

Thread: Free sources of materials.?
09/05/2014 09:51:07

I echo Lofty's point on laser printer toner. Horrible stuff, gets everywhere. It will also wreck standard domestic vacuum cleaners as the particles are too small to be caught the filter. The main constituent is carbon black which is of course conductive... That then gets in the motor and bang. Years ago when i worked in IT service we had specialist vacuums for laser printer maintenance.

Thread: British Gunmakers screw threads
04/05/2014 06:55:59

Dave, Very interesting post, I see a lot of the 26 1/3 TPI which is still used on most gun cleaning rods

Stuart

Thread: Another one bites the dust
11/04/2014 17:57:53

Anyone remember Messengers in Guildford? That was a "real" tool shop, I remember as a lad drooling over all the tools in there. They also helped kit out my first toolkit post apprenticehip, many of which are still in toolbox.

Thread: Slitting saw advice
28/02/2014 14:05:15

Bob,

My 10V conrod was my first serious use of a slitting saw.

I may have been over cautious, but I took it VERY gently. Multiple shallow cuts with slow feed worked fine for me.

It did take time,but there were no tears.

Thread: Training
21/11/2013 15:22:19

Very interesting photo. I did an apprenticeship there starting in 1980. There were about 80 in the intake that year. I was one of 20 technician apprentices. There were from memory about 10 on a graduate scheme and the rest were craft level. Us technicians did about 6 months in the training workshop, covering everything from basic fitting, sheet metal work, welding, hand forging, turning and milling. I don't recognise the building although the mills look familiar. The apprentices there have wooden toolboxes where ours were aluminium alloy. I don't recall any surface grinders in the shop and all the lathes were modern Colchester (2000?). We were the first year to be exposed to CNC, writing G code on a Commodore Pet. It was a fantastic training experience. Shame most of these facilities are long gone now. Mine was a 4 year apprenticeship, with day release and evening college.

I'm trying to remember and relearn everything I was taught back then and am working on my first project, a Stuart 10V. Some of it is like riding a bike and some skills are long gone, if they were ever there in the first place

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