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

Member postings for Gary Wooding

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

Thread: Total newbe
06/04/2014 19:09:57
Posted by Bazyle on 06/04/2014 18:52:31:Note that most older 3 phase motors are not dual voltage. You therefore need a more expensive 440v output inverter not the more regular 240 ones you can use when the motor is switched to delta. People will tell you that you can find the star point in an old motor and rewire it for delta but in old motors that point is burried in fragile insulation so digging kills the motor.

No it doesn't. I've done two and they're going strong 6 years later.

Gary

Thread: Imperial fractions on drawings.
06/04/2014 17:53:31
Posted by MICHAEL WILLIAMS on 03/04/2014 19:27:05:

Errors are certainly still possible but the general experience is that most errors get spotted 'pictorially'- without having to consider dimension details at all in some cases .

Hard to actually prove but as far as I am concerned design using a 3D CAD solid model is intrinsically more sound and less error prone than using 2D multiple flat view methods .
 

Basically true, but errors can still occur.

A few years ago, I was a member of a small team who had to design and build a special wheelchair. One member, who was very experienced with Autocad, accepted the job of creating the drawings. We should have heeded the warning signals when the first drawings appeared with dimensions in 1/10000", but we continued until one day we got a drawing where two important parts simply wouldn't fit. A dimension was exactly 1" out, to 1/10000"!. He had committed the cardinal sin of modifying a part without updating the dimensions.

Gary

Edited By Gary Wooding on 06/04/2014 17:55:00

Thread: Wire stripper repair or bin?
05/04/2014 14:32:35

I've repaired a few unsolderable things in the past by sewing them with 0.5mm stainless steel wire.

I use super glue to hold the parts together, drill small holes to take the wire, then use the wire to stitch it together. After the wire is pulled tight I then smother it in super glue. It works pretty well - not pretty, but serviceable.

Gary

Thread: Quick Acting Knob Question
05/04/2014 13:00:33

I've created a PDF of the section of the article that tells how I made the tilt nuts **HERE**

I hope this answers your query.

 

Gary

Edited By Gary Wooding on 05/04/2014 13:01:23

Thread: Imperial fractions on drawings.
03/04/2014 08:35:13

If anybody is interested, some years ago I constructed a conversion chart for members of my ME club. It's in the form of a 2-page PDF that can be downloaded from...

**LINK**

It has the decimal and metric values of all Imperial fractions in 1/64"s up to 1", and tapping drill sizes for the common threads.

The tapping drill sizes were calculated with a 65% engagement for diameters up to about 3/8" or 9.5mm, and 75% for larger.

You can print it any size you like - I keep laminated A6 double sided versions near my computer desk and in the workshop.

Thread: end mill speeds
30/03/2014 14:33:49

You might find this useful. There is also an Android version.
**LINK**

Thread: Lathe facing convex or concave
25/03/2014 08:15:04

This explains it.

Gary

concaveerr.jpg

25/03/2014 07:41:20

.

 

Edited By Gary Wooding on 25/03/2014 07:56:48

Edited By Gary Wooding on 25/03/2014 07:57:57

24/03/2014 15:53:46
Posted by Nobby on 24/03/2014 10:18:53:

HI Niko & Guys
If you faced a large Diameter using cross slide . and it faced a slight angle . running a dti across the face using
the same cross slide. surly it would follow the same path ie zero . ?
Nobby

Quite so, if you only went to the centre; but if you went right across the face, the DTI would register twice the error when you reached the other side.

Gary

22/03/2014 12:23:16

There is no argument about the requirement for a lathe to face perfectly flat. The real question is, given that perfection can never really be obtained, is it best to deviate slightly by turning concave or convex? My vote is concave.

Gary

Thread: Browsing Photo Albums
21/03/2014 09:33:13

Thank you.

Thread: Column Alignment with Tilting Head Type Mills
21/03/2014 09:30:17

It seems to me that your problem is illustrated in diagram A below. Your DTI method will align the spindle with the column, as in B. Then, by normal the tramming method, you will tilt the column until the spindle is vertical, as in C.

Not knowing the mill, I don't know how you will tilt the column, but the method is sound.

tramcol.jpgGary

Thread: Browsing Photo Albums
21/03/2014 07:45:07

You were right, it was Adblock. I must remember to switch it off next time I look at an album.

By the way, is the massive list of all albums in any particular sequence? It appears to be random to me.

Gary

20/03/2014 14:30:48

I think, maybe, that this is another Firefox incompatibility feature: I see no arrows at all. I've tried pressing Ctl-A to see all controls, but there are no arrows or buttons visible at all.

For what browsers does it actually work?

Or perhaps there is another method of looking at albums, other than clicking the Albums button at the top of the screen,

Gary

20/03/2014 11:26:55

Is there a way to view consecutive photos in an album without the need to go back to the thumbnails in order to choose the next one? In other words, is there a "Next" , or "Prev" button that I haven't found?

Gary

Thread: A coping saw for metal
20/03/2014 07:27:13

"Nose grease" also works well - you simply wipe your finger and thumb down the side of your nose, where it meets your cheeks, then wipe the same finger and thumb along the saw blade. You can misplace a candle, but your nose is always handy.

Gary

19/03/2014 09:31:10

If you want to saw intricate shapes in metal, there is really no substitute for piercing.

The photo shows the offcuts from a job, one offcut is 0.8mm brass sheet and the other is 3.0mm stainless steel sheet, both were cut using a 6/0 piercing blade - that's .007" thick and .014" deep.

Sizes of piercing saw blades can be found HERE

pierced items.jpg

Gary

18/03/2014 07:51:54

What you want is a Piercing Saw. They are are not very expensive, and the blades are remarkably cheap. If you've never used one before, be prepared to break lots of blades. Here's a place you can get them *LINK*

Thread: New Lathe leveling
24/02/2014 11:41:43

Yak,

It's not necessary to level both ends of the lathe - it's sufficient to adjust one end (choose the easiest) so that it matches the other. A lathe doesn't need to be actually level - lathes on ships can't be level, but they work OK because they have no twist in the bed.

If the headstock end is the most difficult to adjust, run the carriage up the headstock and place the level on it. Move the carriage towards the tailstock and watch the level. If it moves more than you like, adjust the tailstock end to compensate. When the bubble movement is acceptable, tighten the bolts and check again. If it's still OK, you're done. You're not seeking to level the bubble, you're only trying to make it the same all along the bed.

Thread: Problem saving as pdf in Turbocad
24/02/2014 07:08:55

This is a well known problem with TCs PDF facility, the solution is to instal a separate PDF writer. The one I use is called PrimoPDF. It's free and instals as a virtual printer; it works for any program that can print.

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

Latest Forum Posts
Support Our Partners
ChesterUK
cowells
Ausee.com.au
Eccentric July 5 2018
Warco
emcomachinetools
Allendale Electronics
Eccentric Engineering
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