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Member postings for Martin Kyte

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

Thread: four way toolpost with ratchet
27/01/2022 22:12:52

It certainly looks like a Myford 4 way indexing tool post.

regards Martin

Note to self, dig out my old one and measure the dimensions of the square.

Edited By Martin Kyte on 27/01/2022 22:14:03

Thread: Is it possible to by "100% non-stick" spatulas for spreading glue? (ideally made from teflon/FEP)
25/01/2022 08:44:20

The main requirements are that the spatula should be flexible and very smooth. The peel strength of most glue is fairly low so with a flexible spatula the spatula can be peeled off the glue.

regards Martin

Thread: New highway code rule.
24/01/2022 13:59:29

As an ex motorcyclist it took me forever to stop looking over my shoulder when pulling out instead of checking mirrors. Cycle lanes make me chuckle. The ones outside the Lab (both sides of the road) are used by cyclists travelling in either direction. So you can have two cyclists approaching each other on the same cyclepath. Usually one either pulls over onto the road or the pavement. It make it interesting leaving the Lab car park as you not only have to check for road traffic but for cyclists travelling either way on the bit of cycleway you are about to cross. But then it is Cambridge and we are reasonably close to the language school.

regards Martin

Edited By Martin Kyte on 24/01/2022 13:59:59

Edited By Martin Kyte on 24/01/2022 14:00:28

Thread: Wire wicks
20/01/2022 13:13:56

Do wire wicks entrain grit ?

regards Martin

18/01/2022 10:50:31

The main reason for using wicks is they deliver oil and leave the grit behind.

regards Martin

Thread: What Did you do Today 2022
15/01/2022 18:17:14

As Bees pop up from time to time on here I thought you may be interested in this thermal image of one of the hives at the Lab. (Kept purely for enjoyment at honey)

bees.jpg

Thread: Are standard "M4" nuts & bolts normally fine or course pitch?
13/01/2022 11:55:11

Coarse

regards Martin

Thread: Engineering as Art
12/01/2022 12:47:36
Posted by Michael Gilligan on 12/01/2022 12:02:57:
Posted by Martin Kyte on 12/01/2022 11:56:31:

I do hope you realise I am just repeating the story. The intresting point was the tracer worked as she always had.

[...]

However [...] so I'm not sure I entirely believe you Michael.

.

(a) Understood

(b) That is entirely your choice, Martin

.

MichaelG.

.

Edited By Michael Gilligan on 12/01/2022 12:07:23

I meant that that may be the case sometimes, but our system certainly operated sequentially maybe VuTrax had it's own plotter driver built in. I have no idea what my friends system used.

regards Martin

12/01/2022 11:56:31

I do hope you realise I am just repeating the story. The intresting point was the tracer worked as she always had.

However our own plotter used for plotting PCB transparencies did follow the input file including redrawing lines where there were two lines between two points. That used to gum up the pens something chronic, so I'm not sure I entirely believe you Michael.

regards Martin

12/01/2022 10:20:39

I would have some of the classic draughted pencil drawings from old engineering books on my wall. Inddeed some old books have pages missing where this has actually been done. Grimthorpe's treatise on Clocks Bells and Watches is a point in case. It is supposed to have a fold out drawing of the Westminster Clock (aka Big Ben,yes I know it's really the bell) but in most copies this has been removed and sold separately.

Not sure I would want any of the CAD drawings on the wall even the 3 D renderings.

On a slightly different track a friend had an interesting story back to the period where their company was transitioning from drwing boards to CAD. The employed a lady who had been a tracer to digitise the old drawings. Essentially clicking on the ends of lines etc and generating computer input. For printout they used an HP pen plotter which could do A0 sheets by moving the pens in the X direction and rolling the drawing sheet in and out to generate the Y axis. When the printed any of the newly digitised drawings it took an age as the plotter spent all its time drawing a bit and then moving to the other corner of the sheet and doing a bit there and so on. Things were plotted in the order of input. When she was asked why she had done thing in this way instead of systematically moving from the top to the bottom in one pass, she said that as a tracer, you had to do a bit and then do somewhere else whilst the ink dried otherwise you got smudges. That was the was she always did it then, so she just carried on the same when doing the digitising.

regards Martin

 

Edited By Martin Kyte on 12/01/2022 10:22:23

Thread: Wind powered machine faster than the wind
10/01/2022 11:17:14
Posted by pgk pgk on 10/01/2022 10:34:30:

But this machine can go downwind? faster than the wind as opposed to only doing so with a side-wind component. can any of ice yachts and hydrofoils go directly into wind?

The method used does suggest that a boat might do so with a rotating sail connected to a subsurface propellor.

Do you really mean downwind. The land yacht travels into the wind and the clip is captioned upwind.

regards Martin

Thread: drill sharpening jig or dedicated tool
08/01/2022 17:38:02

Under 6mm regard as disposable. I have several sets of drills. a best set (well 2 actually steel and brass). As drills get blunt they are relogated to the DIY category and are also fodder for regrind specials for plastics etc. If you don't have a cast off set you will end up using your good drills for iffy jobs, like using them in battery drills where they will never run true again.

regards Martin

Thread: Building a Minnie
08/01/2022 11:36:05
Posted by Nick Welburn on 08/01/2022 09:59:55:

Are my ambitions outstripping my ambilities or is this an achievable goal after my experience so far?

I don't think so (re ambitions). It depends a little on how you like to work but there is no compulsion to employ a step wise approach to what you build. I started out , after building a simple weight driven clock, to build a 5 inch GWR King as a first loco. My logic was that was what I wanted and to build something simpler would leave me with a loco I did not really want and take a deal of time to build. I had already realised that the King was to be a very long term project and that skills would be obtained along the way by making various workshop tools and equipment.

I would say go for the Minnie and if you get to bits that are new to you such as cutting gears take some time out and build something else like the George Thomas geared bending rolls. Gives you the practice on the gears, makes a break from the Minnie and you wind up with a usefull piece of workshop kit which can roll your boiler cladding for you.

Hope these comments help.

regards Martin

PS I still haven't finished the King but as I'm now part retired things are speeding up.

Edited By Martin Kyte on 08/01/2022 11:37:34

Thread: DAB radio
30/12/2021 13:30:54

Long Wave works for me.

Martin

Thread: Can you identify these hand tools?
23/12/2021 10:43:10
Posted by Michael Gilligan on 23/12/2021 09:02:09:

Posted by Martin Kyte on 23/12/2021 08:27:04:

.

Glazing Iron or Glass Hammer?

.

Is this just more ‘seasonal silliness’ ?

… or didn’t you see the post by Matt S in the thread that I linked ?

… or the set of photos which followed it ?

MichaelG.

.

[quote] Current production: **LINK**

Edited By Michael Gilligan on 23/12/2021 09:13:51

To be honest Michael no I didn't mainly because I beleived you to be correct in calling it a Glazing Iron. My old woodworking teacher used to call Glazing Irons Glass Hammers which came to mind when making the point about 'Ruler' or "rule". A rose by any other name should smell so sweet etc.

regards Martin

23/12/2021 08:27:04
Posted by James Hall 3 on 22/12/2021 23:42:48:

The one at the bottom is quite common and is used for measuring lengths or as an aid to drawing a straight line; often referred to as a ruler.

 

Or if you wish to be pedantic a rule.

Glazing Iron or Glass Hammer?

;0)

Happy Christmas

Edited By Martin Kyte on 23/12/2021 08:28:07

Thread: DRO's and mental agility
22/12/2021 11:59:45

Definite huge advantages on the X and Y of the mill. Much less so everywhere else including the lathe. I think you will get enough 'brain training' just being in the workshop solving problems, mental arithmetic is a very narrow train of thought. Remembering all the tapping drill sizes and fractional to decimal conversions is enough to keep you awake.

regards Martin

Thread: Rivetting
18/12/2021 19:05:24

You could make a George Thomas Pillar tool which will hold the punches for you, see Hemmingway kits or Georges Book for details. Or you could make a rivetting pliers in the form of a hand held toogle press.

regards Martin

Thread: Floor Paint
18/12/2021 17:19:36

Our Lab mechanical workshop has solid oak flooring and it looks magnificent.

regards Martin

Thread: Drilling brass.
14/12/2021 13:59:18
Posted by MadMike on 14/12/2021 13:20:00:

As usual lots of good advice but sadly mainly of the "stone" the edge variety to "blunt" the drill

I have seen reference to Rake and suggestions that you can alter this easily. Rake is the angle of the spiral relative to the cutting edge. For brass this can be an important factor. Slow helix/spiral drills have the rake required for drilling brass. Modifying the point by stoning or honing simply alters cutting edge clearance which is not the same as rake on a spiral drill.

You have clearly not understood the process, or so it seems. The material is removed from the face of the drill (inside the flute) which alters the rake. As I said I use a diamond credit card slip to achieve this and obtain a sharp drill with the same rake as a straight flute brass drill. I do agree with you that blunting the drill doesn't really get you where you want to go. I also agree that brass drills and slow spiral drills designed to cut these materials are the ideal. For my clockmaking though which is generally dealing with holes below 6mm I have a set of drills modified for brass as I have described and as they work well for me is cheaper than buying a complete set of specials.

regards Martin

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