governors

[Jo]

My drawings are copyright Hemingway 1993 but I believe that almost identical drawings are available from all over.

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Last night I realised I had made a mistake the two holes on each link need to be on the same side so first thing this morning I set about correcting them. First I turned four steel plugs the size of the offending holes:


I then silver soldered them in:



They clean up quiet well:



I then proceeded to mill the slots in the larger link. Before taking it to my Hobbymat lathe and milling parallel sections where the tapers will be on both links:



One of my complaints about the hobbymat is that the tool post and cross slide gets in the way when I want to support anything from the tailstock. So I proceeded inside to use the Cowell?s to turn the tapers on the smaller link:



The taper has been hand formed I simply cut the two end diameters, then manually made a number of steps and merged them using a needle file.



I then returned to the hobbymat and set over the top slide and turned the tapers on the larger pair of links:





Next job turn the centres of the two links the correct diameter to fit in the weights:



Now for a bit of filing. I thought you might find my ?fiddly bit vice? interesting. I made this up out of a locking ball join clamp with a toolmakers vice mounted in the socket. The result is a vice that can hold small bits in any orientation you may ever need.



The links are very fragile once the ends are broken so it is important to put a packing piece between the arms when you file or nasty things will happen:



Before filing the larger link it was necessary to bring the 6.35mm square down to a 4.7mm by 6.35 section on the end balls, 4.0 by 6.35 on the arms and 4.7 by 4.7 where the central pivots are:



So tonight two links still together:



And just to check they fit.



I still need to make the pivots, drill the weights and make the last two pairs of links.

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That is it for today, this evening I am off to my Model Engineering Society to see if they are going to run a Rally next year.

Jo

[mklotz]

If you're in the USA it may be simpler to just buy carbon steel balls from Enco.

http://www.use-enco.com/CGI/INPDFF?PMPAGE=804&PMITEM=240-2435

Sizes from 1/8 to one inch.  As you can see, they have them in stainless as well.

[Jo]

  Not much to report today??I had to go  shopping.

I did manage a few minutes so I mounted the weights to the end of the drop links. The drilling was achieved by means of making a drilling guide that fitted over the weight?s collar. This was then used to align the weight for drilling by sticking the drill in the guide and making sure it was vertical. The weights were protected from damage by the vice using some off cuts of a soft drink can .



The links were then split and the tangs shortened as required. Finally the balls have been attached with some very strong loctite.



Jo

[Don1966]

Awesome Jo, I like the way you make it all look so easy. I guess once you have done it some, it becomes second nature. I have an IC project that will require governor control and this is my class room till I get around to build it. 

Don

[Jo]

Thanks Don: I am pleased someone is still following along and finding it useful.

Next job is those thin links. I have been having a little rethink and am going to try a different way than normal

Jo

[fcheslop]

Sorry for not speaking up I'm kinda shy Definitely watching and learning

[Captain Jerry]

Thanks Don: I am pleased someone is still following along and finding it useful.

Jo

You are doing good work, Jo.  Lots of people watching.  I was watching to see how you were going to get the barrel shaped pivot at the mid point on those arms. Oh, like that! Note taken. 

Jerry

[steamer]

Oh I'm writing it down as it comes Jo.....

Dave

[zeeprogrammer]

I'm another someone!
I've been reading every post.

[Pete49]

and me too  Learning quite a lot from this.
Pete

[smfr]

Yep, I'm reading every one! Keep going, Jo!

Simon

[Maryak]

You've got my attention  ................(difficult to write when your reading )

Best Regards
Bob

[ProdEng]

I am watching and learning   Looking at the end product I would have tried an improbable method but now know better

[Jo]

The spindly links , I started off this thread by mentioning that we were going to do them enblock, this is how. These are our links:



We start with two blocks their top surface must be larger than the size of the link and we co-coordinate drill for the link holes:



We now mill the two flats on either side of our block for the shaft of the link:



Which gives us these:



Now using a slitting saw we cut slices the thickness of our link :



Giving us lots of links, these are then rubbed on emery to get rid of the cutting marks.



We now knock up some filing buttons. For the larger links I files the ends in pairs, for the thin ones I did all four at once:



This gives us these :



Next job is the pivots, then I will show you what they look like once they are put together. Then the job takes a turn for the worse.. painting

Jo

[ScroungerLee]

I too am following along.  Originally I pulled up a chair, but had to get up for a minute.  When I got back Zee was sitting there.  I will just sit on the floor taking notes

Lee