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'Living with an old Synchro' and other tales from my shed.

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DavidA:
A few quick pictures. Taken with a hand held camera, so not good quality. Things will improve when I get the tripod adapter sorted out.

I'll save the descriptions for the next (better) pics.

But basically,  the gear train as it is in normal (low range) usage.

 then the machine. Sans guards. The big lumpy thing in the middle is the EMCO milling head.

And a rather reflective view of the Imperial screw cutting chart.

Let's see if they appear.

Dave.

awemawson:
Nothing shabby about those pictures Dave  :thumbup:

DavidA:
As this thread covers whatever is going on in the shed I thought I would mention my way of setting up a four jaw chuck.

I watched John Mills method in one of his posts, and it works pretty well. I do notice that he doesn't always follow this procedure, and the boring of the pulley for the drill shows the way most people tend to do it. Again, it works. But it can take a lot of moves to get right.

Here is what I do.

First, set the clock guage on the far side of the job, at centre height (this is important).

Move one of the jaws (say Number one) to a position at the operator side and horizontal.

Set the guage to zero.

Rotate chuck half a turn. Note reading. Use keys to take out half the reading.

Rotate chuck another half turn, Number one will now be back on your side. reset zero.

Rotate half a turn and you should be pretty close to zero in that plane.

Rotate chuck 90 degree (quarter turn) and repeat the procedure as for the first pair of jaws.

The thinking behind this is that there really is only movement in two axis. horizontal and vertical.

If your job is off centre (and you ignore the jaws for a moment) all you need do is move the job across and up/down to find the centre.

So you only need to move the job in two directions. By setting the jaws horizontal you achieve this with the minimum moves as opposed to what happens when the job high point comes high at some odd angle and the jaws are not horizontal/vertical.

Like most things, this takes much less time to actually do than it does to describe.

Try it.

Dave.

Pete.:
I'm about to strip my headstock down as it's started making some godawful noise and the hi-low lever is visibly knocking. I'm hoping it's something simple like a loose hub screw.

DavidA:
Pete,

Does it do it when the hi-lo lever is in neutral ?

And what kind of condition is the variable speed belt in ?

Dave.

p.s.  Re the oil level.

According to the Denford site, the 280 Synchro headstock holds one Pint of oil.

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