Member postings for Brian Oldford

Why not a GX16 type plug and socket. Often used for microphones and ham and CB transceivers.

IIRC the cut-out in the bed is larger to accommodate the bevel gear that rides in the keyway. Myford may have rationalised the beds of the later PCF and non-PCF machines.

I would have thought by now you would have reverse engineered the PCB and published a full schematic by now so we could opine further.

Get well soon. Wentworth needs guys with your skill-sets.

Why on earth would you want not to take advantage of the infinitely variable speed that a VFD provides when wired in the usual manner?

Now I've looked at those budget controllers I concur with SOD. Without getting them on the bench and having a poke around at the circuitry to find out exactly how the pots are connected into the gubbins it might be better to stick to two pots on a common shaft.

As these controllers are PWM devices I'm sure it could be done in the way I suggested with an Arduino but it would take a little R&D to avoid letting out any of the blue smoke.

If you need better "balance" you might consider using a couple of PWM ports on an Arduino. With care I would think you should be able to get sub 1% balance.and a whole heap more functionality should you need it.

Although some of the contributors may be.

If you need seperate switches and can only find a pot with a single switch you could slave a two pole relay off the switch.

Just one step above the lever scroll 3 jaw that my kit built Flexispeed Meteor II had about 50 years ago.

Whilst seemingly a very elegant solution for its simplicity , For "awkward" divisions won't that encounter the problem of cumulative error mentioned upthread?

The material in the spirit carrier would have been what's known in some foundries as plumbago.

It leaves a coating of graphite on the mould cavity which helps bind the surface of the sand mould and impart an improved finish to the casting. It acts as a binder to the sand and significantly reduces any erosion to the sand as the iron is flowing into the mould cavity.

Is the tool flexing?

Try 1:35 onwards at **LINK**

Then onto an ML7 at 2:15

Edited By Brian Oldford on 30/05/2019 21:25:06

It's called the "Mushroom Technique" - kept in the dark and fed on bovine excrement.

So long as you don't glow in the dark we'll assume you're OK.

Are you intending taking on the clock once you've sorted the doors?

How about one from the Potteries. A Saggar Maker's Bottom Knocker.

https://www.youtube.com/watch?v=f5jYFzUBRHw

Edited By Brian Oldford on 24/05/2019 19:45:39

**LINK**

One small word of caution should you choose to go down the lost-wax (investment) route is the phenomena of "double-contraction".

Not only will the final brass casting contract within the mould after reaching solidus the wax model before will also shrink as it freezes within the rubber mould taken as a "squeeze" off any original.

Edited By Brian Oldford on 22/05/2019 07:48:25