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General Crafts / Re: Regulator Clock
« Last post by smiffy on Today at 05:07:05 PM »
I can not remember how my ITR works as it is atleast 20 years since I had it running .  I will have a look tomorrow .

My favorite electric master is the GPO type 36 ,its almost silent in operation I have one in the house driving a Pul-syn-etic
slave  I did set a Gents C7 up in the house but far too noisy , it was ok during the day but the noise of it resetting every 30 seconds at night would drive you mad .

I am just learning about cnc . and am learning Arduino  and building a 4th axis the same as Myford boy on u tube but most of the time I find it really quick to use direct division

I also have a Boley lathe on the same lines as the Leinen but larger and with screw cutting and power feeds etc
The other clock are a TN german make clock a Brille french made clock and a Gents C7
General Crafts / Re: Regulator Clock
« Last post by philf on Today at 12:22:42 PM »
I must have had the ITR and the Synchronome for 20 years or more.

The works ITR is wound by a 1rpm synchronous motor with an eccentric. The ITR (or IBM) I acquired last year is wound once a minute with a solenoid so is quite noisy. I have thought of experimenting with a damper to quieten it down but in the workshop it doesn't matter. I have a number of slaves for the ITR but have only recently got one for the Synchronome.

I have the baby brother of your Leinen a WW82 watchmaker's.

I've cut  pinions on my mill with a dividing head. When I get round to cutting wheels I'll do it on my CNC mill with a 4th axis. Unfortunately the CNC spindle won't run slowly enough for cutting pinions with a carbon steel cutter.

My works ITR has a mercury tilt relay for driving slaves. I have several spares.

Project Logs / Re: Oxy-Acetylene Storage Cage
« Last post by BillTodd on Today at 10:44:36 AM »

. . . .the finish still looks atrocious !

War finish !

New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 08:56:56 AM »
Well I did revert to the phases the other way round - still kaput as you might expect.

Intriguingly two phases are drawing about 90 amps before the breaker trips, and the third phase is drawing no current  :scratch:

I think that it's 'proper sick' - shame it's a sealed unit like a normal 'fridge one (but on steroids!)
New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 07:44:01 AM »
John it's all up in the air at the moment - it sounds as though the motor itself has blown up and of course they are a sealed unit.

I >MAY< try reverting to the reversed phases briefly as it was working then ! But at the moment I'm giving it a wide berth !
Project Logs / Re: Oxy-Acetylene Storage Cage
« Last post by awemawson on Today at 07:41:21 AM »
Hasp and Staple arrived today, so they got cut to size and fitted.
New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by John Rudd on Today at 06:03:51 AM »
Oh Dear!...This is not good....Yet you've come so far...

Is it worth getting your compressor 'fettled' ? versus the price of a replacement of dubious quality? Do you know anyone in the refrig game that could connect and regas as a home job?

Here's hoping you can rescue it... :dremel:
New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 05:49:15 AM »
So some good news and some rather bad news :(

I filled the tank - no leaks and all seemed well. I spun the pump by hand by means of its cooling fan - still OK.

Then I applied 3 phase to the machine - sure enough pump running, and the controller showing current water temp - the main cooling  fan then started and I noticed that it was spinning the wrong way - warm air should exhaust at the top, and be drawn through filters at the sides, but it was going the other way. Checking the Grundfos pump, it too was spinning the wrong way so obviously a phase reversal. But by this time the cooler had  reduced the water temperature to 5 degrees.

So I reversed two phases and now pump  and big fan now spinning the correct way - the compressor however made a funny noise and tripped its breaker  :bang:

It does look at the moment that the compressor has died, and this could be terminal for the entire project due to cost. I've walked away from it to allow my head to clear - a quick look on eBay reveals a few similar but not identical compressors starting at 250 but even if I got one I'd need it to be installed and re-gassed. Installation would be far from easy as it is tucked away in a cramped space.

. . . . . one step forwards . . . five backwards  :bang:

As I filled the tank the float for the water top up inlet valve, that I had noticed was on the base of the tank, floated up and I ws able to recover it - it looks as though it should just snap back into place but that's the least of my problems at the moment.

Project Logs / Re: Extending the soundscape of a hexaphonic guitar pickup
« Last post by sorveltaja on April 01, 2020, 06:51:36 PM »
Today I got an idea of using 4017(decade counter) as a simpler, single chip alternative to 4051-4040 based waveform generator, as its outputs are sequenced similar way.

It doesn't need a counter chip to do the sequencing, so I breadboarded it, and it worked... sort of. It made stepped waveforms, but when adjusting one step up, others moved around.
I guess its outputs needs to be buffered before they go to the potentiometers, or something like that. Overly simple idea wasn't so simple anymore.

Next I'll be drawing pcb for the 4017-4046 freq. multiplier, and 4051-4040, which so far seem to work, as expected. I ordered 60mm linear slide pots, and the plan is to stack the pcb under them.
There should be plenty of room for other possible circuits also, like filters and such, but we'll see.

To get back to that previously mentioned 'variable' capacitor board, I had this in my mind, where caps could be added one by one, in parallel(to add capacitance).

But naah, I can't figure out, how to do it that way. Then on to the net to see, what kind of devices are available. Decade resistor boxes, also some capacitor ones, but not really anything dirt and cheap enough for diy purposes.

Actually, just minutes ago, when writing this, this half-baked idea popped out of thin air:

So then I thought: hmm, why not use 45 caps instead of 9, to make steps from 0 to 90nf ?

Using the same pattern, first select hundreds, then tens, and then ones, if needed. Three 10-step rotary switches for that perhaps. Definitely not as pocket friendly, as the potentiometers are.
135 caps for the range from 1 to 999nf. Plus three rotary switches. Plus I have no clue, does it work in practice.

Price of the components shouldn't be too prohibitive, if the aim is to use that contraption for lo-fi audio, or other such things.

I have one old rotary switch somewhere, if memory serves. If I manage to find it, I'll do some testings with say, 6 cap sets, using probably other switches too.

General Crafts / Re: Regulator Clock
« Last post by smiffy on April 01, 2020, 05:23:38 PM »
I need  acquire some oak before I start the case .I do have some very nice unmachined chestnut but think oak would be better

The ITR is a bit boxed in at the moment but I will have a move around so that I can get to it . I unearthed another clock that I had forgotten  about .Its a National Time Recorder .

This is a electrically  rewound spring driven clock . as the spring runs down it tilts a mercury switch which energises a solenoid which rewinds the spring

I also took some pictures of the Leinen  lathe set up for gear cutting

philf that sounds interesting about your ITR . How long ago was it that you acquired the parts ?
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