Member postings for Jens Eirik Skogstad

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Edited By Jens Eirik Skogstad on 27/10/2017 10:56:32

These photo where i took inspection of worned escape wheel under microscope.The teeth on escape wheel is curved instead of straight teeth where the pallets are on contact. Some time the teeth is pressing the palett out of rest position ("in lock" position) and fluttering 6-8 teeth past the pallets periodically. (Escape wheel passes some teeth through the escapement) The Pallets seem ok.

Edited By Jens Eirik Skogstad on 27/10/2017 10:56:13

Edited By Jens Eirik Skogstad on 27/10/2017 10:58:06

Kevin,.. you can download the program for calculating the change gear if pitch of the lead screw and a set of change gear is known and the threading size is selected to create threads.

Go to this link --> **LINK** and download the program --> NthreadsP

and if your lathe has a screwcutting gearbox ---> BoxfthreadP

I has checked all parts in escapement, learned out the escape wheel is worned. Also not sharp pointly teeth. I can se the teeth on escape wheel is curved instead of straight teeth where the pallets are on contact. Some time the teeth is pressing the palett out of rest position ("in lock" position) and fluttering 6-8 teeth past the pallets periodically.

Then a question: Is it dificult to make a new escape wheel? Have someone a tips or to tell how to create the escape wheel?

Sad John has passed away. Condolences to his wife and family. Rest in peace.

The torsion pendulum is set to correct, swing in same way in each side, and the clock is in vertical.

The clockwork is cleaned. But i has a mistake: Is the escapement out of order (The pallets is adjustable) or need recentered the ancor in distance to escapement wheel? I can see there is a excenter adjusting for centering between ancor and escapement wheel.

The pallet hit first at the top of tooth, not into the wheel tooth before the tooth is stopped on pallet. The other pallet is ok.

Hi folks.. I has a old Gustav Becker 400 days clock serial number 4444. There is problem with escapement where the pallet hit the top of escapement wheel.

Is it the solution to fix the problem?

See this in youtube --> https://www.youtube.com/watch?v=AZ0j08_ddmI

No access to website? Go to this here ---> **LINK**

Timing incorrectly set?

Edited By Jens Eirik Skogstad on 21/10/2017 09:07:26

Best wishes to John Stevenson. The first time I became familiar with this name John Stevenson when I searched for "how to create gear wheel cutter" in the internet. He is an inspiring teacher for younger generations in model engineer. Read many great tips he had written in the forum.

It is a matter of how strong the gearwheel are in large diameter, considering centrifugal forces at high speeds before the gearwheel sprouts into pieces. Think it's unrealistic.

Hi folks!

I created the gas stop valve and gas attenuator.

But the problem is teflon/PTFE sheet is noe easy to buy in Norway.

Can i use the thin silicone sheet as diaphragm cut from the silicone form for baking who is sold by kitchen shop?

The silicone seem soft and strong material and can withstand up to 250 degree Celsius/482 degree Fahrenheit.

Or must it be teflon/PTFE sheet as diaphragm?

Edited By Jens Eirik Skogstad on 07/04/2017 17:33:48

Better to make feeding pump self starting who is affected by a shuttle valve and a main valve without crankshaft and flywheel. In case crankpin is in tdc or bdc, this is impossible to self start feeding pump. The working piston diameter must be larger than feeding pump diameter to example 10 mm diameter working piston --> 6 mm feeding pump diameter. It will give high pressure to pump feeding water into the boiler.

Compression ratio in the semidiesel is not high compared with the real diesel engine. Compression ratio in the semi diesel engine is difference depending on size of hot bulb to example a big hot bulb in a low compression ratio 8:1 while the small hot bulb need high compression ratio up to 12:1. The injector is not a high pressure injector to atomize fuel. Under idling the fuel is hitting on hot bulb to ignite fuel and under full load, the fuel is direct injected into cylinder ignited by heat of compression. The injector is adjustable from thin fuel jet under load to atomized fuel under idling. The regulator can be vacuum regulated (Rap, Sabb semidiesel), stroke regulator (Wichman semidiesel) or centrifugal regulator to regulate amount of fuel depenting on speed of engine.

You can use the program to calculate size of threads and set up change gear wheels --> **LINK**

Or use aluminium as here --> **LINK**

You can produce the diaphragm of aluminium sheet formed on spinning tools at lathe. I am not sure how thick it will be. It must be audible from grammophone.

Mica sheet ---> **LINK**

Johs- Line 1, when you wrote about angle of needle on soundbox, then i googled and found the information about adjusting of the tone arm tracking and angle of needle. Here is the link --> http://www.graham-ophones.co.uk/keeping-on-track/4590882209

(Det ville være hyggelig å møte deg, men jeg er faktisk døv mann med interesse for modellingeniør og i tillegg har hatt utdannelse i maskin og mek. Jobber som bilmekaniker og EU kontrollør hos Bertel O. Steen Bergen AS )

Edited By Jens Eirik Skogstad on 29/12/2016 23:04:41

78rpm records are made of a hard material which will wear any needle in contact with their surface. If the needle is as hard (or harder) than the record, the record will wear as well. If the needle is softer than the record, the majority (or all) of the wear will be to the needle. Needles can, and must be, replaced, but records can't be. So to preserve one's precious recordings it is important that record wear is kept to a minimum, or even better to reduce it to zero.