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Krenov lamp

This is where we don't want anything but evidence of your finest wood butchering in all its glorious, and photograph laden glory. Bring your finished products or WIP's, we love them all, so long as there's pictures, and plenty of 'em!

Re: Krenov lamp

Postby TrimTheKing » 04 Jan 2021, 17:32

Rezi wrote:Still on the subject of the cable - how do you intend to get it past the swivel joint?


Look two posts above yours. ;)
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Re: Krenov lamp

Postby Andyp » 04 Jan 2021, 18:02

If a rechargeable lightbulb were to be used then there would no need for any cables.
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Re: Krenov lamp

Postby 9fingers » 04 Jan 2021, 18:04

Do you have any examples of a suitable rechargeable light bulb Andy?

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Re: Krenov lamp

Postby Andyp » 04 Jan 2021, 18:07

cheers

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Re: Krenov lamp

Postby 9fingers » 04 Jan 2021, 18:13

Ah ok not seen that before. I was wondering where the batteries could be hidden

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Re: Krenov lamp

Postby Andyp » 04 Jan 2021, 18:22

Might need two of course. One always fully charged, but then it can also be used in the garden, camping etc..
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Re: Krenov lamp

Postby Steve Maskery » 04 Jan 2021, 18:24

The swivel joint will be hollow, like this:

swivel joint.jpg
(43.55 KiB)


JPG this time! :)
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Re: Krenov lamp

Postby Chris101 » 04 Jan 2021, 18:32

Andyp wrote:Is 60w 5000 lumens enough?

https://www.amazon.co.uk/LETOUR-Recharg ... XE649JFDKY


Ooh. I like the idea of that. Thanks for sharing Andy. Not seen those before.
Steve, really interesting project, I can't help so remain quiet but watching in the wings.
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Re: Krenov lamp

Postby Steve Maskery » 04 Jan 2021, 18:33

That rechargeable one would save me a lot of work, but it's not exactly pretty, is it? I've bought (a couple of years ago) a very large bulb from Aldi, I think. It's this one, but it was nowhere near that price in Aldi.
https://www.amazon.co.uk/CrystaLite-Ant ... B077DG83JH
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Re: Krenov lamp

Postby MY63 » 04 Jan 2021, 18:56

Would it be possible to use two (stainless) tubes one sleeved over the other, the larger one fixed into the base with a bearing around it, or a bearing surface around it. The cable could run up the centre.
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Re: Krenov lamp

Postby novocaine » 04 Jan 2021, 19:33

Your going to want to stop it moving axial Steve. Even if it's just peening over the bottom of the tube although id rather have a press fit collar.
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Re: Krenov lamp

Postby chataigner » 04 Jan 2021, 20:45

Splendid project, I look forward to seeing more progress.
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Re: Krenov lamp

Postby RogerM » 05 Jan 2021, 14:55

Mike G wrote:Glue it up, Steve, then tuck it under your arm and bring it into the house. My wife is well trained to accept the occasional compromise like that in order to benefit from the stuff the workshop turns out. Or, if you glue up in the morning you should be able to bring it in in the afternoon without all the clamps.


:text-+1: Isn't that what dining room tables are for now that we can no longer have guests in for meals?
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Re: Krenov lamp

Postby Robert » 05 Jan 2021, 15:30

I wouldn't worry for own use but if you ever came to sell this you'd need a rotational stop to prevent the cable getting twisted inside that swivel idea should someone wind it round and round.

Retired lighting engineer... and retired before LEDs got going so standards will have changed but I doubt cable management standards have.
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Re: Krenov lamp

Postby Woodbloke » 05 Jan 2021, 15:33

RogerM wrote: :text-+1: Isn't that what dining room tables are for now that we can no longer have guests in for meals?

I'm currently applying Osmo to my longcase clock project and I would dearly love to bring it into the kitchen diner and dump it on our huge teak table, wack up the heating and get it finished in a couple of days. In the 'shop as it is at the moment, each coat is taking a full 24hrs to harden off :( - Rob
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Re: Krenov lamp

Postby Pete Maddex » 05 Jan 2021, 18:20

Steve Maskery wrote:The swivel joint will be hollow, like this:

swivel joint.jpg


JPG this time! :)


I think you could get away with a single tube for the swivel.
Yes you could spin it round until the cable snaps or pick it up and pull the top off if you lift it up by the wrong bit, but you don’t need to design it with someone else in mind.

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Re: Krenov lamp

Postby Steve Maskery » 13 Jan 2021, 23:32

Well after a bit of a hiatus I did a bit more today. It's flippin' cold in there, so I've not spent as much time in the workshop as I should have done.

The Douglas Fir I am using is recycled from a load of 1930s doors I've been given. The recycling bit is very time consuming. I can't just sand off the old varnish as it just clogs the sandpaper, but when it is planed up is does look beautiful.

I'm converting the DF into veneers for laminating the curves.

Although the doors were normal height, 6'6" or so, I can't just rip off full lengths because there are the remnants of the dowel joinery in there.

dowel joint.JPG
(361.59 KiB)


dowel depth.JPG
(283.71 KiB)


But if I resaw from the faces, I can get two full-length veneers, some of which will yield 2 laminates (a couple are a bit damaged and will yield only one).

I don't like to have thin strips between my saw blade and the fence, even with a ZCI and a short fence, so I cut them as the off-rip. I have a little gauge

outrip setting gauge.JPG
(222.64 KiB)


My stock is held against it, the fence is moved up to the stock and the cut is made.

resawing.JPG
(153.68 KiB)


Does that picture look in focus to you? I've not got my eyes in and everything looks blurred, but I thinking that that looks even more blurred than I would expect. I'll try to get some replacements tomorrow, I still have more to prep.

It's slower to have to reset the fence for each cut, but you soon get used to it and it is much safer than having a very thin piece trapped between the saw and fence.

I'm cutting about 40% through, turning it over and cutting again, leaving a bridge that needs to be separated by hand.

hand sawing.JPG
(211.57 KiB)


I shall put all the laminates through the drum sander, so that they finish at about 3mm. I tried bending 4mm round my former but they started to fracture - 3mm works better.
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Re: Krenov lamp

Postby Mike G » 13 Jan 2021, 23:40

Steve Maskery wrote:........It's flippin' cold in there........


Why? You insulated, didn't you? And you've got a heater? What's gone wrong if you are still cold?
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Re: Krenov lamp

Postby Steve Maskery » 13 Jan 2021, 23:43

Yes it's quite well-insulated. But it's a big volume to heat and I already live (slightly) beyond my means.
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Re: Krenov lamp

Postby Mike G » 13 Jan 2021, 23:56

Ah, well then, I recommend hand sawing. If you chuck away all those jigs and grab a rip saw to resaw those boards, you'd not complain about the cold anymore. :lol: :lol:
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Re: Krenov lamp

Postby Mike G » 13 Jan 2021, 23:58

Oh, and yes, that photo is fuzzy. Your lens probably fogged up with the cold. ;) :)
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Re: Krenov lamp

Postby Cabinetman » 14 Jan 2021, 00:04

Hi Steve, you’re a bandsaw man, why didn’t you resaw them on there? It’s the way I normally do it when I’m laminating. Ian
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Re: Krenov lamp

Postby Steve Maskery » 14 Jan 2021, 00:05

Mike G wrote:Ah, well then, I recommend hand sawing. If you chuck away all those jigs and grab a rip saw to resaw those boards, you'd not complain about the cold anymore. :lol: :lol:


True, true, but my eyesight is lousy and deteriorating faster than I thought possible. One of the reasons I like using jigs is that they enable me to do things I can't easily do by hand, like see what I am doing.

I've just been put on the waiting list for a (third) cornea graft :(
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Re: Krenov lamp

Postby Steve Maskery » 14 Jan 2021, 00:07

Cabinetman wrote:Hi Steve, you’re a bandsaw man, why didn’t you resaw them on there? It’s the way I normally do it when I’m laminating. Ian


I should do, but I've recently damaged the blade (stupid mistake) so I need to sort it out. I do have a spare rip blade, but for a job like this I prefer a NEW blade, not just a spare one. I need to talk to Ian.
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Re: Krenov lamp

Postby Malc2098 » 14 Jan 2021, 12:22

I'm just about to start the last lap of building a guitar side bending machine which heats about 2mm thick wet guitar sides and slowly presses them round a guitar, or ukulele, shaped former. I will use a silicone heating blanket controlled by a Digital PID Temperature Controller,

It occurs to me that the same apparatus could be used to curve your laminates. All that is needed is the shaped former.
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