Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

[Luis-F-S]

Not a very convenient enlarger for 6x6. What bulb does it have?

[philcedozphotos]

Not a very convenient enlarger for 6x6. What bulb does it have?

Currently an opal 300w incandescent.

I’m hoping to find a suitable alternative as I can’t really find those anymore.


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[Luis-F-S]

I’m hoping to find a suitable alternative as I can’t really find those anymore.

See the thread below which discusses bulb choices for an L-138. Same bulbs for the L-184.

https://www.largeformatphotography.i...ighlight=lafan

L

[philcedozphotos]

See the thread below which discusses bulb choices for an L-138. Same bulbs for the L-184.

https://www.largeformatphotography.i...ighlight=lafan

L

Thanks! I got a g40 and an LED panel on the way to try out.

The manual says that the condensers should be curved sides toward each other. This results in the nameplate on the top condensor being upside down. That is the correct orientation, no?


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[ic-racer]

Yes that would be correct to have the two convex surfaces toward each other.

[Luis-F-S]

now this starts to get interesting... which materials? cost per unit?

Got an Email from rushgears.com, and this is what they said about the nylon gear on the handcrank/motor:

This is an injection molded Spiral Bevel Gear.

This is the most difficult type of Gear to reproduce and the most expensive to machine in small quantities regardless of material.

Figure $5k to $10k in tooling, engineering and setups.

It is just not a practical proposition.

So, if you've got a source, I'd be interested to hear about it, unless you have 10G's burning a hole in your pocket you'd like to donate to the cause!

[Andrea Gazzoni]

not sure for who your question is, anyway as a quick reference a specialized company here in Northern Italy was asking me about $150 for a nylon/delrin gear and $320 for an aluminum one, cnc lathe machining. prices were much decreasing for 5 units, halved for ten pieces. this is for production only, you have to provide the technical sketch or CAD file.

[ic-racer]

Again, I don't have that gear in my enlarger, but I still don't see why it can't be 3D printed. This guy 3D printed a gear for a friggin lettuce washer.

[Bleachedfan]

I have a case of the opal bulbs, if anyone is looking.

[philcedozphotos]

Again, I don't have that gear in my enlarger, but I still don't see why it can't be 3D printed. This guy 3D printed a gear for a friggin lettuce washer.

I’m sending my old gear off to a buddy who has a 3d printer (well, buddy of a buddy). I hope he has better news, but due to the helical nature and the bevel, it’s apparently very geometrically complicated.

Does your column go all the way up?

Per the manual it says the max height is 108.5” and it stops here. I didn’t want to force it with the new gear.

I did a first round of test prints just to gauge the setup and it took about 35 seconds with the grade 2 filter at f8 for a correct exposure with the g40 150w.


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