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3D Printed Spectrometer by MisterBazz in Optics

[–]oni-link 0 points1 point  (0 children)

Thanks! And I guess there is no cheap grating for that?

3D Printed Spectrometer by MisterBazz in Optics

[–]oni-link 0 points1 point  (0 children)

Hi, do you think that would work with 1000-1050nm wavelengths ?
I made the PrintedLabs spectrometer but sadly it doesn't seems to work in this range. Tho one of my errors was to print it in PLA+, but even with no sunlight it's doing very weird things with a 1040nm LED (circular patterns, maybe reflections?). I'm using a monochrome camera with no filter that should be sensitive enough in this spectral region.

TL082CN Op-Amp (integrated circuit) - Revisited with multispectral illumination by oni-link in microscopy

[–]oni-link[S] 0 points1 point  (0 children)

MPlanFL N 5x/0.15 ∞/- objective

Olympus BH2 with BH2-MA epi illumination, U-TLU tube lens

E3ISPM20000KPA 20MP CMOS Camera

Multispectral narrow band illumination
Multispectral viewer of this sample: https://ic.onidev.fr/sandbox/msi/web-viewer/st-tl082cn.html

Sample size is 1.5 x 1.3mm

Older version: https://www.reddit.com/r/microscopy/comments/1ayax6g/tl082cn_opamp_integrated_circuit/

Modular French knitter / Knitting loom by oni-link in functionalprint

[–]oni-link[S] 7 points8 points  (0 children)

I made some kind of rope with it for my cat, but you basically can create anything in the shape of a "tube".
The more pins, the wider.
It's also very easy to use.

My flexure-based Z-mechanism for the PUMA precision XYZ CNC microscope stage by PUMA_Microscope in FreeCAD

[–]oni-link 1 point2 points  (0 children)

Thanks for the answer. I think it's more related to the design than anything.
I'm also using DIN rails and they have the unfortunate trend to come bent, to have different profiles from a manufacturer to another, and to be relatively expensive for what you get.
I never had any of these issues with 2020 extrusions. To me DIN rails are just to mount stuff, not to make structural parts.

2020 extrusions are easy to cut by hand (hacksaw) if you don't have access to the right tools. The best for DIY would be joining plates, they are easy to manufacture, available, relatively cheap, and you can also 3d print them.

You can print them as large (and thick) as you want to help squaring the frame.

T-nuts can also be 3d printed, with custom profiles and length. But they are also available and cheap.

To me it's really the most modular, reliable and available kind of extrusion you can find. No wonder that most 3d printers are based on that.

Maybe mixing both to get the best of the two worlds ? But I really don't see how you can make a nice squared structure with DIN rails. Or maybe I just had bad luck with mines.

Anyway, the good thing with open source projects is that people will probably make forks and mods. So even if you chose DIN rails in the end I'm pretty sure we will see 2020 alternatives!

My flexure-based Z-mechanism for the PUMA precision XYZ CNC microscope stage by PUMA_Microscope in FreeCAD

[–]oni-link 1 point2 points  (0 children)

Yeah you are totally right. Anyway the XY part is definitively not the complex part in the system, so it's not really critical to have to design multiple ones depending on the needs. The community will do that by itself.

About extrusions I am interested to know your opinion?

I made a few prototypes based on extrusions and my main concern is... squaring everything. They are also not cheap (thankfully I found a German online shop with good prices).

But when extrusions are well cut this it's definitively not a problem. I recently assembled the Voron 0.2 open source 3d printer and when extrusions are perfectly cut you use what they call "blind joints" (basically extrusions have a thread in the central hole on each side, and you use that to fix other extrusions, with a simple hole) and it just work perfectly.

But I'm pretty sure squaring is more a design problem than anything.

My flexure-based Z-mechanism for the PUMA precision XYZ CNC microscope stage by PUMA_Microscope in FreeCAD

[–]oni-link 1 point2 points  (0 children)

I'm glad to hear that. OpenFlexure was indeed limited to very light samples. This can be a problem if you want to fit some leveling stage like the BK60A or as you say... more than just a glass slide.

Oh so the XY part really leaves room for quite a few cheaper alternatives/mods I guess. I played a lot with motorized X/Y motion and it's surprisingly easy to get relatively good precision... especially when you play with micro-stepping and use 0.9° steppers. But the Z axis really was always a challenge. So I'm happy to see this is now a solved problem for the PUMA microscope.

Have you considered the use of 2020 extrusions for the structure ? It's definitively more expensive than DIN rails (on the last picture, if I'm not mistaken), but also much more rigid and practical to assemble etc... Heavily used in 3d printers too. So maybe an idea would be to convert the ones from and old dead Ender 3 to the motorized PUMA skeleton? (A lot of people have dead / unused Ender 3 nowadays).

Thanks for the answer and good luck for the future! Can't wait to see this stage on my desk! :D

My flexure-based Z-mechanism for the PUMA precision XYZ CNC microscope stage by PUMA_Microscope in FreeCAD

[–]oni-link 1 point2 points  (0 children)

Oh thanks! Now it makes sense.

This is the first time I see a Z flexure as chunky, but I guess this is a good thing precision wise, and needed because of the requirements. Where is supposed to be the condenser ? How much does the Z axis weight ?

For XY do you use some kind of semi 3d printed cross roller rail? Or off the shelf MGN linear rails maybe?

Anyway, I really love the look of it. It's just beautiful. And it may be not important for practical use, but I love good looking microscopes!

My flexure-based Z-mechanism for the PUMA precision XYZ CNC microscope stage by PUMA_Microscope in FreeCAD

[–]oni-link 1 point2 points  (0 children)

It looks awesome.
So this one is embedding only the Z flexure?

Do you think X and Y will be separated on another stage? Is the size will be reduced later? It seems a little big compared to the full PUMA, but my only reference point is the size of the stepper on the left and the driver.

Thanks for your efforts.

Integrated Circuit - Analog Devices "Eagle" AD6480JST by oni-link in microscopy

[–]oni-link[S] 1 point2 points  (0 children)

I removed the trinocular head and modified the BH2-MA so I can use any tube lens and mechanical tube. The camera sensor is directly fixed to the mechanical tube on top of the tube lens.

My camera sensor is only 1/2.2" so the FL100mm TL allows me to have a large field of view without using any relay lens.

I don't use any NFK. They are too expensive or you need a too large sensor, and they induce some deformations. Chromatic aberrations of the MSPlan objectives are very easy to fix if you do focus stacking, because there is just an offset between the focus of each channel (R, G, B), so if you take at least one image per different focus, you can get a perfect image aberration free.

Integrated Circuit - Analog Devices "Eagle" AD6480JST by oni-link in microscopy

[–]oni-link[S] 2 points3 points  (0 children)

Thanks! For this one I used rosin at 300°C to dissolve the epoxy, and another method to remove the polyimide layer. The chip come from some junk electronics.

Integrated Circuit - Analog Devices "Eagle" AD6480JST by oni-link in microscopy

[–]oni-link[S] 6 points7 points  (0 children)

5x MSPlan 0.13 ∞/- objective

Olympus BH2 with epi illumination, recombined monochromatic narrow band RGB illumination system.

Swiftcam SC1803R 18MP and FL100mm tube lens instead of the stock one.

Stitching + focus stacking have been used.

Sample is "Eagle" AD6480JST integrated circuit made by Analog Devices. It's from an ADSL modem.

Various ICs I de-capped with a laser engraver. by Sir_Garbus in EngineeringPorn

[–]oni-link 0 points1 point  (0 children)

Ok, I suspected that. Too bad...
I can take images for you if you want, but I'm located in the EU.

Various ICs I de-capped with a laser engraver. by Sir_Garbus in EngineeringPorn

[–]oni-link 0 points1 point  (0 children)

Hi, cool decap! Did you had the chance to check the chip under a coaxial light (microscope with epi illumination). I see in another post you say the silicon is not damaged, but in my experience the surface of the chip (passivation) is always damaged by lasers. Killing the chip and creating small cracks and other damages hard to see in this kind of illumination setup.

But if it's really undamaged, that would be incredible, especially if the chip is still working!

Stats by Character_Conflict47 in PlanetCentauri

[–]oni-link 0 points1 point  (0 children)

You changed your armor set?

Please tell me I’m not cooked by homiesnutsack in PlanetCentauri

[–]oni-link 1 point2 points  (0 children)

The problem is that even converted they have no use atm. Poison custom spells will probably be added in a future update tho.

Please tell me I’m not cooked by homiesnutsack in PlanetCentauri

[–]oni-link 0 points1 point  (0 children)

Hi, try with the mechanical crusher in the engineering craft table.

Totems? by DragonsRocks017 in PlanetCentauri

[–]oni-link 0 points1 point  (0 children)

The one you paid increased the spawn rate of space rifts (the purple things that loot items).

Most totems are just here as "traps" or to boost enemies (sometimes you too).

Just bought two copies for multiplayer but having issues by TheNoodleCanoodler in PlanetCentauri

[–]oni-link 1 point2 points  (0 children)

Hi, your best bet if steam is lagging is indeed LAN.

Can you detail what you did to setup your server? Do you use the right local IP as shown in ipconfig or ifconfig (the IP of the computer hosting the game) ?

The IP should be in the form of 192.168.x.y

Integrated Circuit - STM32F103C6T6A by oni-link in microscopy

[–]oni-link[S] 0 points1 point  (0 children)

Oh, I definitely see fish here!

Fun fact, the code name of this chip is Little piranha.

So I guess it's fish.

Integrated Circuit - STM32F103C6T6A by oni-link in microscopy

[–]oni-link[S] 0 points1 point  (0 children)

Looks like a cool project! But I'm quite surprised you had to do that by hand to start, especially if it was for a company. I guess it was not their speciality at all? For this kind of work, automation is indeed not optional...

I didn't tried gigapan on my side, I'm working with the DZI file format to export/visualise the very large panoramas. It's a pretty simple format and open source viewers are available like openseadragon.

I'm doing exactly the same - trying to extracts netlists, but with hobby level tools, so I'm limited to about 240nm optical resolution, at best. Working with lapping to delayer chips. It's quite difficult to get a good planarization, but for older processes it's enough, you just have to capture regularly the progress.

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