Any good bottom light recommendations?

[Philip Kristoffersen]

Hi,

So I am still using my light ring from the LitePlacer and its just not cutting it.

After looking around a bit I can't seem to find any good bottom lights or even small tutorials on how to make / adapt one. 

Does anyone have any good recommendations or guides? :)

[Mike Menci]

https://www.youtube.com/watch?v=Awy90LeXo2E

Google ebay - Aliexpres : coaxsial light 

[Philip Kristoffersen]

Thanks Mike!

I did end up making my own instead - I found some 12 LED rings laying around, so I took some inspiration from other posts on here :)

40 mm fan added for some cooling, since the LEDs to get quite hot under the diffusers. 

Potato quality, but should hopefully show the result well enough :)

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[Mike Menci]

Post the image you get from camera ... It seams like lots of light ! 

[Philip Kristoffersen]

Hi Mike,

Following is a picture takes of a 0603 resistor:

I am giving the LEDs 9 volts, because otherwise it will be too bright. 

I am having a slight problem with the nozzle tip showing up in the vision though .. the CV seems to like the edges of the nozzle.
Any idea how I could potentially get around that? I tried darkening it, but that ended up a mess so I cleaned it off again.

- Philip

[Mike Menci]

Clean black cover from nozzle tip to get a white bottom surface ( I use very fine sand paper) try it .. 
Mike

[Toby Dickenson]

Have you enabled nozzle background calibration?

https://github.com/openpnp/openpnp/wiki/Nozzle-Tip-Background-Calibration

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[Koichi Kurahashi]

Sorry if you’ve already tried this, but what worked for me was redefining the package footprint and tweaking the camera brightness/contrast until it recognized the part cleanly.

It also helped to close the curtains and keep the room lighting as consistent as possible.


koichi / PSE-3000 user

2026年7月2日木曜日 19:40:18 UTC+9 philip.k.kr...@gmail.com:

[Philip Kristoffersen]

Thank you all for chipping in!

It would seem my diffusal wasn't quite up to standard - temporarily adding a few pieces of white paper over the LEDs diffusers got the light to where it needs to be. 

I will have to figure out a better long term solution, but it will work for now :)

- Philip

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