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Hi Giannis, Have you got the bad driver from Matt? Do you still want them? I have purchased 2 more from diferent ebay suppliers and both do not work either (so they did not even burnt). I could send you all 3 if you want to play with them, Greece is not far from here...

Here I have made a big expander to 5x tighten the spot (post 202). https://laserpointerforums.com/threads/nubm31t-95w-455nm.104929/page-13#post-1594264

Yes, impossible for this array because there are no such small lenses to put over beams. However maybe possible with bigger MDP like NUBM36. The problem is that optic shop in ali which is selling small lenses does not answer my questions...

I think it depends how ofen they are used. I have NUBM05/6/8 with ball lenses removed in 2016 an they are still fine. Of course I only had them on maybe 10 minutes in all the years...

A, you both like my old idea of making lasers from drills and screwdrivers! Was it snow in Florida on the videos?

Please ask the Moderators to delete this thread. I also prefer to keep the old thread instead of starting the new one. Even if some people may call it necrothreading! Because the REAL BUILD can take years to be finished!

What makes me bad about this driver is that it is the only one which pops up when you search NUBM31 or PLPM4L in ebay and it is not a cheap one - 60usd and everyone would think it to be the right and professional driver for these two MDP chips. Meanwhile the BST900 booster from ali I use all...

The spring M2 washers I would need here must have external diameter <4mm. No idea where to find them.

PLease write your experience with this driver! Mine was very bad - capacitor E5 burned after 1 min of charge. I guessed from start that boosting from 12V to 85-100V, 3A was a very bad idea of driver design at all - now I have a confirmation. Likevii - what driver are you using for your set up...

Now I did similar experiments with NUBM35 MDP chip. But all pics are in the thread about NUBM38 (which is almost the same as NUBM35): https://laserpointerforums.com/threads/nubm38-75w-mdp-chip-focused-at-5m-distance.107898/

Here I took off the gang lens of NUBM35 (which is constructionally similar to NUBM38 but was a little cheaper and less precise in orientation of the beams) and also removed the metal cup where the gang lens was atached to. Unfortunately it was also holding the glass window, so all emitters are...

No, styropyro's bazoka beams were neither expanded, nor steered. I want to make a proper laser, not a laser torch. Here is the thread, the process of manufacturing is still ongoing...

This is to continue the old thread with proper name of the chip what was not on ebay 1 year ago when I got it from taobao and started playing: https://laserpointerforums.com/threads/osram-60w-multilaser-chip-with-24-beams-jlm450nm.106325/ Now its commercial name is PLPM4L. In an attempt to make...

Hi Giannis, On the picture with red MDP (Multi Dye Package) what is the total voltage to drive the row? Can your booster drive a row of NUBM31? What are the voltage/current limits of your booster driver? I read the thread but did not find these data.

I am not sure how they can keep the divergence such low. Are all beams not directly from LDs but expanded and steared by mirrors? I am in the process of manufacturing a "DMD" now to steer 16 expanded beams from 2 blocks of NUBM08. This would be a small vesion of this "cannon". But maybe...

Gazer: Spot pics are made through OD6 googles. Curtis: Yes, I checked it focused at 20cm to cut stainless steel (at 3A current) - it cuts but not as fast as 31T, so it looks that power is important (even if not as good focused) to heat adjacent areas of the heat conducting metal. I have also...

Not sure if anyone is still interested in powerful lasers in the current political situation, but I have more pictures today. Here I have purchased NUBM38 which is smaller than NUBM31 and it also produces a smaller spot on the wall while its 75W power is not much less than 95W. If the beam is...

Hi Alaskan, Here I have added the refocusing plate with only 4 of the16 holes holding 2 Sanwu G-2 each. This makes the 4 originally badly focused beams to be focused well but at the cost of losing the direction. When focusing them I had to cover rest of the beams with millimeter paper. It also...

Another experiment I did was with big cylindrical lenses: I had the big convex with f=76mm, so I bought a big enough concave to fit all the pack of beams from NUBM31. Thorlabs had one with dimentions 40x20 and f = -30mm. So the expansion ratio here would be 2.5x But this method did not give...

I am still trying to get a decent beam out of this MDP. Alaskan wrote that to tame beams one can use a beam expander. Me too do not see any other way as simple as that, even if it cannot allow you to obtain perfect parallel beams this would at least make possible to focus the beams at longer...