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Banggood laser modules: fact or crap?

Posted by av8r1 
Banggood laser modules: fact or crap?
June 10, 2017 03:03PM
I have access to some CO2 lasers at my makerspace, but I can only make the trip in 2 days a week. I'd like to have a little machine myself for my little side business manufacturing wooden key fobs, and I think a little 2.5W blue laser will do the job. Banggood has some for ~$70 American, and I haven't seen a definitive yea or nay on these. Thoughts?

They have whole engraver kits available as well, but I've got the necessary parts lying around from building 3D printers, I can toss a gantry together.
Re: Banggood laser modules: fact or crap?
June 11, 2017 12:21AM
By not providing a link to a module, you expect us to judge "all" laser modules on banggood?
I would ask for the diode that is used in it and then compare the rated output with findings from the US-laser diode Guru "dtr". Or buy your modules from him.
VDX
Re: Banggood laser modules: fact or crap?
June 11, 2017 03:29AM
... the "crappy" thing with this cheap laser-modules and -engravers are the drivers, which are mostly overdriven or not stable enough to drive the diodes without over-current spikes when switching ON/OFF.

If you DIY or find a good driver (and the correct specs of the diode), than any diode will do ...


Viktor
Re: Banggood laser modules: fact or crap?
June 11, 2017 09:43AM
VDX
Re: Banggood laser modules: fact or crap?
June 11, 2017 10:00AM
... replace the crappy constant current circuit inside the diode housing, then this could be OK ...


Viktor
VDX
Re: Banggood laser modules: fact or crap?
June 11, 2017 10:04AM
.. and ... this statement is nonsense!

Quote

Working Temperature -40-75℃

Sound ambient temperatures are more like 19 - 25 °C, and you should avoid heating the diode housing above 30°C !


Viktor
Re: Banggood laser modules: fact or crap?
June 12, 2017 11:14AM
Browsing that "dtr" site, these 2.5 watt lasers are reaching dangerously close in price to a 40 watt CO2 system from LightObject. I'm looking to get this done for around E3Dv6 money,

So what makes a good vs crappy diode driver? What do I look for?
VDX
Re: Banggood laser modules: fact or crap?
June 12, 2017 02:46PM
Quote
av8r1
So what makes a good vs crappy diode driver? What do I look for?

... not only, but often -- the price ... don't expect to get a quality product for pea-nuts eye rolling smiley


Viktor
Re: Banggood laser modules: fact or crap?
June 12, 2017 08:01PM
Okay, Viktor doesn't have any useful advice. Anyone know anything about constant current power supplies?
VDX
Re: Banggood laser modules: fact or crap?
June 13, 2017 12:30AM
... did you read the related topics here, in the "Laser Cutter Working Group"?

There are a lot of infos regarding CC-drivers or links to sources of them.

Here is an old wiki, where I've collected some of the basic infos related to lasers - [reprap.org]

You have already seen the DTR-site, so here another from Germany - [www.lasertack.com]

But, without specifying your entry base, it's on you to find and filter the infos, fitting your need ...


Viktor
Re: Banggood laser modules: fact or crap?
June 20, 2017 05:30AM
there is another alternative lasers from Endurance.

powerful and offer an ultimate support for customers unlike Chinese guys)))


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Re: Banggood laser modules: fact or crap?
June 23, 2017 12:38AM
we made this comparison tests: [www.youtube.com]


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