10k 50mW Green Scanner Build

[lamborgini8]

Il start by saying this was originally andys 10k ILDA scanner, that I bought from him a while back. I am only using the DMX for this build but I plan to make a 30k ILDA RGV (Maybe RGB) in a few months time.

I bought it before Christmas and have had the drawings for the layout all sorted for some time now but have only just gotten around to finding a day I can use the pillar drill at work to actually mount the components.

Here's the layout anyway, its being placed into a small 279x190x89 enclosure with all components mounted on an aluminium plate that will be bolted down inside the enclosure.

Im not sure about the 10mm space around the outside for the bolts seeing as that only gives me 5mm to bolt it down, although the plate is pretty strong so it might be ok.



*Old layout in picture, the new layout is above*


Going inside the scanner is a rather over powered 50mW module from DragonLasers. I don't actually have a power meter so I don't know exactly how much its putting out but it can light matches from 1 meter away.

Cooling the thing is a bit baffling now because I don't know how I should do it to maximize cooling. I havent included the front and back layout drawing because I dont actually have the enclosure yet but there is a big gap between the PSU and DMX board (drawing it so scale ). The DMX board is being mounted 1cm up from the aluminium plate which leaves around 75mm space there with 1cm between the board and the back of the enclosure.

I don't know where I should put the fans, the logical place would be to put it where the gap is but don't I need two fans? One to suck air in and one to blow it back out again? Should I put one behind the AMP in the 1cm gap? I really am clueless about this part.

[RGbee]

My projector has only 1 fan blowing warm air out of the projector and a separate intake grill (mounted the other side) with a hepa filter. That way, it still sucks in cool air through the filter, so no dust. As it's only a single greenie, you might not need a second fan

[Things]

Its not really the heat from the laser you have to torry about -- 50mw green wont produce much heat at all, even your baseplate should be able to handle it. Its more the PSU's and galvo amps that need the cooling. With that projector though, I doubt more than 1 fan is needed.

[dar303]

I built a mini-green projector with exactly the same scanners and a 35mW DX doing about 80mW a few months ago, I'll post some pictures!
It doesn't have any fans and live fine without it!

[lamborgini8]

Well its probably going to be used quote a bit and kept running for a long period of time which is why I am considering fans.

The enclosure its going into has a bottom part and a top part and is U shaped. I have designed it so that once the base plate is fixed to the bottom of the enclosure all components will be fixed to the bottom half making it easy to just remove the top plate without having to disconnect anything.

Maybe if I just put a small 6cm one next to the PSU to suck out the air will be fine, there isn't going to be anything to cover over the exit hole by the galvos which could work as a intake. Only trouble then is its sucking air over the galvos in a smoky room...

Edit: Moved the galvos 5mm back from the position on the drawing so it lines up with the laser better.

[Anthony]

I built a mini-green projector with exactly the same scanners and a 35mW DX doing about 80mW a few months ago, I'll post some pictures!
It doesn't have any fans and live fine without it!

80mw??? what current where you feeding that thing?

[dar303]

About 350mA's I think. It can be driven even harder, to about 100mW. It can survive this for a long time, I have been using it for at least 60 hours so far.

If you think this is to much threadjacking I can move them over to a separate thread!

Here are pictures of my projector.
The Aixiz green on these pictures was faulty so I replaced it with the DX, a D4drive and a 5v Ericsson mobile phone adapter.
The mirror is a low quality one from a fax machine, I'm replacing it wit a laserwave mirror.

[Anthony]

350ma?

i have had 3 of those lasers...
the current one i'm feeding 390 mA and its putting out max 48mw

The other ones i have fed 420mA putting out 62mw.
Must be something wrong with my power meter!!!!

the 405 (803 diode) 100ma puts out around 60 mw on my meter.
Humzz


Sorry for the hijac

[keeperx]

bad meter..
100ma should be a little higher than that..
like 85mw or something

[Anthony]

bad meter..
100ma should be a little higher than that..
like 85mw or something

Its a SYNRAD PW1 (2% correction at 405nm)
The manufacturer says it doesn;t re calibration ever.
stange guys those CO2 laserguru's