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Ok, so the datasheet for the Lasorbs says that they should be connected no further than 1cm from the diode.
Well that would require it to be inside the Aixiz housing, but the Lasorb is too big to fit.
So what does everyone else do about mounting their Lasorbs? Do you just mount them as close as reasonably possible?
Any pics to show what you've done?
Quote:
Originally Posted by 300evil
freakin show off!!!!
Dang those is sexy.
Ha! Thanks! I wanted to get the lasorb a little closer so it would sit on the base of the modified Axiz module but the smallest soldering tip I had is only so thin.Quote:
Originally Posted by Laserman532
Now, if I only had the parts to build me a dual blue! O_o
http://i512.photobucket.com/albums/t...2/P3036117.jpg
wait a while, i think dr lava will have a dual for about $40.00 *retardo
Na, I want a matching set. I'll wait for yours.Quote:
Originally Posted by Laserman532
but they still will not fit in the module barrel, correct?Quote:
Originally Posted by 300EVIL
Quote:
Originally Posted by dream beamz
Correct.... although. You may be able to carefully sand off the casing just enough to make them fit.
Acording to Pangolin's product video you just lose protection between the zorb and the diode; if that section is enclosed inside the barrel then there's no problem.
But the barrel is just a codpiece anyway, it just sticks out and gets in the way.
Whats the additional resistor for?
For current distribution if you use a parallel diode setup.
I advice against this and suggest a series setup.
Hi Norty,Quote:
Originally Posted by norty303
Here's a good description of what to do if running diodes in parallel, and the reasoning behind the balancing resistors...
Hey FourDee :)Quote:
Originally Posted by FourDee
I've seen you recommend this elsewehere. I'm interested to hear how you set the driver up to provide the power when running diodes in series. Do you just simply multiply the individual drive current by the number of diodes, or...?
No that's what you would do for parallel diodes.Quote:
Originally Posted by taggalucci
When wired in series, you set the desired operating current and make sure your supply is equal to or greater than the combined forward voltage of the diodes and the voltage drop over your driver.
This method will not damage other diodes when one suddenly fails or the wire comes undone or ...
Quote:
Originally Posted by taggalucci;
:confused: I'm confused!Quote:
Originally Posted by FourDee
Thanks FourDee :)Quote:
Originally Posted by FourDee
OK, I'm a bit naive when it comes to this talk of "forward voltage" of diodes and "voltage drop" of driver. How does one establish these and therefore calculate the supply?
I suggest you contact the supplier of your driver for this number
I know that the die4drive has the following voltage drop:
1 x current + 300mA
So for 1A of current, there is a voltage drop of 1,3V over your driver
The forward voltage is just a characteristic of your diode
That makes sense. Thanks for that :)
Any idea what the forward voltage is for the Casio 445nm diodes?
About 4,3V
15 characters
Can someone explain how the driver voltage and diode voltage work out?
I have some flexmods, and although it says about adjusting the amps, I have no idea what voltage it puts out, or even if its right for the diode! I was working on the basis it was just 'right'
I'm guessing it takes 5-12v in and regulates it, but can't find what the output voltage is. I would think that different diodes need different voltages but I've never seen anyone ever talk about voltage supplied, and people use flexmods on a range of diodes (so it must be right, right?)
Or have I got this all hopelessly wrong?
Its a constant current driver, no need to worry about the diode voltage (so long as your supply voltage is at least diode voltage (4.4v) + 2v or so for the driver.
In other words: Say you are feeding the driver with 12v; you can short out the output and it will happily supply the set current in to the short circuit. It will supply this set current up to a forward voltage of around 10v (so you could run 2 diodes in series to more or less at full power whilst only loading the driver with 1A, then remove one diode from the circuit and nothing will change, the driver will still only push 1A through the single diode).
Hope that's clear :).
Thanks Doc.
So I'm not going to be able to take 5V off of one of my Laserwave PSU's? I guess I'll have to take 24v off my scanner PSU and regulate it down. No space for another PSU in there.... :)
Running parallel is not bad in my opinion. I havn't lost a diode yet. The reason I went for parallel is to be able to run all my lasers on one 5V @ 22A PS. I would highly suggest not hooking to your galvo PS. The current draw will most likely create imbalance to your scanners.Quote:
Originally Posted by norty303
But I thought I read on another thread that I'd need at least 7V into my flexmod to avoid voltage drop? I'll only be running one diode per driver
Oh, and by the way Mr Evil, what are the proper names for the 4 pin and 2 pin plugs on your flexmods? I've got some header pins I can add to the output holes, but I don't know what the correct name is for the others so I can search for them.
'4 pin white plug' doesn't quite cut it :D
edit: is it this stuff for the 4 pin one?
http://www.maplin.co.uk/Module.aspx?...rderCode=RK65V
http://www.maplin.co.uk/Module.aspx?ModuleNo=1490
Actually, I don't think they are, the 0.1in is same size as the header on the output holes, which is different spacing to the power and mod ones
Not trying to hijack here...just looking for a better understanding as well *vigilQuote:
Originally Posted by Doc
My plans are to feed the driver with a 12v/8A psu dedicated to 445nm only. Say I want to run a dual setup, is it better to run a parallel or series circuit for the diodes...or is it a matter of personal preference? I'm making the assumption that the stated psu is more than enough.
Given that you have 12v I would personally go for series and do away with the balance resistors.Quote:
Originally Posted by Synce
I think he'll struggle with that: say 4.2v for the diode plus a couple of volts for the balance resistors plus the driver loss......Quote:
Originally Posted by 300EVIL
Well, I'm going to give it a shot myself. It's not like I need 2W of 445 anyway. ;)Quote:
Originally Posted by Doc
So, do you think I'll get away with 5V from my Laserwave psu then for a single diode?
And the names of those plugs/headers please?
Shouldn't be a problem whatsoever. My guess is you'll obtain right around 1W max. Haven't received my diodes yet so I;ll have to see exactly what is obtainable.Quote:
Originally Posted by norty303
The link you provided is basically the same header pins I use. For the 4 pin power in and mod header, you do have to bend the pins to make them work but looks and works good.
Ah, so you cheated! I measured the holes and I was struggling to find a decent selection of 3.5mm pitch headers. That explains why! Thanks, I can just get them all from Maplin then.Quote:
For the 4 pin power in and mod header, you do have to bend the pins to make them work but looks and works good
Oh and I'm only looking for about 4-500mW from each diode, so I think about 6-800mA output per driver should do.