Is there a link to your "community project" you can share ?
Thanks - you are an awesome source of knowledge and inspiration !
George
Is there a link to your "community project" you can share ?
Thanks - you are an awesome source of knowledge and inspiration !
George
... one thread is in the German RepRap-forum - http://forums.reprap.org/read.php?336,772536
The other in another (German too) CNC-forum with login ...
Viktor
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Hi Jerry,
this is the simplest design, based solely on the datasheets and a pretty old idea for combining/parallelizing of currents.
My "comercial" driver is a bit more complex and based on current controlling with OpAmps, optimized for "spike-free" switching - but too, not so complex and overloaded with components, like other high current drivers ... and with a small Arduino for several modes of interfacing to different electronics and power controlling.
Here is one of the prototypes, configured for the 9Watt@9Amp-IR-diode (but will work for any other type too) -- could be, I'll give it free for DIY with time too - but not so fast ...
Viktor
... today I've assembled a 30Watt module for experiments with laser-soldering (and maybe some SLS ):
- first cleaved the fiber and glued it into a capillary, into a threaded tube, into a protecting hose:
- complete assembly with fixing to/into a cooler, the 5-step-selectable (0,5A to 8,6A) constant-current driver in the background:
- adjusting the spot distance for 200mm - there it's not a tiny dot (like 0,1mm in 30mm distance), but more like 2-3mm in diameter:
- below threshold power @400mA:
- above threshold @550mA:
- @1A, emitting roughly 3,3Watts optical power (maximum for the indicator plate):
Viktor
Last edited by VDX; 12-13-2017 at 11:12.
Viktor:
Looks awesome !
I'm in the process of gathering the parts to sort of duplicate your driver -
Will be using 3x LM338's and planning to get between 9-12 amps output.
A few questions - why the heavy protective tube ?
What voltage are you using as input to your driver ?
Thanks !
George
Victor:
The F-BK2 cleaver is not normally used on 105um fiber -
I think it's typically meant for 125.
Are you finding it working fine, despite the fiber size difference ?
Thanks !
George
... I've opened one - there's a resin tube as "bed" for the fiber -- should be good enough for 105µm too ...
Viktor