Recent content by xchg

This is great idea, I think I might try this. There is something I have in my head as well - to do hot fit, heat up AL housing a lot (~400-500C) - it should expand and jam copper laser host in hole quickly hoping it will stay there dead when housing cool down. Thank you guys for support! I...

Thank you for suggestions, major issue is to have good interference between laser host and waterblock, In my case I do have some play between 12mm host and aluminium body, so I believe there will be the worst thermal interface in whole setup. I have to come up with good solution to this. May be...

This is build log for the water cooling module for 3W 445 nm Blue Laser ( NDB 7875 ), to allow laser run at 2.4A for extended amount of time. Practically you can use any kind of laser diode in the standard AIXIS style 12mm module, current will be limited by capacity of FlexMod Original article...

Re: FS: 12x30mm MODULE HEATSINK BLOCKS 1.5" SQUARE I like it, looking cool! But what is the weight of the unit ? Will you ship to Canada?

Alright if someone interested in my Investigation: Looks like fixing FlexMod is no go, after replacing mosfet and fuse I got nothing, and eventual overload of 1A limited PSU. I noticed that it has 2 TVS diodes rated 24V, one on modulation input, another on LD output +, kinda wondering why 24V on...

Thank you ARG ! Main idea here to NOT mod anything in printer. Everything was pretty much easy, what gave a lot of grieve is 24V, as you know from another thread :) Workflow is simple: - Get Inkscape - Add Laser engraver Extension ( found in internet ), whcih saves path as gcode. - use gcode...

I got it already :o thank you, geez your analogies make my skin crawl :p Looks like DCDC is the easiest way.

Here is post http://laserpointerforums.com/f42/laser-cutter-addon-rigidbot-3d-printer-91574.html#post1330633 explaining stuff

I'm happy to share initial prototype of RigidBot laser cutter, utilizing 2nd extruder place and parts. This is really early prototype, but it frigging works and I'm so excited that I decided to share :) I run 405nm laser at 600mA, with proper heatsink. All this crap mounted on custom designed...

This is contraption attached to 3D Printer which has only 24V... and 5.

What about idea of replacing: IRLIB9343 by this - http://www.irf.com/product-info/datasheets/data/irf9530npbf.pdf I'e checked specs - seems good too me.

I don't think this is relevant comparison.... Overheating of mosfet would be critical failure, and when this happens it shorts and sent all Vin to diode... where is protection from driver failing? But lesson learned - and lesson is - LEARN The hardware you work with. I guess for schematic I...

So what would be the right solution - can I stick befoer FMod DC-DC switch mode converted like some of those one hand low from ebay, providing it can handle 4A? LM2576 based for example? Edit: LM2576 is 3A max, some other regulator like this

make sense, but that means this drive physically cannot drive stuff at 24V 4A period. This assumption was my mistake, without thinking.

Reading doesn't mean understanding I though Maximum continuous power dissipation, is output power, in my case I would have been less then 25W. Can you please share how did you estimated 50W of dissipation? Thank you for mosftet info! Also kinda sucks that there is no LD protection, having...