Hi TDD & dekutree64, Another quick follow-up as I am currently quite busy with many different things ... I am still considering what to do but have very little time. I do however appreciate your feedbacks and will get back again when time allows ... Cheers, Jesperby evalon - General New Machines Topics
Hi both ... Just a brief message to say that I have seen your posts and will get back either on Sunday or Monday. Have a fine weekend Jesperby evalon - General New Machines Topics
Hi dekutree64, Thanks again for your relevant & helpful reply - I appreciate your feedback I will comment below but while I remember it: I noticed in the "screwstruder" thread that you had commented there: With this in mind - did you ever try out this extruder type yourself? And, if so, did you find it to be "excellent" - or did there appear to be maybe some "systematic" shortcomings? I mby evalon - General New Machines Topics
Hi both, & thanks for your relevant feedbacks. Well ... the thing is that I don't really seem to find the "right" solution within the constraints that I have time-wise & money-wise. The Sapphire Plus could be ideal but are e.g. the linear rails good enough to constitute the basis for upgrading? Also I have just learned that the firmware appears to be not too good (even in the current veby evalon - General New Machines Topics
Hi All, I have decided to enter the world of 3D printing but am a bit unsure of which of the many paths into 3D printing to choose. Thus, I am posting here - hoping that one of you may help narrow the scope of options ... ... As it is I built a CNC mill a couple of years ago which proved to be quite successful in that it holds a precision of ~3/1000mm within a square of 100x100mm and ~2/100by evalon - General New Machines Topics
Thanks Viktor ... BTW I didn't get an email that you had replied so have just seen your reply & link now. Will check it out ;-) Cheers, Jesperby evalon - Laser Cutter Working Group
Hi again Viktor, & thanks once more for your reply I've decided to try it out and would like to make sure that I have a quite powerful (yet not very expensive) diode to start out with. 445 nm probably is the most realistic wave length to use. Searching on the internet I notice that there are many vendors and models - but maybe you know of a "trusted" vendor and reliable diode model that -by evalon - Laser Cutter Working Group
... then on the other hand an NdYAG laser has a 1070 nm wavelength ??? (bottom of pdf - in the specs tables) ... It's (hopefully) not really an issue for me to build a simple pulsed electronics as long as I know which laser to use ... Greetings, Jesperby evalon - Laser Cutter Working Group
... QuoteWhat's the material of the 'gold leafs'? - if it's gold, then you'll need high power pulse-lasers ... either NdYAG with 10W CW / 10kW pulsed, or fiber-lasers with similar pulsed peak powers ... expect costs of some (ten-) thousands USD! ... It is gold but it's very, very thin. Typically 0.1 micron (1*10-7 meters). So I would guess that even if there is a bit of heat transfer within theby evalon - Laser Cutter Working Group
Hi Viktor, & thanks for your reply. QuoteWhile the peak power (=25Watt) sounds good, the averaged power (max. duty factor) is: 25W * 0.04% = 0.01 Watts or 10mW only! - I don't think, this is enough to affect the material eye rolling smiley This has been kind of my own thoughts which unfortunately means that I have a - temporarily - very powerful diode that I can't really use ... However,by evalon - Laser Cutter Working Group
QuoteStill working on an improved cutting surface, right now I have my cutting material right on top of a super-flat piece of MDF, but I think that using a 'honeycomb' kind of raster that allows air to be under the material might allow for better cutting. I also expect the cuts to be 'cleaner' as the laser doesn't bump onto an underlaying surface and thus heats up surrounding materials even more.by evalon - Laser Cutter Working Group
Hi all, I will shortly be cutting some gold leaf with a laser and wonder if I can use a 904 nm diode to do this? It would be "feasible" if this was possible as I already have a laser diode and it looks as if it is a quite powerful diode (LH163-20; datasheet here: ; 25 watts although with a duty factor of 0.04% ~1/2500 if used at 25 watts) ... Additionally I need the focus of the laser beam - orby evalon - Laser Cutter Working Group
Mkouri Wrote: ------------------------------------------------------- > I cannot answer your question, but you might want > to re-post it in a more active laser cutter > oriented forum, I recommend Hi Mkouri - thanks for the tip. I'll post it there too. Greetings, Jesperby evalon - Laser Cutter Working Group
Hello :-) I may soon be interested in cutting very fine tracks in gold leafs. The gold leaf itself is about .4 umeter thick (0.4*e-6meter) and I would like to cut very narrow tracks in a the gold leaf, e.g. 0.1 to 0.3 mm thick. Is this possible using a laser cutter - or maybe if you have another suggestion I'd appreciate your suggetion ... I've attached an image showing what I hope to make.by evalon - Laser Cutter Working Group
Hi - decided to cancel my question ... All the best, Jesperby evalon - Powder Printing and Selective Laser Sintering