I am working on a project to build a SLS printer. While searching for a galvo setup for my machine, most of them were meant for laser projectors(stage lighting). Can we use these galvos for SLS? I plan on using a 40W CO2 laser for the sintering. Can anyone please help me in this matter? Most of the galvos in the net are too expensive, it would be really helpful if anyone could me some links where I can find some inexpensive galvo setup.
... beginning of the year I've programmed a plugin-DLL for BeamConstruct, using a cheap laser projector galvo-head with Easylase LC USB as DAC - [www.mylaserpage.de]
But the size of the applyable mirrors was not sufficient for powers grater 15 Watts NIR (975nm and 1070nm), so I've changed the setup to servo-motors instead af galvos and mirror sizes of 40x40x6mm for use with a 80Watt fiberlaser, but here I'm using a modified CNC-software instead of the DLL's.
Both solutions are not OS, so I can't provide further links or infos for them, sorry
Reportedly, you don't need much power to sinter nylon, if you heat the nylon to the edge of its melting point inside the build chamber, you only need a couple of watts. If you do some further reading you will find this mentioned.
Is there any particular reason things cannot be kept simple by using, say a 10:1 (or similar) pulley ratio is used to drive the mirror shaft with a stepper motor? Also is focal length going to be an issue when using a co2 laser?
... if you'll want reasonable speed and accuracy, then a stepper motor won't be the best alternative - better use a higher geared (brushed) DC or BLDC servo motor ... but not the RC-plane types! - they won't be precise enough ...