Very cool! Excellent find. I really like the patterns you show.
Very cool! Excellent find. I really like the patterns you show.
If you're the smartest person in the room, then you're in the wrong room.
You might try putting a positive lens between the dimpled sphere and the laser to focus the beam to be smaller entering the sphere. It might make things less busy.
"There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso
Laserium used a microscope stage with a closed loop circuit driving the motor to match a pot on the control panel. The stage moved a incoherent fiber bundle that projected light through a 5 position turret.
Ion lasers had small enough beams that lenses were only used for the "burn wheel" and feeding the Lumia wheel that fed the fiber bundle.
I have an unfinished RGB panel that has a separate beam torquer galvo for each color and a separate focusing device for each color made up of a stationary lens and a stepper driven stage with a second lens. (Sometimes I get a little carried away...)
"There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso
I forgot to mention I was also playing with some cylindrical lenses I harvested from an old laser printer...
The linear stages were salvaged from Zeiss confocal microscopes I assume they were removed as part of an upgrade. (They were sold as part of a package with a CT6200 scanner and a little scan amp.) The box with the three EM20's was made out of a square piece of extrusion. It may not be clear in the photo that the EM20's are on a plate that pivots on pins in the axis perpendicular to the galvo axis for initial alignment. The scanner can be offset to complete the alignment. The MM1's are also part of the alignment.
It was pre-pandemic and it's been sitting on a shelf.
Last edited by laserist; 10-14-2022 at 12:27.
"There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso
"There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso
Yes it's my design.
I picked up an earlier version of this on ebay:
It was busted up in transit a bit, but I tossed the original electronics and rebuilt it using Mach3 and 3 really sweet micro-stepping drivers. It's slow but accurate. Some day I'll replace the NEMA17 steppers with NEMA23's and gecko drivers, it needs more torque to run much faster reliably, but there are always limits. The newer version of the mill used a different type of "stepper" technology, (flat disk something or another...) but they dropped pulses when I tried them on my machine. Which is a major flaw in a stepper driven machine.
Last edited by laserist; 10-14-2022 at 12:28.
"There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso
I managed to save the Datronik club projector. I'm looking for glass like in the photo, it's a beautiful effect. I don't want to take it off the projector and put it on another projector. Does anyone know about this glass, where I could get it.