Thought I'd share our fun little project we started this evening with you guys.
Here's some
Pictures of the start of the project.
A friend has an old (circa 1994) Universal brand 50W laser that he used in his shop up until 2006, when the brains released the magical blue smoke. Problem was, he bought thier #2 prototype for that model, and they told him no luck with support or parts etc... for it. Sooo, he pulled it out of service and stuck it in the corner of his shop. Well, last night we had our makersapce meeting at his place, and guess what I found hiding! We popped the hood, pulled some wires and access covers, and here it is, one day later, the old brains have been removed, new RAMPS 1.4 getting wired up and we're gonna have some fun!
Hopefully, we'll have motion tomorrow morning, the X/Y axes are driven by standard NEMA 17's, and if they are DOA, we have plenty around to swap with. The machine right now has a manual Z adjuster, you would use a piece set on top of your part to laser, and crank it up until the piece was just at the lens surface (LOL), well, it already has the complete leadscrew mechanism for driving the table up/down with the handle, so off with the handle, on with another stepper. Also, origionally it had a constant speed rotary axis, but it was driven by a NEMA 17, presumably for exact speed of rotation, but it couldn't index to set positions. Well, it can now!
The only issue I can see at the moment is the laser tube (synrad 50Watt) has a BNC connector that used to plug into the origional boards, that at the other end, splits into two 1/8" audio style male connectors. I'm trying to find some docs on the tube. The only thing we found tonight was that their new tubes have a BNC connector that drives the tubes duty cycle (0-100%, so 0-255PWM). There's a solid state relay between the power supply and the laser tube's positive line, and it should do the switching fast enough right? Or, are they "arming" (lol) the laser with the relay, and firing via the BNC connector with the PWM, or is the laser powered on with the relay, and then it's interupted via pwm on the BNC connector?I'm sure I'll find something on here, but as most commercial laser equip. goes, they seem to be pretty hush about how to hack it? No fair!
If anyone knows, drop me a line on here, I'd gladly appreciate anyone's input