@Kyfe That’s good to know, Kyle. I tested my laser with two different Long Mill controllers and the results were the same. I figured - maybe wrongly - that the chances of two LM controllers being bad were less than the chance that the laser driver was bad.
Also, others here are getting correct results with their lasers and the LM controller, so I know that it is possible to make this work.
Like you, I only have a multimeter to test output. From reading, ideally we need an oscilloscope.
@chrismakesstuff Any thoughts, Chris?