I'm having trouble getting the infrared laser to work with the RA2.  I get nice results on a flat surface but not with RA2.   To test the problem I mounted a cylindrical object on RA2 but not plugged in the RA2 and ran a test file as engraving on flat surface.  Results were good.  Then, I replaced motor cable with RA2 cable and ran the same file with same settings on same cylindrical object still mounted to the RA2 and did not change the focus position.  This time both speed and power were significantly reduced enough that I could not see engraving.  Am I forgetting something?

Thanks