We have been struggling to get our 4 x 8 foot flat bed laser to cut consistently over the entire bed surface. We thought we had it aligned and focused perfectly but when we went to run a test pattern this terrible noise occurred. When this happened before we lost the key in the drive pulley for the X axis (x being the laser head) After the noise and a terrible cut...we rechecked alignment. The 1st and 2nd mirrors are dead center...but the 3rd mirror alignment has shifted.
This is a link to a video of the noise. CNC Laser Head Axis Noise - YouTube
It only occurs when the machine comes out of datum...Also the datum is much "deeper" in the corner then when we move the machine manually. This is a new Chinese laser with LaserCut 5.3 software and the standard Chinese controller.
When we lost the key before the axis overran the limit switch...ruined it and the laser head block was damaged. Both parts were replaced and now we are getting the noise again.
It does not make any sense that this would cause the alignment to get messed up but it must be...any ideas of what is going on? or what we should be checking?