Quote Originally Posted by EddyCurrent View Post
This is probably nothing to do with it but I'll mention it anyway.
When I first powered up my system, 4 x AM882 and CNC4YOU Nema23 4Nm motors, it sounded like a load of whales singing from one particular driver and the motor was noisy when running. I thought it was goosed so I tried another motor on it with the same result. There is a utility with the AM882's called Protune and I had been playing with this connected to one of the drivers via a special cable (connections available on Leadshine website to make one). I therefore connected the noisy driver to Protune and ran the Auto Current Tuning section, immediately no more whale song and motor nice and quite when running. Without looking at the manual for your drivers I don't know if this utility is relevant but it shows that something on the current side was having a huge effect on motor noise.
Nice feeling isn't it Eddy knowing you can deal with almost anything the machine throws at your drives/motors. This alone justifies the extra cost IMO not to mention the far smoother motor operation than analogue drives.

Birchy if you do end up buying new drives then the AM882 is the drive if your having Resonance problems because you can adjust the Resonance range the drive covers with Pro tune. Your Analogue drives are stuck to set range which is narrow and if indeed it is resonance then your drives Resonance algorithms are not looking in that range or even working at all.?

The Dampers you see are usually only affective on cheap drives that don't have any resonance handling capability and I'm sure the M542 does have some basic capability and although it may only be basic it's better than none.?

Regards Micro stepping then above 2000 is generally pointless has the motors can't resolve much more than that and your only stressing the machine and increasing chance of dropped pulses/steps etc.
Higher MS does help with smoother motors and I generally prefer 2000 if the PC/Parallel port can handle it but anywhere above 800 generally works ok.