The DMM products were good performers. My issue with their drives is that they are not resettable from a fault without powering down and restarting. This is not acceptable for a machine tool where doing so requires re homing the machine, which may or may not be possible depending on what kind of fixtures and workpiece are in place.
DMM is primarily interested in OEM produsts like printers and other single purpose machines that are designed, tested and intended to do a specific predictable operation over and over and their policy is that their drives do not need to be resettable if the machine they used on 'is properly designed'. The same is true for their AC drives, so I did not go forward with evaluating those products.
Frankly, I found this attitude to be not only condescending on its face, but indicates a complete lack of understanding of the needs and function of CNC machine tools.
So my opinion is that DMM has well engineered products for *some* applications . . but CNC machine tools is not one of them. This comment is based upon their attitude and statements at the time of the review. They may have changed this policy in the interim, so a visit to their site and perhaps some question to their tech support would be in order for anyone contemplating using these products on a machine tools, robotics, or other 'general purpose' CNC application.
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