I recently upgraded both X and Y axis stepper drivers on the Openbuilds MiniMill to Leadshine DM856 drivers. I will not be milling or running the machine regularly at these higher speeds as the stepper motors have very little torque at higher RPMs, but it is always fun to see how fast they can go. The new Leadshine drivers have proven to be a great improvement over the TB6600 drivers and I would recommend anyone searching for a good stepper driver to consider these.
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