Section 6.6 of the manual suggests that is the VFD’s “Set Frequency (Hz)” (1/60 of the set speed 8,000 - 24,000 RPM). Carbide 3D support should be able to verify that. 
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Section 6.6 of the manual suggests that is the VFD’s “Set Frequency (Hz)” (1/60 of the set speed 8,000 - 24,000 RPM). Carbide 3D support should be able to verify that.