Converts step frequency input to 0-10V DC analog output for VFD compatibility, enabling automated spindle speed control
Onboard relays provide direction and enable/disable control for spindle operation, simplifying wiring and control logic
Optoisolated analog outputs protect the CNC controller from electrical noise and ground issues
RJ45 connector allows fast, standard wiring with compatible CNC4PC boards and parallel port setups
Supports both Mach-style and Ethernet SmoothStepper ESS setups for versatile integration
Summarized by Shop
C6 Variable Speed Control Board
The C6 Variable Speed Control Board allows your CNC control system to control spindle speed using step and direction signals, similar to how an axis motor is controlled. The board converts the incoming step/frequency signal into a 0–10VDC analog output, which is commonly used by VFDs and spindle
Analog Output
0-10V DC (on-state)
Input Voltage
2.5V DC minimum
Input Current
16mA max (on-state)
Maximum Operating Frequency
50kHz
Relay 1
AC load 7A 240VAC, 10A 125VAC; Relay 2: DC load 15A 24VDC, 10A 28VDC