Fanuc servo

[Al_The_Man]

Is there a spec sheet for details on the Granite drives?
What is the max size servo? As I believe it will operate Fanuc RedCap motors?
But most Fanuc are above 1kw.
Do they operate with a +-10vdc analogue?
Al.

[H.O]

Hi Al,

This is cut'n'paste from Granite Devices web-site.

DC bus supply voltage 24-200 Vdc Peak output current 15.0 A (¹ Maximum stall current 10.0 A (¹ Field oriented flux vector control for higher bandwidth Position, velocity and torque modes Supported motors: permanent magnet DC, AC (sinusoidal) AC servo motor phasing without hall sensors Quadrature encoder feedback (differential line outputs) Command inputs: step/direction pulses and serial commands via SPI bus Fully optoisolated command I/O Firmware field upgrades PC software based tuning Arbitrary ratio input command scaling and gearing Trajectory planner with tunable velocity/acceleration limits Acceleration and velocity feedforwards Soft recovery from following error Separate supply terminals for logic and high voltage No loss of position on high voltage outage Typical efficiency of 95% at full power

There's also a manual and other documentation available for download. Analog command isn't mentioned anywhere, "only" Step/Dir, PWM and SPI.

HTH
/Henrik.

[Xerxes]

Thanks Henrik!

Fanucs work fine if there is normal differential output encoder signals available. Some limitations in torque/speed may apply if motor current/voltage is beyond VSD-A rating.

Analog input is not present in VSD-A but will be in VSD-E.