You need a constant torque, sensor-less vector version, as opposed to a V/F type, more suitable for fan applications etc.
Al.
Constant Torque vs Variable Torque VDF
What kind of VDF should i buy for my cnc mill. I will be milling aluminum
Should i buy a constant Torque or a Variable Torque
Here are the two options i was thinking. Spindle suggestions would be great too
WJ200-022SF 3HP 2.2kW 230V Single Phase Input VFD - Hitachi
WJ200-022SF: Constant Torque, Sensorless Vector, Single Phase In
NES1-022SB: Variable Torque Hitachi 3 HP, 2.2 kW, VFD
VFD NES1-022SB, AC Motor Drive
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Re: Constant Torque vs Variable Torque VDF
You need a constant torque, sensor-less vector version, as opposed to a V/F type, more suitable for fan applications etc.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Re: Constant Torque vs Variable Torque VDF
Assuming you are talking about a CNC mill and not a router with a high speed spindle, go with the sensorless vector VFD, will give you a nearly flat torque curve from 0 to the motor base RPM (1800?) and constant HP above that.
If you are talking about an inexpensive router spindle (~20,000 RPM), then the sensorless vector VFD might work well, but you can't run them below about 14,000 or so without overheating.
Jim Dawson
Sandy, Oregon, USA
