VFD

VFD

The space currently has 2 Variable Frequency Drives; these magic boxes provide 3 phase AC power to 3 phase motors from the single phase mains of the space.

Machines that use a VFD

• The power saw has a HYOD
• The CNC Mill has a newer HYOD.

VFD Control

The power saw VFD doesn't really need settings changing for normal operation.

The CNC Mill controller interfaces with the CNC Mill VFD through PWM (0-10v) to adjust things like spindle speed, and direction.

VFD Parameters

Most VFD have a set of around 500 PD values that allow you to change settings on the unit (such as drive frequency); changes to these PD values can fry motors and/or the VFD. These PD values should only need to be set once, tailored to the application for the VFD and never would normally need to be changed by anyone but a service engineer.

CNC MILL VFD parameters

• PD005 - 400
• PD004 - 400
• PD003 - 400
• PD006 - 2.5
• PD007 - 1.20
• PD008 - 220
• PD009 - 15
• PD011 - 0

PD011 is the minimum frequency, below 120 (6000 rpm) it would cause non-water cooled spindles to burn up and generally has much less torque.