[john-100]

which Breakout Board are you using ?

some require a regulated 10V supply for the PWM to analogue converter

others have an onboard regulator to reduce a 12 to 24V DC supply to the 10V

a few BOB's have a potentiometer to adjust the PWM converters analogue output

like the C6 board from CNC4PC for example
http://www.cnc4pc.com/Tech_Docs/C6R6_User_Manual.pdf


John

[maxspongebob]

The ESS only puts out a 5 volt PWM signal. Your speed controller has to convert that to 0-10 Volts DC. Usually there is a potentiometer on the speed controller that lets you adjust the output voltage. You should tell us what you have wired in between the ESS and the Spindle motor.

[dtimes]

The board I am using now is a C69 from cnc4pc. The trim pot is up to max already. I think given that both controllers I tried gave the same result, the problem may be further up the control chain. Maybe an ESS setting ??

[mactec54]

The board I am using now is a C69 from cnc4pc. The trim pot is up to max already. I think given that both controllers I tried gave the same result, the problem may be further up the control chain. Maybe an ESS setting ??

Going to a higher voltage won't change anything unless the 12v supply is not giving you 12v

Depending on your VFD some can use 0-5v or 0-10v so if you post what VFD Drive you have I may have the fix for you as long as you can get it down to 0-5v then this will work the same a 0-10v if your VFD Drive supports 0-5v