[jamieyoung]

hello i am trying to connect the mk3/4 output board to a vfd using the pwm output (pin 6)
the problem is at 0% the output is 0v then at 1% its 10v.

is there a setti9ng im missing.

the spindle settings are set to speed pin 6 and to use pwm

any help is great thank you

[Al_The_Man]

PWM and -10v (analogue) are two different methods completely..

[RaderSidetrack]

hello i am trying to connect the mk3/4 output board to a vfd using the pwm output (pin 6)
the problem is at 0% the output is 0v then at 1% its 10v.

is there a setti9ng im missing.

the spindle settings are set to speed pin 6 and to use pwm

Perhaps you overlooked the 'Frequency' checkbox?

See: https://cnc.zone/hardware/accesories/acces-ob34

... and this image in particular:

[PlanetCNC]

Here is a tutorial:
https://cnc.zone/hardware/accesories/acces-ob34

[jamieyoung]

thanks ,i will try this , how would i find out frequency and step width.

i got the machine second hand and am upgrading it ,i upgraded the control bourd to the mk3/4 and set it up the same as the old one, same settings and wiring but the vfd and limits are stumping me

[PlanetCNC]

Tutorial shows that “Frequency” is selected and set to 1500 and that “Step Width” is zero.