Hi everyone I am using a VFD and spindle controlled via openbuilds control software. However I am using a cnc xpro v2 not a blackbox. The xpro has a 0-5v output for the spindle not a 0-10v like the blackbox so when I turn on the spindle to back I am only getting 12k rpm instead of 24k. Is there a way to tell the openbuilds control software to only expect 0-5v instead of 0-10v? Thanks,
software cannot transform 5v into 10v, hardware has to do that, which is what the Blackbox has. the VFD may have a setting that allows it to work with a 5v input, should be in the manual.
Thanks yes I know software can't change the voltage. But the control software sends a signal Thanks I found it I had one setting backwards
ah yes, settings $30 and $31 default to 1000 and 0. This means M3 S1000 would do full output (5v on your controller) M3 S500 would do 2.5v (or 50% on PWM really) and S0 will be 0v. if your spindle can do a maximum of 30000RPM and you want to have sensible numbers in CAM then you set $30=30000 and it will scale the S0 to S30000 to the 0 to 5v PWM signal. How accurate the actual RPM will be depends on the VFD itself and how it is set up. excellent, VFD's are complex and have settings for most things, can be tricky to find though
