Re: Recommended DAC please?
I think you can use the PWM output from mach3, possibly with a capacitor/resistor to smooth it. Use the input for the potentiometer on the VFD.
Worth trying before buying anything?
Re: Recommended DAC please?
Jonathan that is a way i would prefer not to go and would rather use a dedicated DAC for the job. I would stll use pwm control settings in EMC2
Re: Recommended DAC please?
There's an option on the VFD to read 3 digital inputs to give 8 different speeds. If you've got enough I/O (i.e. another parallel port) then that could work. Might take a bit of fiddling to get EMC to provide the correct outputs? Not sure...
Re: Recommended DAC please?
Yes i have the same but would feel better about using ramp control of the spindle. This way i would ever need to remember top and bottom speeds.
Re: Recommended DAC please?
Most VFDs I've seen require 0-10VDC on the potentiometer terminals, but check your manual to be sure.
What you need is something like the Spindle V3 from diycnc.
Re: Recommended DAC please?
This is practically the same as the one i was looking for, the only difference was the price £10 instead of £21 with free p&p. The option for now is o just wire manual controls up and build my own circuit. I've just ordered another Par card so that i can dedicate the pins for external controls etc in a single package. we will see where we go from there.
cheers guys
Paul
Re: Recommended DAC please?
I just done a bit searching, and it would appear from a couple references, that the older spindleV2 board was cheaper.
Re: Recommended DAC please?
Is it worth mentioning that a DAC is a simple resistor ladder, ADC's are the tricky blighters :whistling:
Re: Recommended DAC please?
LOL! normally harder to climb ;-)