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General Mach Discussion / Re: spindle load feedback to mach3
« on: July 19, 2013, 04:11:55 AM »
I am not sure about VFD's but servo drives often have an analogue output that you can set up to be used for different things. I have mine set up on the big lathe to look at spindle current and I have it scaled in the servo drives setup such that 10v is 150% of continuous rated current of the motor thus I have 0-150% load meter. I used an analogue ammeter with centre zero and made a scale up for it to represent 150% - 0 -150% and it works great, I used a fixed resistor and a trimpot to allow me to adjust it slightly to get true zero. I will take a pic later to show it. Oh and the reason I have the centre zero is the analogue out from my servo is +/- 10v rather than just 0-10v so if the spindle is M4 it will show deflection as the opposite way.
Hood
Hood