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Messages - sarhea75

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Hello, I am new to mach forum. I retrofitted a hurco Hawk machine with stepper motors due to the computer boards being bad in the machine when i got it. I have everything working correctly but i cannot get rpm to read on the spindle index. I am using the original proximity switch that they used for rpm. Now i have the readout to finally work but i only get 600 1200 1800 2400 ect. for rpm. all in 600 rpm increments. What is causing this to do this? I have tried spindle pulley ratio changes. Pulses per rev. changes. Just about everything i can think of but nothing changes the rpm. If i leave the spindle set at the same speed but make these changes the rpm readout does not change. Any ideas would be greatly appreciated.
Thanks

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