New spindle idea for my machine - DC 1HP

[irving2008]

Sounds like your pulse rate -> voltage conversion is not linear. According to the spindle2 manual its intended to be used at 2000 steps/min for 10v and tweaked using the adjustment on the board to get this spot on. I suspect your starting point of 1000 is too low and at 500ppm the board is having difficulty adjusting to it...

[John S]

To adjust these correctly you need a special screwdriver shaped like Roy Harding.

[HiltonSteve]

Thanks for that Irving, seems like you were on the right track.

Seems that the steps/unit and velocity were linked (which makes sense), if I increased the steps to 2000 then I had to decrease the velocity to 65 to give me 10V at full speed which releated to my original 1000steps/130 velocity. This still did not give me 5V at half speed, still the same 5.7 as before.

But....

I have increased the pulse width from my original setting of 1 up to 10 and now it is giving me a much better linear relationship. Now have 10.00V at full speed and 5.01V at half speed.

Increasing the pulse width to 10 effects all the motor settings, what effect will it have on the steppers if any at all?? Everything seems to be running fine still.

Thanks again