8031
General Mach Discussion / Re: Cut parts are wrong size, CNC knee mill problem
« on: July 26, 2012, 11:17:29 AM »
What are the steps per unit you have?
What line count are your encoders, you mentioned 4000 but not sure if that is the line count or the quadrature output?
What pitch are the ballscrews? I assume they will either be 5mm itch or 0.2inch pitch but will need to know.
With the above info I can calculate out as I will know roughly your gear ratio from your steps per unit and it is most likely that te gear ratio will be a round number. You could of course count the teeth on each piulley and get the ratio that way but if you let me know the above it should be straightforward. Measuring distance is ok but it will only be as good as your measuring . Even having good measuring gear will not be as accurate as calculating when you have good screws etc
Hood
Hood
What line count are your encoders, you mentioned 4000 but not sure if that is the line count or the quadrature output?
What pitch are the ballscrews? I assume they will either be 5mm itch or 0.2inch pitch but will need to know.
With the above info I can calculate out as I will know roughly your gear ratio from your steps per unit and it is most likely that te gear ratio will be a round number. You could of course count the teeth on each piulley and get the ratio that way but if you let me know the above it should be straightforward. Measuring distance is ok but it will only be as good as your measuring . Even having good measuring gear will not be as accurate as calculating when you have good screws etc
Hood
Hood