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General Mach Discussion / Re: A axis trouble calculating help!.
« on: March 21, 2012, 10:45:10 PM »
Lindsay,
The caluculated steps per degree for A is correct. Make sure you remove any backlash before rotating the A when checking. You may need to refine if the gear reducer is not exactly 50:1 reduction. For an indicator to check you just measure the table, say 6" dia,
then 3.14(6)=18.85" circ x 1/360=.052" for 1 deg .026" for 30' .013" for 15' etc.
So with a small pencil line away from zero mark you can refine quickly. Also do more than one revolution as number of steps your off
will multiply.
RICH
The caluculated steps per degree for A is correct. Make sure you remove any backlash before rotating the A when checking. You may need to refine if the gear reducer is not exactly 50:1 reduction. For an indicator to check you just measure the table, say 6" dia,
then 3.14(6)=18.85" circ x 1/360=.052" for 1 deg .026" for 30' .013" for 15' etc.
So with a small pencil line away from zero mark you can refine quickly. Also do more than one revolution as number of steps your off
will multiply.
RICH