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Fixed Rad Question

**Solved**

Ran program online using fixed rad method, the "code" method I posted below, and using "Relative To" (suggested by ).

All correlated w/in 0.0002.

Will be using the code method I posted below. Thanks all for the help!






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When I need to measure a small arc, I use the fixed rad & origin method that is detailed in the help file.

Is it frowned upon or less accurate for any reason to do this instead?-->
CIR6       =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,FIXED_RAD
            THEO/<0.026564,-0.046011,-0.015>,<0,0,1>,0.038157,0
            ACTL/<0.02656,-0.046003,-0.015>,<0,0,1>,0.038157,0
            TARG/<0.02656,-0.046003,-0.015>,<0,0,1>
            START ANG=120,END ANG=60
            ANGLE VEC=<0.8660254,0.5,0>
            DIRECTION=CW
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=NO
CIR7       =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR
            THEO/<CIR6.X,CIR6.Y,CIR6.Z>,<0,0,1>,0.038157,0
            ACTL/<0.02656,-0.046003,-0.015>,<0,0,1>,0.038157,0
            TARG/<CIR6.X,CIR6.Y,CIR6.Z>,<0,0,1>
            START ANG=60,END ANG=120
            ANGLE VEC=<0.8660254,0.5,0>
            DIRECTION=CCW
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=NO



Parents
  • Super old post I know that I am digging out here but I would like to know if this method is indeed working. I have a small arc 45degs of an R4.5 fillet to measure (only care for its coordinates) and I am seeing huge dispersion. The question is... probing a fixed rad there and using its XYZ values as DAN suggested for a new probing of a LS circle would it improve anything? Anyone tried this already?
  • I've used the original practice displayed many times. Never thought about 'relative to' as an option myself. It has greatly improved repeatability in measuring partial arc locations at my shop. I'd add that I reduce the FR arc angle by 5-10 deg from what I plan to measure with the LS feature.
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