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Measuring step height

*...*
I have a Visio 300
PC-DMIS 4.3
I set up 2 gage blocks side by side 1 .600" and 1 .550"
I measured a the top of the .600" block with an auto focus point max zoom
set the (Z) origin to that point
measured the same point 10 times and got a range of .00222"
did the same on the .550" block and got a range of .00247"
I don't understand I feel this should be more accurate than this.
Does anyone have any settings suggestions that I can try?
Thanks
Parents
  • Gage blocks are shiny are they not?
    Also tested these:
    plastic .00216 range
    phenolic .00249 range
    steel grind finish .0025 range
    steel tumbled finish .00379 range
    steel lapped finish .00216 range
    brass turned finish .00242

    TOP SURFACE=FEAT/VISION/SURFACE POINT,CARTESIAN
    THEO/<0,0,0>,<0,0,1>
    ACTL/<0.00201,0.00131,0.00084>,<0,0,1>
    TARG/<0,0,0>,<0,0,1>
    SNAP=NO
    SHOW FEATURE PARAMETERS=NO
    SHOW_VISION_PARAMETERS=YES
    TYPE=AUTOMATIC HIT TARGET
    MAGNIFICATION=4.51213
    HIT TARGET COLOR=WHITE,NOMINAL COLOR=GREEN
    HIT TARGET=SA1,YES,0.01721,0.01525
    FOCUS=FULL,0.4,NO,6,NONE,NO,TOP LIGHT [OFF] : BOTTOM LIGHT [OFF] : RING
    LIGHT [ON:89%{1111}]
    DIM LOC1= LOCATION OF POINT TOP SURFACE UNITS=IN ,$
    GRAPH=OFF TEXT=OFF MULT=200.00 OUTPUT=BOTH
    AX NOMINAL MEAS
    X 0.00000 0.00201 ----#---
    Y 0.00000 0.00131 ----#---
    Z 0.00000 0.00084 ----#---
    END OF DIMENSION LOC1
Reply
  • Gage blocks are shiny are they not?
    Also tested these:
    plastic .00216 range
    phenolic .00249 range
    steel grind finish .0025 range
    steel tumbled finish .00379 range
    steel lapped finish .00216 range
    brass turned finish .00242

    TOP SURFACE=FEAT/VISION/SURFACE POINT,CARTESIAN
    THEO/<0,0,0>,<0,0,1>
    ACTL/<0.00201,0.00131,0.00084>,<0,0,1>
    TARG/<0,0,0>,<0,0,1>
    SNAP=NO
    SHOW FEATURE PARAMETERS=NO
    SHOW_VISION_PARAMETERS=YES
    TYPE=AUTOMATIC HIT TARGET
    MAGNIFICATION=4.51213
    HIT TARGET COLOR=WHITE,NOMINAL COLOR=GREEN
    HIT TARGET=SA1,YES,0.01721,0.01525
    FOCUS=FULL,0.4,NO,6,NONE,NO,TOP LIGHT [OFF] : BOTTOM LIGHT [OFF] : RING
    LIGHT [ON:89%{1111}]
    DIM LOC1= LOCATION OF POINT TOP SURFACE UNITS=IN ,$
    GRAPH=OFF TEXT=OFF MULT=200.00 OUTPUT=BOTH
    AX NOMINAL MEAS
    X 0.00000 0.00201 ----#---
    Y 0.00000 0.00131 ----#---
    Z 0.00000 0.00084 ----#---
    END OF DIMENSION LOC1
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