Angles?

[Underspec]

I'm trying to measure draft inside of a diameter. I've tried using a cone autofeature but it's giving me a error best fit calc. Using two circles is not working for a constructed cone. Any ideas?

[Jeffrey Lovely]

Try 3

[bw_bob]

One thing you could do is make the diameter zero. Then measure points @ bottom & top of wall & construst line. Just a thought

[#2#]

Did you try using a learned feature. I'd try that with 3 levels. See what it comes up with. If it is a shallow angle it will probably guess it as a cylinder. Go edit-overide guess and choose cone. Then, look at it to make sure it has the vector correct.

Call it a day and worry about it on monday? Only ideas I've got.

[JoeRZ]

Try

Have to use other means - other than CMM...

Taper formula - measure top dia, measure bottom dia, find the length and do trig it will give you per side.

Just my 0.02

I am so outta here!!! Have a good T-day...

JRZ

[Peter Warcholyk]

What about making a mold, then verifying on an optical comparator?

ZydecoPete

[kpayne]

Draft Angles

I measure a lot of plastic parts and I find any drafted holes or bosses 1 degree or less are difficult to use auto cone to measure. For this application I would measure top and bottom diameters, assign variables, calculated draft angle, create generic cone and then report draft angle.

Kevin


ASSIGN/V1 = RAD2DEG(ATAN((CIR1_MDFT.R-CIR1.R)/(CIR1.Z-CIR1_MDFT.Z)))
F1 =GENERIC/CONE,DEPENDENT,RECT,OUT,$
NOM/XYZ,0,0,0,$
MEAS/XYZ,0,0,0,$
NOM/IJK,0,0,1,$
MEAS/IJK,0,0,1,$
DISTANCE/0,0,$
ANGLE/-1,V1
DIM DFT_ANG1= LOCATION OF CONE F1 UNITS=MM ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL +TOL -TOL MEAS MAX MIN DEV OUTTOL
A -1.000 0.500 0.500 -1.003 -1.003 -1.003 -0.003 0.000 #
END OF DIMENSION DFT_ANG1

[cmmguy]

Nice Solution!

[Andrew Gardner]

Because I'm still using 3.2063, with no autocone feature, I manually create a cone with min of 9 points, then dimension the angle.