Variable/flow control question

[Sean Harris]

I have a part that needs to be "bin" sorted for matched assembly. ( Customer requirement ) I have 2 measured features that need to be sorted on each part. I have no Issues with assigning the variables and sorting for a single feature but I cannot figure out how to make this process work for 2.

Example- Part 1 dia1 meas .500 and dia2 meas .250 so part goes in "bin" 1
Part 2 dia1 meas .501 and dia2 meas .250 so part goes in "bin" 2
Part 3 dia1 meas .500 and dia2 meas .251 so part goes in "bin" 3

I cant seem to find any "If/And " type of statement, any suggestions?!?

[craiger_ny]

I'm not sure I understand what your sort criteria are. Are they sorted by DIA1 and DIA2 together or independently of each other?

Craig

[Jan d.]

Try something like this:

ASSIGN/V9 = (PNT4.Z+PNT5.Z+PNT6.Z)/3
            ASSIGN/V1 = (CIR3.DIAM-CIR3.TDIAM)*-.5
            ASSIGN/V2 = (CIR3.X-CIR3.TX)*-1
            ASSIGN/V3 = (CIR3.Y-CIR3.TY)*-1
            ASSIGN/V4 = (V9-PNT4.TZ)*1
            ASSIGN/V10 = PNT4.TZ
            ASSIGN/V5 = IF(ABS(V1)<0.0001,0,V1)
            ASSIGN/V6 = IF(ABS(V2)<0.0001,0,V2)
            ASSIGN/V7 = IF(ABS(V3)<0.0001,0,V3)
            ASSIGN/V8 = IF(ABS(V4)<0.0001,0,V4)

This ought to help.


Jan.

[Sean Harris]

The parts need to be sorted for both dimensions but the 2 dimensions have different criteria.

[craiger_ny]

So I'm thinking based on the dimensions for each you want to throw up a comment telling the operator what bin to place the part in? Am I following? If that is so, let us know the criteria and we'll see what we come up with.

Craig

[Duckhunter]

nested loops

Try something like this:

assign bin=o

if dia1.d =.500
if dia2.d = .250
assign bin=1
end if
end if

if dia1.d =.501
if dia2.d = .250
assign bin=2
end if
end if

if dia1.d =.500
if dia2.d = .251
assign bin=3
end if
end if
comment, report "Part belongs in bin: " + bin

[Sean Harris]

Yeah ultimatly we want the comment to pop on the bin number.

Tray A= Dia 1- .38350-.38385
Bin 1 in Tray A dia 2- .32530-.32535
bin 2 in tray A dia 2- .32535-.32565
bin 3 tray A dia 2- .32565-.32570

Tray B= Dia 1- .38385-.38415
Bin 1 in Tray B dia 2- .32530-.32535
bin 2 in tray B dia 2- .32535-.32565
bin 3 tray B dia 2- .32565-.32570

Tray C= Dia 1- .38415-.38420
Bin 1 in Tray C dia 2- .32530-.32535
bin 2 in tray C dia 2- .32535-.32565
bin 3 tray C dia 2- .32565-.32570

You dont need to tell me how crazy impossible these tolerances are, lol, we just shake our heads when we are asked to do these things.

[craiger_ny]

DIA1       =FEAT/CIRCLE,RECT,IN,LEAST_SQR
            THEO/0,0,0,0,0,1,0.3838
            ACTL/0,0,0,0,0,1,0.3838
            MEAS/CIRCLE,6,WORKPLANE
            HIT/BASIC,NORMAL,0.074,0,0,-1,0,0,0.074,0,0,USE THEO = YES
            HIT/BASIC,NORMAL,0.037,0.0641,0,-0.5,-0.8660254,0,0.037,0.0641,0,USE THEO = YES
            HIT/BASIC,NORMAL,-0.037,0.0641,0,0.5,-0.8660254,0,-0.037,0.0641,0,USE THEO = YES
            HIT/BASIC,NORMAL,-0.074,0,0,1,0,0,-0.074,0,0,USE THEO = YES
            HIT/BASIC,NORMAL,-0.037,-0.0641,0,0.5,0.8660254,0,-0.037,-0.0641,0,USE THEO = YES
            HIT/BASIC,NORMAL,0.037,-0.0641,0,-0.5,0.8660254,0,0.037,-0.0641,0,USE THEO = YES
            ENDMEAS/
            IF/DIA1.DIAM >= 0.3835 AND DIA1.DIAM <= 0.38385
            ASSIGN/TRAY = "TRAY A"
            END_IF/
            IF/DIA1.DIAM > 0.38385 AND DIA1.DIAM <= 0.38415
            ASSIGN/TRAY = "TRAY B"
            END_IF/
            IF/DIA1.DIAM > 0.38415 AND DIA1.DIAM <= 0.3842
            ASSIGN/TRAY = "TRAY C"
            END_IF/
            ELSE/
            ASSIGN/TRAY = "REJECT"
            END_ELSE/
DIA2       =FEAT/CIRCLE,RECT,IN,LEAST_SQR
            THEO/0,0,0,0,0,1,0.3838
            ACTL/0,0,0,0,0,1,0.3838
            MEAS/CIRCLE,6,WORKPLANE
            HIT/BASIC,NORMAL,0.074,0,0,-1,0,0,0.074,0,0,USE THEO = YES
            HIT/BASIC,NORMAL,0.037,0.0641,0,-0.5,-0.8660254,0,0.037,0.0641,0,USE THEO = YES
            HIT/BASIC,NORMAL,-0.037,0.0641,0,0.5,-0.8660254,0,-0.037,0.0641,0,USE THEO = YES
            HIT/BASIC,NORMAL,-0.074,0,0,1,0,0,-0.074,0,0,USE THEO = YES
            HIT/BASIC,NORMAL,-0.037,-0.0641,0,0.5,0.8660254,0,-0.037,-0.0641,0,USE THEO = YES
            HIT/BASIC,NORMAL,0.037,-0.0641,0,-0.5,0.8660254,0,0.037,-0.0641,0,USE THEO = YES
            ENDMEAS/
            IF/DIA2.DIAM >= 0.3253 AND DIA2.DIAM <= 0.32535
            ASSIGN/BIN = "BIN 1"
            END_IF/
            IF/DIA2.DIAM > 0.32535 AND DIA2.DIAM <= 0.32565
            ASSIGN/BIN = "BIN 2"
            END_IF/
            IF/DIA2.DIAM > 0.32565 AND DIA2.DIAM <= 0.3257
            ASSIGN/BIN = "BIN 3"
            END_IF/
            ELSE/
            ASSIGN/BIN = "REJECT"
            END_ELSE/
            IF/TRAY == "REJECT" OR BIN == "REJECT"
            COMMENT/OPER,NO,"PLACE THIS PART IN THE REJECT BIN"
            END_IF/
            ELSE/
            COMMENT/OPER,NO,"PLACE THIS PART IN " + TRAY + " " + BIN
            END_ELSE/

This is how I'd do it but not after explaining that this is utterly and absolutely unreasonable from a tolerance standpoint. You will not be accurate in sorting these with a CMM with these tolerances so this is just a show of code really, as applied it is worthless pratically. Good luck

Craig

[Sean Harris]

That looks like it will do exactly what I want. Thanks!

As for the tolerance issue .......well...... anyone, who knows anything, knows better. I guess Engineers and Estimators don't exactly fit that category.

[craiger_ny]

BTW you might not want to model your features after mine. I just created two circles wit 6 hits as an example. I have no idea what your part configuration will demand. This of course is aside from the tolerance issue............

Craig

[Sean Harris]

Yeah, the features aren't really circles n e way. Its actually a sphere rad and a cone crosssection. I just need to get the code written, what "they" do with it is someone elses problem.

Maybe when a new pmm-c gets here we can have better luck.