Jig alignement and origins

[Mranaskw]

Hello guys

I'm having a brain storm trying to figure why after aligning a jig using utilities dialog box with specific origin for each axe the probe locates the auto vector when submitting a point coordinates , i mean its like that the machines knows where the part is while we have had only aligned the jig not the part , it is related to the origins yes but how does it work and one more important thing ,we always submit the specific origin in the negative way for ex (if X origin is 455 we must submit -455) why.

thank you in advance

[R2ah1ze1l]

Translations are allowed but NOT required. Example:
With Translations

READ_1     =FEAT/POINT,CARTESIAN
            THEO/<0,-11.915,9.64>,<0,0,1>
            ACTL/<27.5804,22.7525,-33.2671>,<0,0,1>
            READPOINT/

CSY_1        =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
                ALIGNMENT/TRANS,XAXIS,READ_1
                ALIGNMENT/TRANS,YAXIS,READ_1
                ALIGNMENT/TRANS,ZAXIS,READ_1
                ALIGNMENT/TRANS_OFFSET,YAXIS,11.915
                ALIGNMENT/TRANS_OFFSET,ZAXIS,-9.74
              ALIGNMENT/END

CIR_1        =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,IN,LEAST_SQR
              THEO/<0,0,9.55>,<0,0,1>,23.915
              ACTL/<-0.0236,-0.0677,9.55>,<0,0,1>,23.9771
              TARG/<0,0,9.55>,<0,0,1>
              START ANG=-92,END ANG=268
              ANGLE VEC=<1,0,0>
              DIRECTION=CCW
              SHOW FEATURE PARAMETERS=NO
              SHOW CONTACT PARAMETERS=YES
                NUMHITS=5,DEPTH=0,PITCH=0
                SAMPLE METHOD=SAMPLE_HITS
                SAMPLE HITS=0,SPACER=0
                AVOIDANCE MOVE=NO,DISTANCE=2
                FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
              SHOW HITS=NO

CSY_2        =ALIGNMENT/START,RECALL:CSY_1,LIST=YES
                ALIGNMENT/TRANS,XAXIS,CIR_1
                ALIGNMENT/TRANS,YAXIS,CIR_1
              ALIGNMENT/END

Without Translations

READ_1     =FEAT/POINT,CARTESIAN
            THEO/<0,-11.915,9.64>,<0,0,1>
            ACTL/<27.5804,22.7525,-33.2671>,<0,0,1>
            READPOINT/

CSY_1        =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
                ALIGNMENT/TRANS,XAXIS,READ_1
                ALIGNMENT/TRANS,YAXIS,READ_1
                ALIGNMENT/TRANS,ZAXIS,READ_1
              ALIGNMENT/END

CIR_1        =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,IN,LEAST_SQR
              THEO/<0,11.915,-0.19>,<0,0,1>,23.915
              ACTL/<-0.0236,11.8473,-0.19>,<0,0,1>,23.9771
              TARG/<0,11.915,-0.19>,<0,0,1>
              START ANG=-92,END ANG=268
              ANGLE VEC=<1,0,0>
              DIRECTION=CCW
              SHOW FEATURE PARAMETERS=NO
              SHOW CONTACT PARAMETERS=YES
                NUMHITS=5,DEPTH=0,PITCH=0
                SAMPLE METHOD=SAMPLE_HITS
                SAMPLE HITS=0,SPACER=0
                AVOIDANCE MOVE=NO,DISTANCE=2
                FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
              SHOW HITS=NO

CSY_2        =ALIGNMENT/START,RECALL:CSY_1,LIST=YES
                ALIGNMENT/TRANS,XAXIS,CIR_1
                ALIGNMENT/TRANS,YAXIS,CIR_1
              ALIGNMENT/END

Using translations to put things back to 0 is for programmer ease, but not required as seen above. CSY_2 will still result at the same XY origin for CIR_1 measurement.

[Mranaskw]

excuse me but what do you mean by translations, I'm confused :/ and cant follow up cuz i didn't mention it , how is it related to my inquiry if i might ask

[R2ah1ze1l]

Initial comment had more to do with how I read the last line of your post. The 455 away reporting as -455, that is potentially a translation issue.

The jig/part will be connected in a program based on your alignment recalls. If you programmed this 'offline' as the CMM collects the jigs data(not equal to offline position), it will shift your part to follow the offsets being found for your jig from home position on the CMM.