Surveying the tertiary
01may04
01may04 tertiary survey
Alfa was installed on 21apr04. The tertiary was resurveyed
by lynn baker and ellen howell on 01may04. Only 2 paddles were used (the
other had be bumped when re enforcing the turret.
The survey was done with the design files relative
to the P3 rotation
points of the tertiary. This separated out the rotation and translation
better than the dome center line origin. The offsets used were:
dsnModX= dsnX + 204. inches
dsnModZ= dsnZ + 385. inches
The ter actuators get shorter as you increase the encoder:
+ encoder hor moves away from secondary (-x dome centerline)
+ encoder ver moves up.
The measurements were:
-
In VxWorks: addprocdir ter &addprocdir ter/terfoc & terposinit
-
start at orig: 573035 549794 480800 456040 517300
-
Lynn measures -.77 x, -.16z .. inches correction to make (ignore tilt).
-
slewoff -.16 .77 0. (ver hor tilt) .. move to new position
-
pnt ter query .. get new position call P1
-
teroffToEncDc enc 0. 0. .031 (computer .031 angle rotation)
about initial orig
-
print enc ..
-
idl.. oldTail=517300; newTail= last of enc above; dif=oldTail-newTail;
P2=P1+[0,0,0,0,dif]
-
pnt ter slew p2 list each element....
Tertiary survey results
tertiary survey results Tertiary encoder and potentiometer
values
| date |
verL |
verR |
horL |
horR |
tilt |
notes |
09apr04 enc
pot |
573035
1340 |
549794
1237 |
480800
845 |
456040
638 |
517300
1092 |
|
01may04 enc
pot |
568972
1322 |
545730
1218 |
496202
979 |
471439
768 |
519084
1096 |
|
Survey notes:
-
09apr04 after kevlar cables installed before alfa
-
01may04 after alfa installed.
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