Project: DEIMOS
Stage: Grating Tilt #4
ID #: KDGC-004A
Engineer: J. Osborne

Mechanical Description of Stage: 6" X 8" grating rotator. Tilt angle is maintained even when out of position. (e.g. no "Home"-ing required.)

Electronic Description of Stage:

Required setting accuracy: Sub arc-second!

1. Speed, temperature, accuracies, electrical power, pressurized air, lubricant, coolant, N2 purge, ...
2. Primary (inner) and secondary (outer) limits. These can be magnetic, optical, or physical contact

1. Uphill defined as motor (or driven end of shaft) in lowest position

1. "Coarse" if from optical interupter, "Fine" if from an encoder index pulse. Home is defined as zero counts.
2. Primary limits signal the controller to stop motion. Secondary limits cut motor power and require intervention to move out of them.

• Gear reduction function: Two stages of friction drive plus timing belt and sprocket:  923.9 X 60/24 = 2309.75

• Backlash:
• Forward:
• Reverse:

• Repeatability:
• Forward:
• Reverse:
• Fiducial:
• Type: Optical
• Location:
• Encoder:
• On motor: Zero to 40,000 and back = 0 extra counts.
• On stage: Gurley lost 3 counts on above test.
• Air Cylinders:
• Air Solenoids:
• Air pressure:

NOTES:

Electronic Drawing(s) #EL-3064 and EL-3065

Sign conventions are such that a positive motion of the motor turns the motor in a CW direction as viewed from the drive shaft looking back into the motor, and will drive the stage towards the forward limit.