Project: DEIMOS
Stage: Grating Slide
ID #: KDGS-001A
Engineer: J. Osborne

Mechanical Description of Stage: Delivers one of four items: 3 gratings and one mirror.  Has a 200 pound counterweight moving on it's own linear stage.

Electronic Description of Stage:

Required setting accuracy: TBD but we assume about 0.006"

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:  Motor and belt/sprocket reduction: 72 teeth/16 teeth plus
• spur gear set reduction of 69 teeth/16 teeth plus ballscrew  at 5 threads per inch (5TPI).
•     72/16 X 69/16 = R = 19.40625
•     1 rev of ballscrew = 0.20 inches
•     1 rev of motor = 0.0103 inches
•     4000 counts/rev = 0.0000025 inches/count

• Backlash:
• Forward:
• Reverse:

• Repeatability:
• Forward:
• Reverse:
• Fiducial:
• Type:
• Location:
• Encoder:
• On motor:
• On stage:
• Air Cylinders:
• Air Solenoids:
• Air pressure:

NOTES:

Electronic Drawing(s) #EL-3066

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.