Last updated: 10-14-99

Project: DEIMOS
Stage: Grating stage clamp
ID #: KDGS-002A
Engineer: J. Osborne


Mechanical Description of Stage: This stage is an integral part of the Grating Slide Stage (KDGS-001A) but complex enough to call it a stage.  It takes a rotator and clamps it to the support structure. All work air cylinder mechanisms.

 

Electronic Description of Stage:

 

Required setting accuracy :


Performance requirements and design goals
Component Requirements 1
Motors: None -
Gearbox: None -
Limits 2: Hall effect switches on cylinders -
Fiducials: None -
Encoders: None -
Air Cylinders: Yes -
Air Solenoids: Yes -
Lock/Clamp/Brake: -
Interlocks: See Stage inter operation document -
  1. Speed, temperature, accuracies, electrical power, pressurized air, lubricant, coolant, N2 purge, ...                               Air pressure = 100PSI
  2. Primary (inner) and secondary (outer) limits. These can be magnetic, optical, or physical contact

Manufacturer's specifications and limitations
Component Maximum Operating Condition  Safe Ops Condition  Requirements 
Motors: - - -
Gearbox: - - -
Limits: - - -
Fiducials: - - -
Encoders: - - -
Air Cylinders: - - -
Air Solenoids: - - -
Lock/Clamp/Brake: - - -

Final Mechanical Assembly and Testing Results

Motor tuning parameters under different spatial orientations and environment
Parameter  Neutral Gravity  Uphill 1 Downhill  Cold  Cold Uphill 
PID Filter: KP: - - - - -
KI: - - - - -
KD: - - - - -
Acceleration (pulses/sec^2): - - - - - -
Deceleration (pulses/sec^2): - - - - - -
Speed (pulses/sec): - - - - - -
Other: - - - - - -
  1. Uphill defined as motor (or driven end of shaft) in lowest position

Motion Parameters

Linear Stage (constrained)
Distance from "home" 1 Position Motor Counts  Physical Units Time to Reach
Software Limits:  Forward - - -
Reverse - - -
Primary (inner) Limits:  Forward - - -
Reverse - - -
Secondary (outer) Limits:  Forward - - -
Reverse - - -
Position # 1 - - **
2 - - **
3 - - **
4 - - **
- - - -
- - - -

** Very important! Very difficult to achieve goals here.

  1. "Coarse" if from optical interrupter, "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.


 
Resolution of Stage
Encoder Counts/Inch Counts/Millimeter Counts/Degree
On Motor - - -
On Stage - - -


NOTES:

Mechanical Drawing(s) #D4099, D4090, D4411, D4420, D4130

Electronic Drawing(s) #EL-3066, EL-3082

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 the drive the stage towards the forward limit.