Last updated: 10-22-99
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 |
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| Encoders: None |
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| Air Cylinders: Yes |
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| Air Solenoids: Yes |
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| Lock/Clamp/Brake: |
- |
| Interlocks: See Stage
inter operation document |
- |
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Speed, temperature, accuracies, electrical power, pressurized air,
lubricant, coolant, N2 purge, ...
Air pressure = 100PSI
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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
Tests performed by:
Motor tuning parameters under different spatial
orientations and environment
| Parameter |
|
Neutral Gravity |
Uphill 1 |
Downhill |
Cold |
Cold Uphill |
| PID Filter: |
KD: |
- |
- |
- |
- |
- |
| KP: |
- |
- |
- |
- |
- |
| KI: |
- |
- |
- |
- |
- |
| Acceleration (pulses/sec^2): |
- |
- |
- |
- |
- |
- |
| Deceleration (pulses/sec^2): |
- |
- |
- |
- |
- |
- |
| Speed (pulses/sec): |
- |
- |
- |
- |
- |
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| Other: |
- |
- |
- |
- |
- |
- |
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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.
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"Coarse" if from optical interrupter, "Fine" if from an encoder index
pulse. Home is defined as zero counts.
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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 |
- |
- |
- |
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Repeatability:
-
Fiducial:
-
Encoder:
-
Air Cylinders:
| Position #1 |
A. De-Sta Co clamp #TC-8016 left-hand and Bimba air cylinder to un-clamp
(D4410) |
| |
B. De-Sta Co clamp #TC-802-MR two places |
| |
C. Bimba air cylinder to clamp/un-clamp #S1-MRS-094-DXP |
| |
D. Bimba air cylinder to dis-engage slide bearings #S1-MRS-094-DXDE |
| Positions #2, #3, & #4 |
A. De-Sta Co clamp #TC-8016 right-hand and Bimba air cylinder to un-clamp |
| |
B. Same |
| |
C. Same |
| |
D. Same |
| |
|
| |
|
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Air Solenoids:
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 drive the stage towards the forward limit.