Last updated: 12-17-01

Project: DEIMOS
Stage: Slit Mask Selection
ID #: KDSM-001A
Engineer: V. Wallace

Mechanical Description of Stage:

Electronic Description of Stage:

The Slitmask Cassette stage uses Controller # 2, amplifier 2B and is connected to the E axis.
Requires an EL-1236R (Reverse) interface box.
Physical distance between slots is 0.41 inches.

Required setting accuracy:

Performance requirements and design goals                         
Component
Requirements *
Motor: Galil 50-1000
 
Linear Actuator: Ball Screw & Actuator Co. M23S8-SRA2-5010-20  
Gearbox: Bayside NE-23-10
Ratio = 10:1
Limits **: Microswitch DT-2RV22-A7  
Fiducials: Opto-Interruptor TRW #OPB-970-T55 (Optical)  
Encoders: On motor
See " Stage Resolution"
Air Solenoids: None  
Interlocks: See Interlock Schedule  
* Speed, temperature, accuracies, electrical power, pressurized air, lubricant, coolant, N2 purge, ...
** Primary (soft) and secondary (hard) limits. These can be magnetic, optical, or physical contact

NOTES:

Manufacturer's specifications and limitations      
Component Maximum Operating Condition  Safe Ops Condition  Requirements 
Motor:      
Gearbox:      
Limits:      
Fiducials:      
Encoders:      
Air Solenoids:      

Final Mechanical Assembly and Testing Results

Tests performed by: Ken Dietsch / Vern Wallace / C. Harper 10-5-01


Motor tuning parameters under different spacial orientations and environment    
Parameter   
DEIMOS @ 270 & 90 Degrees 
PID Filter KD:
 404
KP:
  79
KI:
   30
Accelerat on (pulses/sec^2):  
256000
Decelerat on (pulses/sec^2):  
256000
Speed   
 5000
Other: CN 1,1      CB9 for home fiducial, CB41 for all others    
*Uphill defined as motor (or driven end of shaft) in lowest position

Motion Parameters

Slit Mask Casette      
  Position Primary Encoder Counts  Time to Reach
Software Limits: Foward
300,000
  
Reverse
-590,000
  
Primary Limits:  Forward
 310820
  
Reverse
 -600273
  
Secondary Limits:  Forward
  322159
  
Reverse
 -699361
  
Position #   (6-9-01) Index
 0
  
Unload
  -539000
  
1
 -518874
  
2
 -409145
  
3
  -309775
 #2 to #3 = 25 Seconds
4
  -222480
  
5
  -140467
  
6
   -69078
  
7
    -1719
  
8
     +58669
  
9
   +115732
  
10
   +166160
  
11
   +213967
  
12
   +255025
 #12 to #13 = 25 Seconds
13
   +293113
 #2 to #13 = 40 Seconds
Resolution of Stage (Non-linear)  
Encoder Counts Between Slots
Near Slot #1
100,000
Near Slot #13
38,000

NOTES:

Mechanical Drawing(s) # D1211

Electronic Drawing(s) #

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.