Table of Contents
Motor Positions
| Motor #/Name | Number of step | Position | Commands |
|---|---|---|---|
| 1. Zenith Prism | 0 | Pointing at standard lamp | M,1,0 |
| 1408 | Pointing at zenith sky | M,1,1408 | |
| 2112 | Pointing at UVB port | M,1,2112 | |
| 2. Azimuth Tracker | 0 | Referance direction (North) | M,2,0 |
| 14680 | Referance direction, 1 full turn from step #0 | M2,14570 | |
| 3. Iris | 0 | Iris fully close | M,3,0 |
| 75 or 250 | Iris fully open | M,3,75 or M,3,250 | |
| 4. Filterwheel #1 | 320 | Posistion 0 | M,4,320 |
| 256 | Posistion 1 | M,4,256 | |
| 192 | Posistion 2 | M,4,192 | |
| 128 | Posistion 3 | M,4,128 | |
| 64 | Posistion 4 | M,4,64 | |
| 0 | Posistion 5 | M,4,0 | |
| 5. Filterwheel #2 | 0 | Posistion 0 (ND0) | M,5,0 |
| 64 | Posistion 1 (ND1) | M,5,64 | |
| 128 | Posistion 2 (ND2) | M,5,128 | |
| 192 | Posistion 3 (ND3) | M,5,192 | |
| 256 | Posistion 4 (ND4) | M,5,256 | |
| 320 | Posistion 5 (ND5) | M,5,320 | |
| 6. Micrometer #2 (for MB) | M,6,xxx | ||
| 9. Micrometer #2 (For SB) | M,9,xxx | ||
| 10. Micrometer #1 | M,10,xxx | ||
| 11. Slitmask | 0 | Slit 0: (HG) 303.2 - 426.4nm | M,11,0 |
| 2 | Dark count | M,11,2 | |
| 4 | Slit 1: 306.3 - 431.4nm | M,11,4 | |
| 6 | Slit 2: 310.1 - 437.3nm | M,11,6 | |
| 8 | Slit 3: 313.5 - 442.8nm | M,11,8 | |
| 10 | Slit 4: 316.8 - 448.1nm | M,11,10 | |
| 12 | Slit 5: 316.8 - 448.1nm | M,11,12 | |
| 14 | Slit 6: 320.1 - 453.2nm | M,11,14 | |
Motor Wiring
MB Zenith Wiring
| DB Pin | Motor Side | Colour |
|---|---|---|
| 1 | Motor Back | Yellow |
| 2 | Motor Back | Grey |
| 3 | Motor Front | Yellow |
| 4 | Motor Front | Grey |
| 5 | LED | Blue |
| 6 | LED | |
| 7 | NC | |
| 8 | Motor Back | Black |
| 9 | Motor Back | Red |
| 10 | Motor Front | |
| 11 | Motor Front | Red |
| 12 | LED | Orange |
| 13 | LED | Black |
| 14 | NC | |
| 15 | NC |
Note: Motor Side front refers to the shaft side
Converting 8 wire Airpax/EAD motor to 6 wire Portescap Motor
The original multi-board single monochromator Brewer Spectrophotometer had an eight wire motor with 2 optical detectors (LED’s) and was wired as follows:
Subsequent multi-board double monochromator Brewer Spectrophotometers have the optical switches removed, utilizing only the physical hard stops to initiate positioning of the shutter at reset. When the single board electronics Brewer was developed, a single optical detector was employed.
The original eight wire motor has become obsolete and the current motor sourced has only 6 wires, two wires, each providing power to a pair of coils. This motor configuration requires the following wire positioning.
