Project: DEIMOS
Stage: Science Filter Wheel
ID #: KDSF-001A
Engineer: V. Wallace

Mechanical Description of Stage:Seven position: two are "user" positions, so can be selected and exchanged manually.

Electronic Description of Stage: Standard unconstrained rotary stage with seven positions. This stage uses a standard EL-1236 Stage Interconnect Box, a Galil 50-1000 motor and a single TRW OPB970-T55 fiducial. The position can be selected by any one of three means. First, the computer can instruct the wheel to either home the wheel or move to a discrete position. By selecting manual control from the manual paddle connected to Galil controller #1, the filter wheel can be jogged in slow or fast speed, homed, or moved to a discrete position. Finally, the filter can be moved by the push button station that lives inside of the Filter Wheel access hatch. When moving via the push buttons, the wheel is moved so that the filter slot that is selected is moved to the unload position instead of into the beam.

Required setting accuracy :

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.

• Gear reduction function:

• 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-3056, EL-3073

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.