OR Office Hours - GAM Testing

Time/Date

20230501T1600-1800

People

Obs/AstroPol: Onkar, David, Connor

Spaces Occupied

433C, dome

Goals

1. Test GAM

Log

1. Setup

   1. plugged in gam cable into gam and gam port of telescope

   2. turned on gam switch

   3. turned on dfmtcs and opened gam control

   4. turned on MDC and enabled drives and depressed halt motors

   5. clicked "update GAM status"

      1. Open

         

2. Testing

   1. south port filter wheel

      1. encoder: 

         1. tested by physically rotating south port filter to filter positions 1-7

         2. after each rotation, clicked "update GAM status", verified values

         3. NOTE: we have 8 south filters which displayed values 1-8 but in the manual only says we have 1-7 positions

         4. manual is labeled job408, our telescope is job721, lol

      2. motor:

         1. could successfuly issue motor position via gam control by entering value 1-8 and clicking "apply"

         2. gam status info automatically updates after clicking apply to new position

         3. Open

            

      3. SUCCESS

   2. translating stage

      1. encoder

         1. tested by physically moving the thingy on-axis and updating the gam status, still read a value of "3"

         2. upon visual inspection it is not clear if the encoder is attached to the 37pin gam cable or the serial connector

         3. no updates after moving the translating stage to the stowed or on-axis position, or after actuating the encoder switches physically

      2. motor

         1. did not respond to motor commands, probably because of encoder reading value of "3"

   3. on-axis filter wheel

      1. encoder

         1. at some point, sending commands just didnt work anymore and none of the gam software would respond or update, this was solved by restarting the gam control switch by powering it off and then back on as well as restarting dfmtcs

         2. anyway

         3. not sure if this is connected to the 37pin or the 14 pin but not updating after physical movement, still saying "2" when not on position "2"

      2. motor

         1. cannot test without 14 pin connection

   4. rotating mirror

      1. encoder

         1. accurately reported positions for north and west, however having issues with east and south, see below

      2. motor

         1. responds to motor commands BUT there appears to be physical friction keeping the motor from rotating the mirror to south or east, believe its the nub thing that sticks off the motor rubbing against the motor housing (the part that is shiny from all the rubbing)

ToDo

1. test with 14 pin and serial connections

2. buy the berg belts for the respective motors

3. inspect encoders for faulty connections or replace, especially for translating stage

Notes

• used page 21 in "telescope operations manual"

• used page 349-209 in electrical drawing package

Weather

N/A

Data

N/A