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= Tuning the rate = The following test aims at checking the feasability and behaviour stability of the FWs operated at higher rates (= higher speed). The baseline rate = 100, corresponding to an angular speed of 360 degrees in 18.75 seconds. == Photometer filter wheel == || || Script || TCL || Parameters || Comments || || 1 || PACS_Phot_HK_Setup_OBS || || || || || 2 || PACS_Phot_Fil_Diaghk_Setup_OBS || || || || || 3 || CONF_phot_fltw_param_OBS || Yes || rate,drive_current,threshold || || || 4 || PACS_Phot_Fil_nturns_OBS || Yes || nturns : #turns of the FW || || || 5 || PACS_Diaghk_Reset_OBS || || || || || 6 || PACS_SAFE_MODE.tcl || || || || |
1. Filter Wheel control loop procedures
2. Conditions
All tests described can be executed from SAFE MODE of from SPECTROSCOPY.
3. Threshold Tuning
3.1. Threshold parameter optimisation Photometer filter wheel
A loop over steps 3 & 4 can be implemented for a number of thresholds
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Script |
TCL |
Parameters |
Comments |
1 |
PACS_Phot_HK_Setup_OBS |
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2 |
PACS_Phot_Fil_Diaghk_Setup_OBS |
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3 |
CONF_phot_fltw_param_OBS |
Yes |
rate,drive_current,threshold |
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4 |
PACS_Phot_Fil_nturns_OBS |
Yes |
nturns : number of full turns of the FW |
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5 |
PACS_Diaghk_Reset_OBS |
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6 |
PACS_SAFE_MODE.tcl |
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3.2. Threshold parameter optimisation Spectrometer filter wheel
A loop over steps 3 & 4 can be implemented for a number of thresholds
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Script |
TCL |
Parameters |
Comments |
1 |
PACS_Spec_HK_Setup_OBS |
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2 |
PACS_Spec_Fil_Diaghk_Setup_OBS |
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3 |
CONF_spec_fltw_param_OBS |
Yes |
rate,drive_current,threshold |
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4 |
PACS_Spec_Fil_nturns_OBS |
Yes |
nturns : number of full turns of the FW |
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5 |
PACS_Diaghk_Reset_OBS |
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6 |
PACS_SAFE_MODE.tcl |
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4. Current loop
Loop over current from 10 to 100mA by steps of 10. For each setting, performs nturns *OPEN LOOP* movements of 360 degrees (default = 3). Open loop movement means that the wheel is driven for a given time, depending on the size of the movement and the rate. Consequently, the movement might finally not be of the expected size.
4.1. Photometer filter wheel
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Script |
TCL |
Parameters |
Comments |
1 |
PACS_Phot_HK_Setup_OBS |
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2 |
PACS_Phot_Fil_Diaghk_Setup_OBS |
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3 |
CONF_phot_fltw_param_OBS |
Yes |
rate,drive_current,threshold |
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4 |
PACS_Phot_Fil_Current_Loop_OBS |
No |
nturns : #turns of the FW/current setting |
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5 |
PACS_Diaghk_Reset_OBS |
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6 |
PACS_SAFE_MODE.tcl |
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5. Tuning the rate
The following test aims at checking the feasability and behaviour stability of the FWs operated at higher rates (= higher speed). The baseline rate = 100, corresponding to an angular speed of 360 degrees in 18.75 seconds.
5.1. Photometer filter wheel
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Script |
TCL |
Parameters |
Comments |
1 |
PACS_Phot_HK_Setup_OBS |
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2 |
PACS_Phot_Fil_Diaghk_Setup_OBS |
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3 |
CONF_phot_fltw_param_OBS |
Yes |
rate,drive_current,threshold |
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4 |
PACS_Phot_Fil_nturns_OBS |
Yes |
nturns : #turns of the FW |
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5 |
PACS_Diaghk_Reset_OBS |
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6 |
PACS_SAFE_MODE.tcl |
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