----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Tue Dec 28 17:06:29 GMT 1999 Year: 99 Doy: 362 Observer: yasukawa WEATHER COMMENT: Tue Dec 28 17:09:03 GMT 1999 Cool, clear, brisk west wind. Tue Dec 28 17:10:19 GMT 1999 CHIP Startup--Initializing new tape **MKIV PROBLEM**: Tue Dec 28 17:24:20 GMT 1999 Cold morning, checked 1/2-wave plate encoder power supply voltage. Voltage was 11.98 VDC. On DOY 99351, I checked it after phasing stabilized and voltage was 12.1 VDC. Tue Dec 28 17:27:04 GMT 1999 MKIV Start Patrol **MKIV PROBLEM**: Tue Dec 28 17:49:08 GMT 1999 Experienced a phasing reversal. Checked voltage at 1/2-wave plate encoder power supply, it was 11.99 VDC. Still relatively cold in dome. Tue Dec 28 18:01:12 GMT 1999 CHIP Bias Tue Dec 28 18:02:21 GMT 1999 CHIP End Bias Tue Dec 28 18:02:31 GMT 1999 CHIP Water Tue Dec 28 18:02:53 GMT 1999 PICS Flat Tue Dec 28 18:03:18 GMT 1999 CHIP End Water Tue Dec 28 18:05:29 GMT 1999 PICS End Flat **MKIV PROBLEM**: Tue Dec 28 18:07:07 GMT 1999 Another phasing reversal occurrence. Power supply voltage varied between 11.99 and 12.00 vdc. **PICS PROBLEM**: Tue Dec 28 18:14:05 GMT 1999 There was a timeout error on Optics during last halphadisc, wheel may not have gotten to clear position. **PICS PROBLEM**: Tue Dec 28 18:18:33 GMT 1999 Occulting wheel is not changing to Clear position. Investigating. **PICS PROBLEM**: Tue Dec 28 18:36:26 GMT 1999 Checked dout status and driver cards by swapping with objective wheel cards. Problem not with boards. Will try a Kill/Run. Unloading tape and loading new tape. **MKIV PROBLEM**: Tue Dec 28 18:40:50 GMT 1999 Power supply voltage is 12.10 VDC. Have not had phase reversal for a bit. **PICS PROBLEM**: Tue Dec 28 18:43:26 GMT 1999 Kill/Run did not fix occulting wheel problem. Stopping CHIP so I can reset YCC. Tue Dec 28 18:45:32 GMT 1999 CHIP CHIP End Patrol **PICS PROBLEM**: Tue Dec 28 18:48:01 GMT 1999 YCC reset did not fix problem. Tue Dec 28 18:48:44 GMT 1999 CHIP CHIP Start Patrol Tue Dec 28 19:02:08 GMT 1999 CHIP Bias Tue Dec 28 19:03:18 GMT 1999 CHIP End Bias Tue Dec 28 19:03:35 GMT 1999 CHIP Water Tue Dec 28 19:04:25 GMT 1999 CHIP End Water **PICS PROBLEM**: Tue Dec 28 19:08:30 GMT 1999 Indication is occulter wheel drive motor is not working. There is 22K-ohms across windings. Spare motor measures 1.8 ohms. Motor does not turn when 12V applied, spare turns with 12V. Tue Dec 28 20:02:00 GMT 1999 CHIP Gain Tue Dec 28 20:07:39 GMT 1999 CHIP End Gain Tue Dec 28 20:07:49 GMT 1999 CHIP Bias Tue Dec 28 20:08:44 GMT 1999 CHIP End Bias Tue Dec 28 20:08:59 GMT 1999 CHIP Water Tue Dec 28 20:09:46 GMT 1999 CHIP End Water Tue Dec 28 20:41:30 GMT 1999 PICS Start Patrol **PICS PROBLEM**: Tue Dec 28 20:41:47 GMT 1999 Removed motor assembly and stripped it down. With motor off gear assembly, the motor turned with 12VDC applied. Recheck of resistance and it was 2-ohms across the motor windings--good. Gearbox was occasionally sticking--really stuck in one direction! Stripped gearbox, lubricated planetary gears and reassembled. Reassembled motor and gearbox and tested. It ran OK with 12V. Reinstalled assembly and tested with program. Motor runs OK, but need to realign Home. **PICS PROBLEM**: Tue Dec 28 20:57:29 GMT 1999 OK, Home is aligned. Geneva arm wasn't quite engaged in lock position when Home bump reached the microswitch. Adjusted the cam so that geneva locks up before home is enabled. Marked the cam with fiducial. AND..... just to throw me off, for good measure..... the declination decided to reach its limit and reset itself! When I looked at the PICS display to check if things were OK, the display was dark!! Once I reset the dec, PICS went into transfers, further delaying confirmation that fix went OK. PICS appears to be working OK now. 9 CHIP End Water COMMENT: Tue Dec 28 21:06:20 GMT 1999 Checked other systems and they appear to be humming along after being ignored during the PICS fix. I do not see any evidence of activity. **PICS PROBLEM**: Tue Dec 28 21:54:06 GMT 1999 Occulting wheel is sticking again. Stopping. **PICS PROBLEM**: Tue Dec 28 21:59:44 GMT 1999 Same problem. I will stop for the day and have Darryl take a look at the gearing to see if he can find what is causing the jam. His mechanical expertise may help him see something I couldn't. Tue Dec 28 22:02:00 GMT 1999 CHIP Bias Tue Dec 28 22:03:05 GMT 1999 CHIP End Bias Tue Dec 28 22:03:16 GMT 1999 CHIP Water Tue Dec 28 22:04:00 GMT 1999 CHIP End Water Tue Dec 28 22:13:32 GMT 1999 CHIP CHIP End Patrol Tue Dec 28 22:15:25 GMT 1999 CHIP ending tape **MKIV PROBLEM**: Tue Dec 28 22:22:52 GMT 1999 VOltage on encoder power supply was 12.05 after stopping MKIV. I increased voltage +0.2 volts to 12.25V. Hopefully this will raise the voltage from 11.98 to 12.18 in the morning if it is cold again. If theory is correct, we should not see phasing errors if voltage is above 12.1 V. Tue Dec 28 22:34:07 GMT 1999 MkIV 17_27.rawmk4 18_36.rawmk4 19_35.rawmk4 20_34.rawmk4 21_34.rawmk4 17_30.rawmk4 18_39.rawmk4 19_38.rawmk4 20_37.rawmk4 21_37.rawmk4 17_33.rawmk4 18_42.rawmk4 19_41.rawmk4 20_40.rawmk4 21_40.rawmk4 17_36.rawmk4 18_45.rawmk4 19_44.rawmk4 20_43.rawmk4 21_43.rawmk4 17_39.rawmk4 18_48.rawmk4 19_47.rawmk4 20_46.rawmk4 21_46.rawmk4 17_41.rawmk4 18_51.rawmk4 19_50.rawmk4 20_49.rawmk4 21_49.rawmk4 17_44.rawmk4 18_54.rawmk4 19_53.rawmk4 20_52.rawmk4 21_52.rawmk4 17_47.rawmk4 18_57.rawmk4 19_56.rawmk4 20_55.rawmk4 21_55.rawmk4 17_50.rawmk4 19_00.rawmk4 19_59.rawmk4 20_58.rawmk4 21_58.rawmk4 17_53.rawmk4 19_02.rawmk4 20_02.rawmk4 21_01.rawmk4 22_00.rawmk4 17_56.rawmk4 19_05.rawmk4 20_05.rawmk4 21_04.rawmk4 22_03.rawmk4 17_59.rawmk4 19_08.rawmk4 20_08.rawmk4 21_07.rawmk4 22_06.rawmk4 18_02.rawmk4 19_11.rawmk4 20_11.rawmk4 21_10.rawmk4 22_09.rawmk4 18_05.rawmk4 19_14.rawmk4 20_14.rawmk4 21_13.rawmk4 c18_08.rawmk4 18_11.rawmk4 19_17.rawmk4 20_17.rawmk4 21_16.rawmk4 c18_14.rawmk4 18_18.rawmk4 19_20.rawmk4 20_20.rawmk4 21_19.rawmk4 c18_21.rawmk4 18_24.rawmk4 19_23.rawmk4 20_23.rawmk4 21_22.rawmk4 18_27.rawmk4 19_26.rawmk4 20_26.rawmk4 21_25.rawmk4 18_30.rawmk4 19_29.rawmk4 20_29.rawmk4 21_28.rawmk4 18_33.rawmk4 19_32.rawmk4 20_32.rawmk4 21_31.rawmk4