vatt:vatt_stall
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vatt:vatt_stall [2021/06/15 04:22] paul |
vatt:vatt_stall [2021/06/17 22:46] paul |
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| ====== Recovering from a Stall ====== | ====== Recovering from a Stall ====== | ||
| - | ^ ^Jun 14, 2021, P Gabor et al.^ ✔✘ ^ | + | ^ ^Jun 14, 2021, P Gabor et al.^^ ✔✘ ^ |
| - | |Control room | :!: Mirror cover must be open. :!: | | | + | |Control room | :!: Mirror cover must be open. : |
| - | |Control room | 8-) If you want to close the dome slit (may be a good idea in very cold weather), close the mirror cover (assuming that the **breaks came on** when the stall occurred), than close the dome slit, and then open the mirror cover again. | | | + | |Control room | 8-) If you want to close the dome slit (may be a good idea esp. when windy), close the mirror cover (assuming that the **breaks came on** when the stall occurred), than close the dome slit, and then open the mirror cover again. |
| - | |Control room |Turn on the dome floodlights | | | + | |Control room |Turn on the dome floodlights |
| - | |Control room |'' | + | |Control room |'' |
| - | |Control room |Keep dome tracking on | | | + | |Control room |Keep dome tracking on || | |
| - | |Dome, lower lvl |Inspect the " | + | |Dome, lower lvl |Inspect the " |
| - | | ::: |=) the double-headed bumper " | + | | ::: |=) the double-headed bumper " |
| - | | ::: |=) from your vantage point at the dome's lower level, a flipper may show a green patch or no patch; you can never see a red patch from there | ::: | | + | | ::: |=) from your vantage point at the dome's lower level, a flipper may show a green patch or no patch; you can never see a red patch from there || ::: | |
| - | | ::: |=) if both are green, simply align the arrows **within a few inches** | | | + | | ::: ^ Safe (recommended) ^ Less safe | ::: | |
| - | | ::: |=) if one is green and the other has no patch, spin towards the latter, flipping it to green; then keep spinning until the arrows align **within a few inches** | ::: | | + | | ::: |=) if both are green, simply align the arrows meticulously |if both are green, simply align the arrows **within a few inches** |
| - | |Dome, upper lvl |Step onto the telescope yoke platform carefully (avoid imparting angular momentum in azimuth), and move the telescope to zenith | | | + | | ::: |=) if one is green and the other has no patch, spin towards the latter, flipping it to green; then keep spinning until the arrows align perfectly |if one is green and the other has no patch, spin towards the latter, flipping it to green; then keep spinning until the arrows align **within a few inches** | ::: | |
| - | |Dome, lower lvl |Align the arrows **accurately** | | | + | |Basement |__Disable the hydtrostatic bearing:__ Turn '' |
| - | |Dome, upper lvl |Bring the dome to its home position (gently spinning the encoder wheel) | | | + | |Dome, upper lvl |Move the telescope to zenith |
| - | |Control room |Set the breaks | | | + | |Dome, upper lvl |Turn the derotator (considerable force is required) back to home, untwisting the cable bundle |
| - | |Control room |Close the mirror cover | | | + | |Dome, lower lvl | |Align the Azimuth |
| - | |Control room |Turn Thermal control off | | | + | |Dome, upper lvl |Bring the dome to its home position (gently spinning the encoder wheel) |
| - | |Control room |Stop '' | + | |Basement |__Enable the hydrostatic bearing:__ Turn '' |
| - | |TCS room |[[vatt: | + | |Control room |Set the breaks |
| - | |Control room |Start '' | + | |Control room |Close the mirror cover || | |
| - | |Control room |Close and open '' | + | |Control room |Turn Thermal control off || | |
| - | |Control room |Turn Thermal control on | | | + | |Control room |Stop '' |
| - | | ^Done! | | | + | |TCS room |[[vatt: |
| + | |Control room |Close and open '' | ||
| + | |Control room |Start '' | ||
| + | |Control room |Turn Thermal control on || | | ||
| + | | ^Done! | ||
vatt/vatt_stall.txt · Last modified: 2021/06/17 22:46 by paul
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