Bottletopburly Posted October 23, 2018 Share Posted October 23, 2018 When you calibrate phd2 do you have to calibrate every outing or is it a once and forget or when would you recalibrate. Link to comment Share on other sites More sharing options...
+Ibbo Posted October 23, 2018 Share Posted October 23, 2018 recalibrate Bottletopburly 1 Link to comment Share on other sites More sharing options...
+RonC Posted October 23, 2018 Share Posted October 23, 2018 I calibrate at the beginning of a session and each target thereafter. (I ( and quite a few others) use PHD 1.44 not 2.0.) Cheers Ron Bottletopburly 1 Link to comment Share on other sites More sharing options...
andyboy1970 Posted October 23, 2018 Share Posted October 23, 2018 As said re-calibrate for each target. Bottletopburly 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted October 23, 2018 Author Share Posted October 23, 2018 2 hours ago, Ron Clarke said: I calibrate at the beginning of a session and each target thereafter. (I ( and quite a few others) use PHD 1.44 not 2.0.) Cheers Ron I did try phd 1.44 but had a habit of freezing phd2 more stable , I was on the assumption you calibrated near the equator not the target ? area then moved to target and start guiding Link to comment Share on other sites More sharing options...
+Graham Posted October 23, 2018 Share Posted October 23, 2018 (edited) Always calibrate on your target. Simply put. Scope travels different distances at different altitudes in the same time frame. Edited October 23, 2018 by Graham Bottletopburly 1 Link to comment Share on other sites More sharing options...
+Graham Posted October 23, 2018 Share Posted October 23, 2018 Think of it in terms of an alt/azi mount. If you point the scope at the horizon in 12 hours the end of the scope will travel through 180 degrees right round the horizon. . If on the other hand you point the scope straight up the mount will still rotate through the same 180 degrees but the end of the scope will not move as it will rotate about it's own axis. Bottletopburly 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted October 23, 2018 Author Share Posted October 23, 2018 33 minutes ago, Graham said: Always calibrate on your target. Simply put. Scope travels different distances at different altitudes in the same time frame. 16 minutes ago, Graham said: Think of it in terms of an alt/azi mount. If you point the scope at the horizon in 12 hours the end of the scope will travel through 180 degrees right round the horizon. . If on the other hand you point the scope straight up the mount will still rotate through the same 180 degrees but the end of the scope will not move as it will rotate about it's own axis. Thanks for clarifying graham ? every days a school day ???still learning . Link to comment Share on other sites More sharing options...
Tweedledee Posted October 30, 2018 Share Posted October 30, 2018 Some more useful info, thanks. ? Link to comment Share on other sites More sharing options...
Bottletopburly Posted December 16, 2018 Author Share Posted December 16, 2018 Worth noting using phd2 if you calibrate near the equator beginning of session and have DEC compensation ticked✔️ >brain >guiding tab you don't need to recalibrate on different targets as phd2 adjusts ra guiding rate based on Scope declination assuming dec coordinates are correct ,so a quick platesolve and sync mount before calibrating phd2 . red dwalf 1 Link to comment Share on other sites More sharing options...
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