Failed meridian flip with 10 Micron GM1000HPS


Hi there,

I have only just started using SGP v2 and have a problem with meridian flip failing (log posted below)

I am using the late Per Frejvall ASCOM driver and SGP v2.6.1.106.

Wondering if you could help diagnose…




[09/13/18 03:08:13.940][DEBUG] [Sequence Thread] ------------- Starting capture frame for event[2] -------------
[09/13/18 03:08:13.942][DEBUG] [Sequence Thread] Sending commands…
[09/13/18 03:08:13.942][DEBUG] [Sequence Thread] SetFlatBox: Frame Type is Light
[09/13/18 03:08:13.942][DEBUG] [Sequence Thread] EventMarker 2 - t:Triangulum Galaxy (M33) (0); e:2; f:9; o:
[09/13/18 03:08:13.942][DEBUG] [Sequence Thread] Checking if Meridian Flip is needed
[09/13/18 03:08:14.082][DEBUG] [Sequence Thread] Telescope is on the West side of the mount
[09/13/18 03:08:14.082][DEBUG] [Sequence Thread] Meridian Flip needed, Hour Angle >= Degrees Past To Flip: 1.40695529728569 >= 0.25
[09/13/18 03:08:14.082][DEBUG] [Sequence Thread] Running blocking meridian flip…
[09/13/18 03:08:14.142][DEBUG] [Pier Flip Thread] Meridian Flip: Starting Meridian Flip Procedure
[09/13/18 03:08:14.143][DEBUG] [Pier Flip Thread] Meridian Flip: Skipping Solve
[09/13/18 03:08:14.145][DEBUG] [Pier Flip Thread] Meridian Flip: Stopping the Auto Guider
[09/13/18 03:08:14.149][DEBUG] [Pier Flip Thread] Meridian Flip: Sending Telescope command to execute meridian flip
[09/13/18 03:08:14.374][DEBUG] [Telescope Thread] ASCOM Telescope: Pier side is West
[09/13/18 03:08:14.374][DEBUG] [Telescope Thread] ASCOM Telescope: attempting pier flip using sideOfPier
[09/13/18 03:08:15.491][DEBUG] [Telescope Thread] Setting Pier East
[09/13/18 03:08:15.774][DEBUG] [Telescope Thread] Pier Flip failed when using side of pier: System.Exception: Flip requested but cannot be done at present position.
[09/13/18 03:08:37.778][DEBUG] [Telescope Thread] ASCOM Telescope: Failed to flip because starting pier side and ending pier side are the same!
[09/13/18 03:08:37.808][DEBUG] [Pier Flip Thread] Meridian Flip: Telescope command to meridian flip has completed
[09/13/18 03:08:37.808][DEBUG] [Pier Flip Thread] Meridian Flip: Telescope failed to perform meridian flip
[09/13/18 03:08:46.513][DEBUG] [Pier Flip Thread] Meridian Flip: Procedure complete
[09/13/18 03:09:00.735][DEBUG] [Sequence Thread] Blocking Pier Flip: Failed to meridian flip, aborting sequence (False)
[09/13/18 03:09:00.735][DEBUG] [Sequence Thread] Adding sequence level notification: Failed to meridian flip, aborting sequence.
[09/13/18 03:09:00.747][DEBUG] [Sequence Thread] EventMarker 3 - t:Triangulum Galaxy (M33) (0); e:2; f:9; o:* aborted *
[09/13/18 03:09:00.747][DEBUG] [Sequence Thread] EventMarker 10 - t:Triangulum Galaxy (M33) (0); e:2; f:9; o:* aborted *
[09/13/18 03:09:00.756][DEBUG] [Sequence Thread] Run event requested sequence abort…
[09/13/18 03:09:00.757][DEBUG] [Sequence Thread] ********* Run post sequence *********
[09/13/18 03:09:00.757][DEBUG] [Sequence Thread] SGPro capture cal frame mode is OFF…
[09/13/18 03:09:00.759][DEBUG] [Sequence Thread] Clearing timed monitoring events…
[09/13/18 03:09:00.759][DEBUG] [Sequence Thread] Checking RunEndOfSequenceEquipmentOptions, force = False
[09/13/18 03:09:00.759][DEBUG] [Sequence Thread] Sequence was aborted, skipping end of sequence options…
[09/13/18 03:09:00.761][DEBUG] [Main Thread] Aborting sequence timer thread…
[09/13/18 03:09:00.761][DEBUG] [Main Thread] Sending sequence end notification…
[09/13/18 03:09:00.761][DEBUG] [Main Thread] Resetting UI elements…
[09/13/18 03:09:00.761][DEBUG] [Main Thread] Checking if sequence has work left…
[09/13/18 03:09:00.761][DEBUG] [Main Thread] Work left…
[09/13/18 03:09:00.762][DEBUG] [Main Thread] Updating big status…
[09/13/18 03:09:00.762][DEBUG] [Main Thread] Enabling menu items…
[09/13/18 03:09:00.786][DEBUG] [Main Thread] Set target icons…
[09/13/18 03:09:00.786][DEBUG] [Main Thread] Removing camera protection…
[09/13/18 03:09:00.810][DEBUG] [Main Thread] Monitoring system shutdown…
[09/13/18 03:09:00.810][DEBUG] [Main Thread] SequenceEnds complete…


Hi Nick.

I am replying from my office, so not near my notes at home. I have a GM1000HPS and GM2000HPS (at home obs and also a remote obs) and there is an older thread on here and also on the 10 Micron forum regarding the relevant settings.

I will do my best to recall them now as I type:

  1. In the 10 Micron HC, set Flip slew tolerance to 3 degrees; Flip Guide tolerance to 5 degrees.
  2. in SGP set time to meridian flip to -5; tick wait for meridian.

If you get any issue I’m happy for you to contact me via PM and I’ll do my best to help you (just note I’m away until the start of next week though).




Many thanks Barry,

I will try that and report back, appreciate the help!

kind regards