SGP " not able to find focus point."

I would love some help. I have checked multiple times to make sure mechanically the focuser is working, tuned it, etc. but no matter what I cannot get SGP to find the focus point. I used the formula on page 136 of the manual, which gives me 200 steps. Tried a few times, depending, I get something between 175 and 225 steps but I have tried everything in between. I am not exactly sure how much \ backlash I have, but it does not apear to be much. I have tried every backlash value between 25 to 300 in a trial and error fashion. No matter what step value or BL value I use, I inevitably get this message that SGP cannot find a focus, and, my “V” graph alwayus has a leveling off to the upper right.

Is there anything I might be missing here?

{
“AutoFocusId”: 4,
“FocusParams”: {
“img”: {
“a”: “baf0ea4e-6f10-4561-8b36-b9f2a590745b”,
“b”: “C:\Users\chiro\AppData\Local\SequenceGenerator\Temp”,
“c”: “metric”,
“d”: “1x1”,
“e”: 0,
“f”: 8.0,
“g”: 0,
“h”: null,
“i”: true,
“j”: false,
“k”: false,
“l”: “Not Set”,
“m”: “NotSet”,
“n”: 0,
“o”: false,
“p”: false,
“q”: false,
“r”: false,
“s”: “Light”,
“t”: null,
“u”: 0,
“v”: null
},
“dataPoints”: 7,
“stepSize”: 300,
“imagesTaken”: 8,
“autoClose”: true,
“manualStarSelect”: false,
“closeDelay”: 30,
“saveData”: false,
“saveLocation”: “C:\Users\chiro\OneDrive\Desktop\IMAGE DIRECTORY”,
“bUseSameSet”: false,
“bUseAfDarks”: false,
“sAfDarksPath”: “”,
“bSettleBeforeFrame”: false,
“bAfCrop”: false,
“nAfCropPct”: 0,
“DisableSmartFocus”: false,
“RunningTargetName”: “m101”
},
“FocusResult”: {
“AfState”: “Success”,
“AtTime”: “2020-02-10T23:50:35.0263589-08:00”,
“SkipAfRun”: false,
“Hfr”: 4.9,
“FocuserPosition”: 17930.0,
“Message”: “”
},
“ForTarget”: “m101”,
“Runs”: [
{
“AutoFocusId”: 0,
“AttemptNum”: 1,
“FocusStartTime”: “2020-02-10T23:47:38.363514-08:00”,
“FocusEndTime”: “2020-02-10T23:50:07.5810085-08:00”,
“DataPoints”: [
{
“stepVal”: 19018,
“metricVal”: 1491.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:47:50.4893631-08:00”,
“NumStars”: 18
},
{
“stepVal”: 18718,
“metricVal”: 1421.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:48:10.5048908-08:00”,
“NumStars”: 19
},
{
“stepVal”: 18418,
“metricVal”: 937.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:48:31.6003672-08:00”,
“NumStars”: 31
},
{
“stepVal”: 18118,
“metricVal”: 439.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:48:52.5712334-08:00”,
“NumStars”: 93
},
{
“stepVal”: 17818,
“metricVal”: 333.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:49:12.5752666-08:00”,
“NumStars”: 139
},
{
“stepVal”: 17518,
“metricVal”: 742.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:49:33.5587961-08:00”,
“NumStars”: 43
},
{
“stepVal”: 17218,
“metricVal”: 1280.0,
“lAvg”: -1.0,
“weight”: 0.0,
“AtTime”: “2020-02-10T23:49:54.5747088-08:00”,
“NumStars”: 12
}
],
“Fit”: {
“BestPosition”: 17930,
“FitQuality”: 0.96983947428098438,
“A”: 17.337301587301585,
“B”: -621.703746031746,
“C”: 5577.4776374444436,
“FitResult”: 4,
“IsFit”: true,
“FitQualityPercentageString”: “97%”,
“IsSuccess”: true
},
“FocusParams”: null,
“FocusResult”: null
}
]
}

[02/10/20 23:54:43.654][INFO][Camera Thread][SQ;AF;] Incremental Fit Result (7): quality=76%; a=13.031746031746; b=-469.398412698413; c=4231.55025555555;
[02/10/20 23:54:43.655][DEBUG][Camera Thread][SQ;AF;] Emit AFPack screenshot: Points: 7; Final: False
[02/10/20 23:54:43.673][INFO][Camera Thread][SQ;AF;] Detected focus getting worse! Shifting auto focus range
[02/10/20 23:54:43.674][DEBUG][Main Thread][SQ;AF;] Adding sequence level notification: Cannot find focus point, assuming focus is outward, adjusting smart focus range…
[02/10/20 23:54:43.694][DEBUG][Camera Thread][SQ;AF;] Sending Notification: Warning - Cannot find focus point, assuming focus is outward, adjusting smart focus range…
[02/10/20 23:54:43.695][DEBUG][Main Thread][SQ;AF;] Adding sequence level notification: Focus cannot be determined. Moving to start position of 17930 to reattempt. Fit Quality 76%
[02/10/20 23:54:43.720][DEBUG][Camera Thread][SQ;AF;] Sending Notification: Warning - Focus cannot be determined. Moving to start position of 17930 to reattempt. Fit Quality 76%
[02/10/20 23:54:43.720][WARN][Camera Thread][SQ;AF;] Focus cannot be determined. Moving to start position of 17930 to reattempt. Fit Quality 76%
[02/10/20 23:54:43.720][DEBUG][Camera Thread][SQ;AF;] MoveFocuserAbs: Start, move to 17930…
[02/10/20 23:54:43.720][DEBUG][Camera Thread][SQ;AF;] ASCOM Focuser: MoveSync - start…
[02/10/20 23:54:43.720][DEBUG][Camera Thread][SQ;AF;] Focuser moving to 17930
[02/10/20 23:54:43.723][DEBUG][Camera Thread][SQ;AF;] Focuser move call complete
[02/10/20 23:54:43.723][DEBUG][Move Monitor Thread][SQ;AF;] ASCOM Focuser: Move monitor thread is started…
[02/10/20 23:54:55.869][DEBUG][Move Monitor Thread][SQ;AF;] ASCOM Focuser: Move monitor thread -> movement complete
[02/10/20 23:54:55.907][DEBUG][Camera Thread][SQ;AF;] ASCOM Focuser: MoveSync - Focuser reports it is done moving, continuing…
[02/10/20 23:54:55.908][DEBUG][Camera Thread][SQ;AF;] MoveFocuserAbs: End, move complete, at 17930…
[02/10/20 23:54:55.908][DEBUG][Camera Thread][SQ;AF;] Emit AFPack screenshot: Points: 7; Final: True
[02/10/20 23:54:55.910][INFO][Camera Thread][SQ;AF;] Auto focus data
[02/10/20 23:54:55.911][INFO][Camera Thread][SQ;AF;] - Data Points: 7
[02/10/20 23:54:55.911][INFO][Camera Thread][SQ;AF;] - Step Size: 300
[02/10/20 23:54:55.911][INFO][Camera Thread][SQ;AF;] - Current Position: 17930
[02/10/20 23:54:55.911][INFO][Camera Thread][SQ;AF;] - Initial Move Position: 18830
[02/10/20 23:54:55.911][INFO][Camera Thread][SQ;AF;] - Panic Move Position: 17930
[02/10/20 23:54:55.915][ERROR][Camera Thread][SQ;AF;] AF Darks exception: The path is not of a legal form.
[02/10/20 23:54:55.916][INFO][Camera Thread][SQ;AF;] Moving focuser to next position (18830)…
[02/10/20 23:54:55.916][DEBUG][Camera Thread][SQ;AF;] MoveFocuserAbs: Start, move to 18830…
[02/10/20 23:54:55.916][DEBUG][Camera Thread][SQ;AF;] ASCOM Focuser: MoveSync - start…
[02/10/20 23:54:55.916][DEBUG][Camera Thread][SQ;AF;] Focuser moving to 18830
[02/10/20 23:54:55.919][DEBUG][Camera Thread][SQ;AF;] Focuser move call complete
[02/10/20 23:54:55.919][DEBUG][Move Monitor Thread][SQ;AF;] ASCOM Focuser: Move monitor thread is started…
[02/10/20 23:55:07.055][DEBUG][Move Monitor Thread][SQ;AF;] ASCOM Focuser: Move monitor thread -> movement complete
[02/10/20 23:55:07.069][DEBUG][Camera Thread][SQ;AF;] ASCOM Focuser: MoveSync - Focuser reports it is done moving, continuing…
[02/10/20 23:55:07.070][DEBUG][Camera Thread][SQ;AF;] MoveFocuserAbs: End, move complete, at 18830…
[02/10/20 23:55:07.070][DEBUG][Camera Thread][SQ;AF;] Calculating step metric…
[02/10/20 23:55:07.070][DEBUG][Camera Thread][SQ;AF;] Taking auto focus frame(s)…
[02/10/20 23:55:07.071][DEBUG][Camera Thread][SQ;AF;] ASCOM camera: Capturing auto focus frame…
[02/10/20 23:55:07.071][DEBUG][Camera Thread][SQ;AF;] ASCOM: AF Binning: 1x1…
[02/10/20 23:55:07.071][DEBUG][Camera Thread][SQ;AF;] ASCOM: AF Exposure length: 8 seconds…
[02/10/20 23:55:07.071][DEBUG][Camera Thread][SQ;AF;] ASCOM: AF Exposure DL speed: HIGH
[02/10/20 23:55:07.072][DEBUG][Camera Thread][SQ;AF;] SetAscomHighSpeed…
[02/10/20 23:55:07.072][DEBUG][Camera Thread][SQ;AF;] Cannot set readout speed, not supported by camera…
[02/10/20 23:55:07.072][DEBUG][Camera Thread][SQ;AF;] ASCOM Camera: exposure started, waiting…
[02/10/20 23:55:15.100][DEBUG][Camera Thread][SQ;AF;] ASCOM Camera: exposure complete, waiting for camera to report image ready…
[02/10/20 23:55:16.068][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Start…
[02/10/20 23:55:16.068][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Checking image data…
[02/10/20 23:55:16.068][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Create normal preview bitmap…
[02/10/20 23:55:16.073][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Locking preview bits…
[02/10/20 23:55:16.073][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Starting byte traversal…
[02/10/20 23:55:16.073][TRACE][Camera Thread][SQ;AF;] SaveFileAscom: Row padding -> 0
[02/10/20 23:55:16.199][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Unlocking preview bits…
[02/10/20 23:55:16.199][DEBUG][Camera Thread][SQ;AF;] SaveFileAscom: Done
[02/10/20 23:55:16.199][DEBUG][Camera Thread][SQ;AF;] Internal Interface: Set Preview…
[02/10/20 23:55:16.199][DEBUG][Camera Thread][SQ;AF;] Display image preview using asynch task…
[02/10/20 23:55:16.584][DEBUG][Main Thread][SQ;AF;] --> Find stars (normal)
[02/10/20 23:55:16.665][DEBUG][Main Thread][SQ;AF;] AF frame was too large… downsample = 0.5…
[02/10/20 23:55:18.581][DEBUG][Main Thread][SQ;AF;] Star detection using min star size of 3px…
[02/10/20 23:55:18.581][DEBUG][Main Thread][SQ;AF;] Star detection using max star size of 60px…
[02/10/20 23:55:18.633][DEBUG][Main Thread][SQ;AF;] Find stars took: 2049 ms…
[02/10/20 23:55:18.633][DEBUG][Main Thread][SQ;AF;] Star list contains 26 stars…
[02/10/20 23:55:18.633][DEBUG][Main Thread][SQ;AF;] Calculating HFR with sample size: 6
[02/10/20 23:55:19.050][DEBUG][Camera Thread][SQ;AF;] Auto focus HFR calculated at: 11.45
[02/10/20 23:55:20.057][INFO][Camera Thread][SQ;AF;] Incremental Fit Result (1): quality=%; a=0; b=0; c=0;
[02/10/20 23:55:20.059][INFO][Camera Thread][SQ;AF;] Moving focuser to next position (18530)…
[02/10/20 23:55:20.059][DEBUG][Camera Thread][SQ;AF;] MoveFocuserAbs: Start, move to 18530…
[02/10/20 23:55:20.059][DEBUG][Camera Thread][SQ;AF;] ASCOM Focuser: MoveSync - start…
[02/10/20 23:55:20.059][DEBUG][Camera Thread][SQ;AF;] Focuser moving to 18530
[02/10/20 23:55:20.060][DEBUG][Camera Thread][SQ;AF;] Focuser backlash active, modified move to 18504
[02/10/20 23:55:20.062][DEBUG][Camera Thread][SQ;AF;] Focuser move call complete
[02/10/20 23:55:20.063][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Focuser backlash thread has started…
[02/10/20 23:55:20.063][DEBUG][Move Monitor Thread][SQ;AF;BC;] ASCOM Focuser: Move monitor thread is started…
[02/10/20 23:55:25.065][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Backlash thread has detected that movement to modified position (18504) is complete…
[02/10/20 23:55:25.065][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Moving focuser to original requested position (18530)…
[02/10/20 23:55:25.065][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Focuser backlash compensation needed. Steps: 26 Direction:OUT
[02/10/20 23:55:25.065][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Focuser moving to 18530
[02/10/20 23:55:25.066][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Focuser move call complete
[02/10/20 23:55:25.066][DEBUG][Move Monitor Thread][SQ;AF;BC;] ASCOM Focuser: Move monitor thread is started…
[02/10/20 23:55:27.067][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Focuser backlash completed. Focuser is at original request position (18530)…
[02/10/20 23:55:27.068][DEBUG][Focuser Backlash Thread][SQ;AF;BC;] Focuser backlash thread has ended…
[02/10/20 23:55:27.068][DEBUG][Camera Thread][SQ;AF;] ASCOM Focuser: MoveSync - Focuser reports it is done moving, continuing…
[02/10/20 23:55:27.069][DEBUG][Camera Thread][SQ;AF;] MoveFocuserAbs: End, move complete, at 18530…
[02/10/20 23:55:27.070][DEBUG][Camera Thread][SQ;AF;] Calculating step metric…
[02/10/20 23:55:27.070][DEBUG][Camera Thread][SQ;AF;] Taking auto focus frame(s)…
[02/10/20 23:55:27.074][DEBUG][Camera Thread][SQ;AF;] ASCOM camera: Capturing auto focus frame…
[02/10/20 23:55:27.074][DEBUG][Camera Thread][SQ;AF;] ASCOM: AF Binning: 1x1…
[02/10/20 23:55:27.074][DEBUG][Camera Thread][SQ;AF;] ASCOM: AF Exposure length: 8 seconds…
[02/10/20 23:55:27.074][DEBUG][Camera Thread][SQ;AF;] ASCOM: AF Exposure DL speed: HIGH
[02/10/20 23:55:27.074][DEBUG][Camera Thread][SQ;AF;] SetAscomHighSpeed…
[02/10/20 23:55:27.075][DEBUG][Camera Thread][SQ;AF;] Cannot set readout speed, not supported by camera…

Here is the log fileif SGP could help I would be much obliged.

https://1drv.ms/u/s!Asuc5vkHrzUUhK9m3qyM1jcdCMq2CA?e=4as2CX

Have a look through this https://www.youtube.com/watch?v=s8xc1DBbHT0

After you have manually focused the telescope and click start on auto focus, then SGP will zoom out however many steps you put in for your step size. What kind of focus numbers does that give you on stars on that first picture?

If I can get the scope focused to 2.0 HFR then I have mine set to go out far enough to get my stars around 6-8.0 HFR and then it will work ok. I have several setups with various motorized focusers and this always gets a tunable V curve.

Also, I use 7 steps on everything from a RASA to a 70mm APO. I’ve never needed more or less steps on any rig. My seeing is never very good from the city.

Thanks,
Charles

yes thank you I had watched that. I guess I will watch it again in case I missed something.

If the step size is too big that first picture won’t find any stars because it defocused too much. That might not be your problem but that has happened to me numerous times on new setups. I would cut the step size in half until that first picture found something then tune it from there. This might not be your problem but it sounds familiar. Hopefully that helps.

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One thing I’ve learnt is setting some backlash compensation making focusing a lot easier

Cheers,
Kijja

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