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About LucMurphy

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  • Birthday May 5

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    Montreal, Canada
  1. Got it! Believe it or not, it was a "cultural" issue. The Win 10 that was installed is the French version (even though I had the Win 7 English version) which handle the decimal point with a coma instead of a period. Visual Basic doesn't like. I change the language pack, and everything works perfectly now, including AS 5222. Thanks to this community for the support. Luc
  2. Hi All, I got Win 10. Did not ask for it but got it anyway eventhough I always refused the autoupdate. In anycase, AS doesn't work. I tried the USB backward update as described in "how to recover the usb control". Nothing. Uninstalled AS 5222 to re-install 5219 and 5218 with going through the USB fix. Nothing. And i mean nothing. I am not even getting the error message "could not connect to controller". AS crashes after a fraction of second. I get the same thing if I connected to the mount or not. Any suggestion? Before reverting back to Win 7 I would like to give Win 10 a try
  3. Yes it is possible. I had to replace the stock FLI Camera power cable because it is fairly rigid in warm temperature but it is getting solid in sub-zero temperature. Even with good cable management, it was dragging the mount. To make sure, you need to do a "time flex" measurement (in Sequence). The default parameter is measuring time flex when the tube points toward the zenith. To perform a better diagnosis, you may have to measure 2 or 3 more positions. The different positions will induce different tension in the cable (or should at least) and therefore should produce a different time flex
  4. I concur with George. Even if you do not feel any wobble, the mechanical device that moves the mount up or down (being an electrical motor or hydro-mechanical piston) will take time to settle to a final resting position. Even worst, you could have minuscule slippage in the up position. I suggest that you do a flexure measurement with the mount in the most stable position (down) after several hours on being in that position and see what happens. Which brings me to a totally different subject. If I interpret the picture correctly, the imaging train is: Focal reducer OAG Focuser Filter w
  5. I don't think you have a balancing issue, or at least not a big one. From my experience with a similar albeit scaled down setup (DDM60+C11), if you are getting the red lines reasonably close (let's say From what you wrote, I think the issue is flexure in the imaging train, not mount inbalance. You live in Utah which get freezing temperature at night. Is it possible that you went from 5" flexure to 30" from summer to winter? Don't laugh, that is what happen to me. I made several mod to improve the rigidity of my setup (documented in another email trail) but the biggest contributor was cabl
  6. I was just thinking about the same. How we going to have a Christmas gift under the tree next week? Luc
  7. I kind of recollect that one DDM85 user had reported 45 min unguided subs with a C14 but i can't find the post in this forum. maybe it was in the old yahoo forum
  8. I second Jay's recommendation to use Sequence hysteris and time flex measure tools. If you already are able to acheive subs of 400 sec undguide, it probably means that the hysteris is pretty much under control. To improve, first you need to measure timeflex before doing anything (that will be your baseline), try changes to your setup (hoping it will improve the ridigity) and measure timeflex again to see if the change had any effect or not. This is the only way because time flexure cannot be cancel with MLTP. In the world we are leaving, more expensive usually means better... but not alway
  9. Hi, To compare apple with apple, you should also add the length of the tube (moment of inertia) and the equipment weight ratio. OTA: C11 HD; fl = 1800 mm; 067"/pix; in my part of the world, the scope must have dew shield. It doesn't seems much but the shield those increase significantly the moment of inertia. Mount: DDM60 non-pro mounted on a "permanent" tripod (moving to a permanent pier soon) 80 points file Weight ratio = approx. 80% (equipment weight to DDM payload capacity) I get very consistent 10 min sub and about 75% success rate for 15 min sub. I did achieve 20 min, but
  10. Hi Jay, How to get MaxPilote to run Sequence and create a new MLPT (if you do)? Thanks Luc
  11. hysterisis also affects MLPT but it is partially "removed" when the MLTP run starts. So, in my experience with my setup, time flex is sometime I needed to control more closely than hysterisis. Other may have other experiences. To make a long story short (remember, it took me 6 months of trials and errors to fix the problem), I made my setup more rigid by adding a second dovetail on top of the C11, made my rotable focuser non-rotable, added provisions to prevent main mirror flop and other minor stuff. All that allow the flex to go down to about 5-6 arc sec / 20 min. And then, it started to
  12. The hysterisis will affect the pointing accuracy while the flex will affect your MLPT performance. Both error cannot be modeled. I saw hysterisis error from 30 arc sec to 60 arc sec (DDM60 + Celestron 11in.) depending on the season (I get from +20 degC to -20degC). Personnaly, i can live with a pointing error of a few minutes. Not great but it is workable. I was initially getting a time flex error of 10 arc sec / 20 min. that is definititely not good for long un-guided exposure. After a 6 months investigation, my time flex when down to less than 2 arc sec / 20 min! That's one of the beauty o
  13. Correct, just an electronic finder. The SSAG is from a previous setup not involving the DDM60, so instead of living it sitting on the bench, I said why not make it useful.
  14. Hi Gerald, Actually, the mini-dovetail is on the front end of the bottom rail, I am attaching the finderscope and some weight to the dovetail. you would think it is a cumbersome place to put the finderscope, but i never use it visually. A star shoot auto guider (SSAG) is always attached to it. Having the weight at the bottom of the tube has the advantage of lowering the center of gravity and hence the moment arm. Not by much but i saw a difference to when it was on the top rail. I estimate that this setup help me saved about 1 kg. My scope is all packed up for a local astrophoto works
  15. I had a similar problem. In the process of trying solving it, I went throught the same process as you on the software side with no real results. I then did several timeflex measurements with sequence to finally find out that the cables were introducing a drift that was orientation-dependant and that got worst in cold weather. The solution was to do a better cable management. I am not saying your problem is cable management (mainly because you have the pro version) but if you do a couple of timeflex, you could eliminate any mechanical/setup problem. Very important though, do a couple of timefl
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