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About MarkS

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    Melbourne, Australia

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  1. With a heavy load, balance is very critical on both axes, particularly RA. The total load (OTA plus camera etc) should not exceed 28 kg for the DDM60. Overloading these mounts must be avoided!!! Read the recent discussion on balancing - I think it's the 'DDM85 position crash'. It is definitely a case of near enough is NOT good enough! Balance is critical. Tuning the motor parameters is well covered in the manuals. Always worth a read, even if one knows what one is doing, but I suggest you don't try to push the PID numbers too hard - the system will tell you that you have gone too far
  2. Recently I had to go through commissioning a new laptop. I thought I knew what I was doing as I had been using two ASA systems for years. It turned out that I had forgotten about some critical but simple steps, and after the mount heading off for the wrong hemisphere and refusing do what it was told, I gave up and called Wolfgang at ASA for a Teamviewer session. He sorted it in about 2 minutes - much to my shame! The basic problem was, that in spite of having all the software and program data properly installed, it is critical that you 'Set new Homeposition' after having done the Homefind
  3. Try setting park1 as your horizontal OTA position, and set Park2 to the zenith Mark
  4. You could leave Park1 at the zenith, as it is useful for testing, and use Park2 as your parking position. Mark
  5. PS: Read the thread on DDM85 position error crashes. Cheers, Mark
  6. What load is the mount carrying? These currents look high to me on both axes. My DDM 85A carries an OTA and camera with a total weight of about 28kg - which is a relatively light load. Current on the DE axis is usually below 0.3A, and on the RA axis usually below 1.2A. The currents are dependent on load, however I do not know what the current vs. load curve is. Mark
  7. I have an ASA 0.73 Reducer, and its dimensions are exactly as per the ASA drawing. Are you sure what you have is an ASA reducer? Mark
  8. Hi Waldemar, The USB3 signal wires are definitely heavier and better constructed than USB2, but the USB2 signal wires within the standard USB3 cable are thinner and there is only one pair, whereas the USB3 wires are paired. On Type A connectors, the USB3 do not connect to the USB2 contacts. Whether the USB2 wires are better quality in USB3 cables than they are in USB2 cables I do not know.... I have certainly had no problems using USB3 cables from mount to computer. Mark
  9. Looking at the cable specs for USB3, it is clear that a USB3 cable Type A connects to a USB2 Type A socket via a separate pair of wires from the USB3 ones. That is, Ian is right - it is probably better to spend your money on best quality USB2 cables than USB3 ones. Mark
  10. Hi Antonio, Interesting find! Lovely detail and colour - your trademark! Mark
  11. Hi Luis, Great image - detail and colour look superb. Nice to see this, as Andromeda is very low on my horizon.... Mark
  12. Hi Robert, This may not be very helpful, but after a recent extremely baffling problem with a new camera, I am prompted to ask if you have tried changing the USB cable? They are notoriously unreliable. Regarding your query about start-up sequence, I have always started the mount before turning on the computer and Autoslew. When I was learning the ASA system, I found that this sequence always worked, and I've never varied it. I'd like to know if others do the same? Mark
  13. Thomas, Great set of images. If I had to choose one it would be M100. Mark
  14. Hi Antonio, Another splendid image of a dark nebula! Mark
  15. MarkS

    LBN 258, GM 2-41

    Hi Antonio, Another splendid image! All the more interesting because it is over my horizon Thanks for showing! Mark
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