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Everything posted by skybadger

  1. As would I,just for the skies of course.
  2. And what would your price point be ? You can buy pulsar after-market dome drives to do this. £750? How easily does your dome revolve ? Can you measure it ? I can t think of a kit that is cheap enough in brand new parts. Even using scrap parts, you still need new motor control parts , brackets, housing and software. What about a print-yourself kit?
  3. I thought we'd done as a community that via the belting and pulley solution.. What more do you need? There are ascom drivers for those solutions in open source.
  4. I tried that to start. However I recommend that you consider which is your primary pointing scope and whether it is cone error adjustable . Then decide.
  5. Mine does. I use Altair tms dual mount and it bolts to one end of the long dovetail .
  6. skybadger

    computer has had it

    Absolutely it does. That's why I keep mine on under power saving mode. The reason mine died was due to a power cut and failure to restart after meant it got damp..
  7. skybadger

    computer has had it

    No sooner had I written this than my PC died, with a psu fault.
  8. skybadger

    Correct control of stepper motors

    Yes, and you know roughly how long it takes to transition from slew to track so build that into your landing point estimate in terms of time and position then make small feedback adjustments when you get that based on a real time.
  9. skybadger

    Correct control of stepper motors

    Actually you don't need all those pins. Upgrade to the trinamic controllers and you can use spi and run all three off a serial interface. The onstep drives two axis motors and two focus motors this way.
  10. skybadger

    Correct control of stepper motors

    In order to run at tracking rates and slew rapidly, you will need to use those micro steps and keep track. Change electronic gears on the microscope boundaries and you can keep track. Overdrive the steppers in voltage to get good stepping rates, your controller is good for 4amps of current control. You might like to have a look at onstep and ramps for examples of handling slew movements. Both have available source code.
  11. skybadger

    computer has had it

    It not beeping is interesting. Sounds like no attempt to boot at all, in which case alternate psu is where I would start
  12. skybadger

    computer has had it

    Bring it indoors and let it warm up and dry out. Mine runs all the time in the obbo but reduces power to disks and screen. If I get a powercut and it doesn't come back online it will get cold and damp and then refuse to start unless I warm it up. A loud noise may also be a hard disk that doesn't like the damp.
  13. When I was at school there was a local observatory with stepladder. This ladder was fixed open, moved on wheels and had steps that could be tilted back flush to form a seat at whatever height you needed. It was great for observing. Anyone seen one or know of any for sale ?
  14. skybadger

    Observing ladder with folding steps

    Thanks all. The Berle Bach is too low, but not far off, the air ladders I don't see how to use that as a seat and a step ladder. Looks like I might have to make my own.. Cheers
  15. skybadger

    Low rise skysurfer - how ?

    Hi all, I have a baader sky surfer V which has a high rise stalk for mounting on a scope using the normal dovetail shoe. However the manual talks about a method of mounting the tube direct to the dovetail to bring the tube closer in . I really can't fathom how this is supposed to work. I have a tube, a piccaninny rail clamp, the high-rise stand and a dovetail piece. Can anyone provide guidance ? Cheers Mike
  16. I am looking for advice on losmandy-style mounting bars and the sensible loading vs length to achieve a side-by-side mounting that doesn't show deflection under load. I have an existing side-by-side losmandy arrangement using Altair TMS parts to carry an 8" Cass at one end and a 5" refractor/80mm guider pair at the other end. This is on an EQ8 and uses a 300mm bar to separate the scopes, along with a FLO adjustment mount for co-alignment. The weight of each of the Cass is about 10Kg with filters and cameras and mounting gear and the other end maybe about 13Kg, that seems to work fine. I am moving to a 12" Cass that has a 16" tube and weighs about 13Kg all up. That means I need a longer central rail. I think I need one at least 15= 9" + 6" long or one slightly longer where I can move the guider down to between the other two. Is this too much for a central rail ? Is there a heavy-duty rail I can get for this sort of arrangement ? I am worried about deflection between the two ends of the side-by-side bar due to the weight. The EQ8 central dovetail is about 8" long so the middle is well supported and the cantilever distance will be about 5" at each end if balanced in mass.. Thoughts? Cheers
  17. Thanks David Not sure I am looking for a simple answer but it all helps. The key issue I think I have, notwithstanding the fit of dovetails to each other, is the degree of mechanical droop for each weight at the end of a lever arm. What size of dovetail bar doe I need ? I think this is measured in thickness of the bar. Cheers Mike
  18. skybadger

    Turning a Vixen GP into a goto

    Or the onstep system or a instep board, or a little-foot... The steppers on the mt1 are up to the job, you need to put 18 or 24 volts across them with ballast and current control to get better speeds out of them. The Heq5 are the closest to a drop in. I did the goto4all MOD from etx motors onto an old Sx mount, followed by building an SS2K control onto a larger vintage mount. Working on assembling a instep for my horseshoe mount now.
  19. It happens that all the t2 adapters are made that way, it's just a real faff in the dark to use them for rotation. Well done for finding some thumb screws that fit.
  20. I do this with the part provided by Nikon when I bought the camera. I'm sure there is one for yours. Have I noticed a difference ? Er, no. But I'd be surprised if I couldn't find one after looking.
  21. I'm interested. Shame about dogs though. What's the camping like in March, temperature wise and is everyone taking tents or caravans ? Cheers Mike
  22. skybadger

    Need help with Adapters

    Actually I'm surprised that you need an adapter, you seem to have everything you need for the prom filter and it should take a 1.25"e.p. directly. Unless it's 2" fittings you are short of.
  23. skybadger

    Need help with Adapters

    Compare it with this: https://astromart.com/classifieds/astromart-classifieds/solar-filters/show/eclissun-coronagraph-sale-pending KP82 Can you read the manufacturer ? I can't find one on the web from takahashi. Borg maybe ?
  24. skybadger

    Need help with Adapters

    Oh and baader also do a 68/60/56 mm eyepiece clamp that would fit so with the adapter you mention you should be good to go. You can also find them at telescope express. MIKE
  25. skybadger

    Need help with Adapters

    That's a coronograph, used to occult the body of the sun so you can see the much fainter prominences around the edges. I've only seen antique scopes built to have the occulting disk (that filter thing) further up the tube. The prominence on the picture gives it away. You might find that scope is built specially for that purpose alone. Also, normally there are multiple different sizes of occulting disk to take into account the different apparent size of the sun during different seasons. Do you have them ?. I'd buy that from you if you're not going to use it. First time I've seen one. The other widget with screws on is a reticle projection unit used for guiding. Does that help ? Mike

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