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Found 3 results

  1. Hi People, I have quite severe backlash, such that guiding assistant just gives up. It seems to be about 11 secs in total, the one time GA came back with anything, but it's about 3-4 secs if I measure it by hand. Here's some guiding. Actually, it's worse when I'm dithering. So, I tried measuring the backlash with by counting and it's about 3-4 secs. If I used PHD2 guiding assistant, mostly it fails, or it comes back with a very big number, like 11,350 msecs. I tried entering this: But then I got a see-saw mechanism, even when I dropped 8,000 to 3,000 it was the same. I've taken the motor off just now and looked at the grub/hex-screw mechanisms. One hex-screw was loose, so I tightened it to hand tight and let the grub-screw off an eighth of a turn. I'll look again this evening. I ran a three hour sequence of exposures on NGC6888 (with dither) and this is what I got on EVERY image. Amazingly, they stacked nicely. So last night I ran without dither and it was mostly OK. What I want is full dither, but to do that I need to deal with the backlash. Here's a photo of the motor and gears, most of the backlash seems to come from the top gear (ie the 12-tooth gear and its neighbour). I guess the rest comes from the worm-gear: Does anyone have any suggestions? There doesn't seem to be a belt-mod for the EQ5 as far as I can see. Maybe there are better Dec backlash compensation settings I could use. Thanks, Steve.
  2. So I had this problem where if I put my finder scope on my OTA, and the finder scope is around 135 degrees from the mounting part of the scope. This made my DEC axis always stay leveled but never stay in any position I put it in (if I turned my RA axis to the balancing position, then the DEC axis to balancing position and moved the DEC axis anywhere, it would go back to horizontal or balancing position). Any help would be nice Emlis
  3. Back in December, I managed to break the locking lever on the DEC axis of my NEQ6 and so bought a replacement from 365astronomy. The advert didn't mention the NEQ6, so I contacted them before ordering and they assured me that it was suitable. Now this bit is from memory, but I know there was something about the lever that did not fit the bolt, so I replaced the bolt with the one sent as well and all seemed to be well. Havng missed Wednesday night, I was really anticipating getting out last night for the first time this year. But, having set up the mount, there was nothing I could do to get the DEC clutch locked. I even removed the little lever and applied 'extra' pressure with a spanner - to no avail. A perfect evening's imaging completely kiboshed before it had started. I was about to say "You have no idea how much that irritated me" - but I guess you do. And could I find the original bolt? Not a chance - I'd put it "somewhere safe"! Took me for ever to get to sleep last night after that. Going to have to have a good look through everything this morning and see what can be salvaged. There are occasions when this hobby really makes me wish it would go visit a taxidermist on its own behalf.
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