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masjstovel

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About masjstovel

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    Star Forming

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    Norway
  1. Thanx @Carbon Brush! Peter, alot of holes yes! i imagine i need to have an exact fit, but its normal to use 2 screws - 1 in center each way? That way those "long" holes are nice. I mean, if not it has to fit the holes on the opposite vixen perfectly (?)
  2. Thank you! Thats very useful information! I have the SW medium vixen dovetail https://www.teleskop-express.de/shop/product_info.php/language/en/info/p9965_SkyWatcher-Vixen-style-Dovetail-Bar---length-21-cm.html If i keep the tube rings in the same distance as before, and mount the vixen on top - will it still fit the Losmandy holes on the bottom? I think the 15" (38,1cm) is the one i would go for.
  3. Hi, I am unfamiliar with the Losmandy dove tail bars, but i want one. I have a SW 150PDS with the standard tuberings. I want a Losmandy between 30cm-40cm and I see there are hundreds around. They all fit to the standard Sky Watcher tube-rings or is there something i need to be aware of regarding this? If thats the case - which fits?
  4. @Ishan Mair if you disassemble, please have 100% control of the white/blank teflon washers - which, where and how many etc.. Be aware that it can be 2 greased together that looks like 1 and so on:)
  5. I think it is in part 4. I can post a video yes, but im away until 2.January. I slackened off the DEC axis to the point of satisfaction before i left, and it spins very freely now. Only thing is what I mentioned that the axis loosen from the bearing in some positions. I will loosen the RA axis, and use some drops of loctight between the bearing and axis in DEC when i get home, and you will see the result. Sholdnt take more than an hour or so to fix. Good question. Out from what i could see on the construction when i took it apart, i would say no. I would guess that tightness to be either the bearings or that the axies are too tightened together. I am not qualified to say that though. You could just try unscrewing the 3 set-screws on the weightshaft - loosen it a little bit but ensuring that its not loose 90degrees according to @teoria_del_big_bang 's drawing and try:)
  6. If you put polaris or some daylight object in center of your polarclock, Then use ONLY altitude bolts to send it down to the circle then this is your exact 6 o'clock position. Then calibrate or use a marker on your RA-setting circle and youre good to go:)
  7. @Ishan Mair i am still not 100% satisfied with my problems yet, but i dont mind at if you're posting about your problem too:) I might have a sollution for you. In Martin Pyotts videos on youtube he mentions the exact problem you describe. Its a common mistake that the whole brass-wheel gets greased, when its just the teeth that need greasing. Symptoms when greasing the whole part, is as you describe: The clutch dont brake very well. I too had the problem like you, just not as bad as you describe. When i did the supertuning there was alot of grease on that brasswheel where the clutch grips (factory grease - 2nd owner but saw no signs that the mount had been disassembled before), which i removed. Now the clutches grip very well.
  8. I get what you mean yes. I followed astro-babys and Martin Pyott youtube videos during the supertune. Really helpful with the videos in addition as they shows some nitty-gritty good details thats hard to do with text and pictures. Yes i understand your sketch. I did it a couple of nights ago on the DEC axis. Its not movement in the 90degrees direction, but its also not very tight i would say. Tight is subjective:) What i did discover was that the axis "breaks free" from the bearing from time to time. Its the bearing that its not coneshaped in the DECaxis in top of the picture below. Meaning the axis-shaft is spinning and the bearing does not over 10-15degrees aproximately. So i thing there is some grease on the inside-ring of thst bearing. Will try some drops of loctite and reassemble the axis. Regarding the video: it has very much approved since then:)
  9. @teoria_del_big_bang I think i understand now. Taper roller bearings - you mean those cone-shaped 1 per axis? How you mean handtight now? They must be fully in their slots yes? On DEC Axis it is the weight-shaft that determines the tightness i think. I tightened it as hard as i could with my hands, than slackened off like 1/4turn. DEC seems tight still, so i could try slacken it a bit. On RA Axis its in the polarscope end. I tightened that as hard as i could with my hands, because it was VERY tight to get off when i stripped it down. Should i try loosening it a bit?
  10. Thanks for the reply, Steve. It seems like alot is simular to my NEQ6. Regarding your learning points: Sorry, my English is not the greatest, but which bearings is the thrust-bearings? The taper rolling bearings, i presume you mean the ones that keep in place the wormgear (Not the brass one, but the thinner rod)? I made these pretty slack - so i could spin them around with my hand, but so there was no slack in it - this is what you mean? Been re-adjusting it today. I am down in maybe 0.5mm backlash in the visual center. RA turns 360degrees fully loaded with gear. It sounds great, but I have a feeling the motor is crying for help as it was grinding just a couple of millimeters back on the aligning-setscrew. No grinding - happy astronomer? Or do i need more slack? About the balancing. I bought SKF bearings and regreased them with SuperLube. All except the 6 bearings keeping both RA and DEC axis in place. I felt i did more damage then good when trying to remove the rubber seal on those, and SKF says it can handle minus 40degrees Celsius so i thought i could just live with it. Anyways, the old bearings were little grease in them - so they span much quicker around than the new ones with grease. Thats normal, i know - but it also makes more resistance when spinning the RA and DEC axis. It is more even all the way around, but its more "slowness" sort of. I had an expectation that i could push the scope and it would spin around forever kind of. Do you understand what I mean, and do you have any thoughts on this - Video attached showing this? Lastly, the point im making here is that this "slowness" is making it harder to balance correctly, especially the RA-axis since it takes more force to get feedback kind of. Thanks for the PEC-thread, I will go through it!:) I got the first telescope gear in Mars this year so you have 50% more experience than me I have seen that one yes. Plan is to see how guiding goes with this minor backlash, and if im not satisfied, this will be my next gear! Here's a video of the spinning: The RA-clutch is veery loose so could be some minor binding of that in the video. Sorry about the mess on the floor. My attict has turned into a workshop Supertuned spinning axis.mp4
  11. Hi, Been supertuning my NEQ-6 the last 2-3 days. stripped it down, cleaned it, and changed all the bearings, added belts to the motors and re-assembled it. Problem occurs when aligning the wormgear in RA-axis. Been at it for hours now and i've found that if i tighten the setscrew to the point that there still is a tiny minor backlash, the motor cannot handle it and starts to grind and stops. So i slacken it to maybe 1mm backlash (in visual center) and the motor can handle it. So my question is: do i live with the backlash or is there any other things i could try in addition to the alignment?
  12. Ok, I dont know what your mount requires and all, but i had simular symptoms as you and that was that i had a 1.5A power supply and my mount needed 2.5A.
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